# MayOnlineTools (MoT)

> Fast, privacy-first online & offline tools platform (also operating natively as MayOfflineTools / MoT) featuring 183 client-side utilities for web developers, designers, and creators. All computations execute 100% locally in your browser with zero server latency and complete data privacy.

MayOnlineTools provides an extensive suite of browser utilities including mathematical calculators, data converters, text processors, code cleaners, cryptography hash generators, and networking tools. No data, files, or sensitive payloads are ever sent to external servers.

## Core Navigation & Directories

- [Homepage](https://mayonlinetools.com/): Live interactive tool workspace with instant search and tool switching.
- [Tool Library](https://mayonlinetools.com/library/): Complete searchable index of all 183 tools with multi-token search, categories, and suite tags.
- [Educational Hub](https://mayonlinetools.com/hub/): Master tech guides, operating system cheat sheets, Windows 11 & 10 optimization manuals, and privacy tutorials.
- [Platform Updates](https://mayonlinetools.com/updates/): Comprehensive release notes, version changelogs, and technical enhancements.
- [Local AI Studio](https://mayonlinetools.com/ai/): Private in-browser AI models running on your own GPU via WebGPU (AI Speech-to-Text with Whisper Tiny/Base/Small across Dutch, English, German, French & Spanish, AI Background Remover with MODNet, AI Text Summarizer with DistilBART & BART Large CNN, AI Image Captioning with ViT-GPT2, AI Sentiment Analyzer with DistilBERT & BERT Multilingual 5-star tone rating, and AI Local Chat & Code Assistant with Qwen2.5 General & Coder Specialist — click-to-launch, cached locally, no uploads).
- [About MayOnlineTools](https://mayonlinetools.com/about/): Mission, independent developer background (Chris, Netherlands), four core pillars, and 100% client-side privacy architecture.
- [Sitemap](https://mayonlinetools.com/sitemap.xml): Search engine indexing manifest covering all 259 platform URLs.
- [AI Catalog](https://mayonlinetools.com/ai-catalog.json): Machine-readable Agentic Resource Discovery (ARD) manifest.

- [JSON Flattener & Unflattener](https://mayonlinetools.com/?tool=json-flattener-unflattener): Flatten nested JSON objects into dot-notation key-value pairs for CSV/ETL imports and unflatten back to deep JSON trees.
- [Conventional Commits & Git Branch Generator](https://mayonlinetools.com/?tool=conventional-commits-git-branch-generator): Construct standardized Conventional Commits with scopes, breaking changes, and derive clean Git branch names.
- [UUID, ULID & NanoID Collision Probability Calculator](https://mayonlinetools.com/?tool=uuid-ulid-nanoid-collision-calculator): Calculate mathematical collision probabilities (Birthday Paradox) across UUIDv4, UUIDv7, ULID, and NanoIDs.
- [XML Sitemap Generator & Validator](https://mayonlinetools.com/?tool=xml-sitemap-generator-validator): Generate Google/Bing compliant XML sitemaps from URL lists with changefreq, priority, and lastmod ISO dates.
- [Base32 & Base58 Encoder / Decoder](https://mayonlinetools.com/?tool=base32-base58-encoder-decoder): Encode and decode text and hex using RFC 4648 Base32, Crockford Base32, and Bitcoin/IPFS Base58.

## Educational Hub Guides & Cheat Sheets

- [Windows 11 & 10 Ultimate Optimization Guide](https://mayonlinetools.com/hub/windows-11-10-ultimate-optimization-guide/): Speed, telemetry removal, safe bloatware debloating, and power plan tuning.
- [Complete Windows Keyboard Shortcuts Master Sheet](https://mayonlinetools.com/hub/complete-windows-hotkeys-cheat-sheet/): 120+ categorized hotkeys for desktop, window snapping, virtual desktops, Explorer, and Terminal.
- [Linux Terminal & Sysadmin Cheat Sheet](https://mayonlinetools.com/hub/linux-terminal-sysadmin-cheat-sheet/): 100+ commands for permissions (chmod), systemd services, disk diagnostics, and networking.
- [macOS Power User Guide](https://mayonlinetools.com/hub/macos-power-user-shortcuts-and-tweaks/): Hidden Command hotkeys, Finder workflow tricks, Terminal defaults tweaks, and Homebrew.
- [Web Security & Browser Privacy Hardening](https://mayonlinetools.com/hub/browser-privacy-security-hardening/): Zero-trust browsing, encrypted DNS (DoH), uBlock Origin, WebRTC leaks, and Passkeys.
- [Cross-Platform Developer Setup](https://mayonlinetools.com/hub/cross-platform-developer-environment/): Modern GPU terminals, Starship prompt, production Git configuration, Ed25519 SSH, and WSL2.
- [Docker & Containers Master Cheat Sheet](https://mayonlinetools.com/hub/docker-containers-master-cheat-sheet/): Container lifecycle CLI, multi-stage Dockerfiles, Docker Compose v2, and deep storage pruning.
- [PowerShell 7 & Sysadmin Cheat Sheet](https://mayonlinetools.com/hub/powershell-scripting-sysadmin-cheat-sheet/): Object pipelines, Where-Object filtering, SHA-256 hashes, and Test-NetConnection diagnostics.
- [Git Version Control Master Cheat Sheet](https://mayonlinetools.com/hub/git-version-control-cheat-sheet/): Interactive staging, squashing commits, stashing untracked files, and Reflog emergency undos.
- [Vim & Neovim High-Velocity Cheat Sheet](https://mayonlinetools.com/hub/vim-neovim-master-cheat-sheet/): Normal/Visual/Command modes, motions grammar (ciw, di"), regex substitution, and macros.
- [Networking & Wi-Fi Troubleshooting Guide](https://mayonlinetools.com/hub/network-troubleshooting-command-guide/): Cross-platform DNS flushing, continuous latency/packet loss (MTR), port testing, and Wi-Fi scanning.
- [Android & iOS Mobile Power User Secrets](https://mayonlinetools.com/hub/android-ios-mobile-power-user-guide/): Developer 0.5x speed tweaks, system-wide Private DNS adblocking, battery 80% preservation, and privacy.
- [Regular Expressions (Regex) Master Cheat Sheet](https://mayonlinetools.com/hub/regex-regular-expressions-master-cheat-sheet/): Engine mechanics, greedy vs lazy quantifiers, zero-width lookarounds, atomic groupings, and ReDoS catastrophic backtracking prevention.
- [SQL Query Optimization & Indexing Architecture](https://mayonlinetools.com/hub/sql-query-optimization-and-indexing-guide/): Decoding EXPLAIN (ANALYZE, BUFFERS), B-Tree composite indexing rules, SARGable predicates, and autovacuum tuning.
- [Modern Web API Architecture & HTTP Security Headers](https://mayonlinetools.com/hub/web-apis-http3-security-headers-guide/): HTTP/3 QUIC transport, strict CSP rules, bulletproof CORS handling, token rotation architectures, and automated curl security auditing.
- [Modern Cryptography & Secure Hashing](https://mayonlinetools.com/hub/modern-cryptography-hashing-engineering-guide/): Argon2id vs Bcrypt memory hardness, timing-safe HMAC webhook verification, and authenticated AES-256-GCM encryption.
- [Kubernetes (K8s) Master Cheat Sheet](https://mayonlinetools.com/hub/kubernetes-k8s-container-orchestration-cheat-sheet/): kubectl commands, decoding CrashLoopBackOff and OOMKilled states, zero-downtime rolling updates, and pod security contexts.
- [JSON, YAML & Data Architecture Engineering Guide](https://mayonlinetools.com/hub/json-yaml-data-architecture-engineering-guide/): Overcoming JSON serialization pitfalls and BigInt truncation, bypassing the YAML Norway problem, runtime validation with Zod, and JSONL streaming.
- [SSH Keys & Remote Server Hardening Guide](https://mayonlinetools.com/hub/ssh-keys-and-remote-server-hardening-guide/): Ed25519 key generation with KDF rounds, SSH multiplexing, bastion jump hosts, tunnels, and sshd daemon hardening.
- [Production Bash Shell Scripting Runbook](https://mayonlinetools.com/hub/bash-shell-scripting-production-runbook/): Defensive strict mode (set -euo pipefail), parameter expansion without subshells, signal traps, and getopts CLI parsing.
- [Modern CSS Flexbox, Grid & Responsive Architecture](https://mayonlinetools.com/hub/css-flexbox-grid-responsive-architecture-guide/): 1D vs 2D layout mental models, intrinsic auto-fit card grids, CSS Subgrid alignment, fluid clamp() typography, and container queries.
- [Nginx Reverse Proxy & Web Server Cheat Sheet](https://mayonlinetools.com/hub/nginx-reverse-proxy-and-web-server-cheat-sheet/): Real-IP preservation, WebSocket and SSE non-buffering, upstream load balancing (least_conn), TLS 1.3 hardening, and leaky-bucket rate limiting.
- [Advanced TypeScript & Generics Guide](https://mayonlinetools.com/hub/typescript-advanced-types-and-generics-guide/): Discriminated unions, exhaustive checks with never, conditional types with infer, template literal types, satisfies operator, and zero-cost branded types.
- [Linux Automation: Cron Jobs & Systemd Timers Runbook](https://mayonlinetools.com/hub/cron-jobs-systemd-timers-automation-guide/): 5-field crontab rules, avoiding silent environment failures, non-blocking locking with flock, Systemd OnCalendar timers, and journalctl diagnostics.
- [IPv4 Subnetting, CIDR & Routing Guide](https://mayonlinetools.com/hub/ipv4-subnetting-cidr-routing-guide/): Binary octet math, usable host capacity formula (2^(32-n)-2), RFC 1918 VPC architecture, supernetting aggregation, and Linux iproute2 commands.
- [Core Web Vitals & Web Performance Guide](https://mayonlinetools.com/hub/core-web-vitals-web-performance-guide/): Slashing LCP with high-priority WebP/AVIF hero images, taming INP with scheduler.yield(), zero-CLS aspect ratio containers, and resource hints.
- [OAuth 2.0, OpenID Connect & JWT Security Guide](https://mayonlinetools.com/hub/oauth2-jwt-token-authentication-guide/): Authorization Code Flow with PKCE, JWT claims validation (iss, aud, exp), HttpOnly token storage, and refresh token rotation with reuse detection.
- [Database Primary Keys & Distributed ID Guide](https://mayonlinetools.com/hub/database-primary-keys-uuid-architecture-guide/): B-Tree index fragmentation mechanics, UUIDv7 and ULID time-ordered sorting, BigInt auto-increment, and dual-key public API architectures.
- [Time, Timezones & Epoch Distributed Systems Guide](https://mayonlinetools.com/hub/timezones-epoch-distributed-systems-guide/): Unix epoch seconds vs milliseconds, strict ISO 8601 / RFC 3339 parsing, avoiding Daylight Saving Time missing-hour bugs, and monotonic performance timers.
- [REST API Architecture & HTTP Status Codes Guide](https://mayonlinetools.com/hub/rest-api-design-http-status-codes-guide/): Resource URI noun grammar, safe and idempotent method semantics (GET, PUT, DELETE vs POST), definitive status code decision trees, and cURL debugging.
- [Technical SEO Architecture & Schema.org Guide](https://mayonlinetools.com/hub/technical-seo-schema-structured-data-guide/): Semantic HTML5 heading hierarchies, JSON-LD TechArticle and Breadcrumb schemas, canonical URL discipline, and robots.txt crawl directives.
- [Password Storage Security & Salting Guide](https://mayonlinetools.com/hub/password-hashing-salting-security-guide/): Why fast hashes fail against GPU attacks, Argon2id and Bcrypt memory hardness, salting mechanics, constant-time equality, and NIST SP 800-63B standards.
- [Web Accessibility (a11y) & ARIA Runbook](https://mayonlinetools.com/hub/web-accessibility-a11y-keyboard-navigation-guide/): WCAG 2.2 Level AA compliance, semantic HTML vs custom divs, accessible modal focus trapping, :focus-visible outlines, and aria-live regions.
- [CI/CD Pipeline Security & GitHub Actions Guide](https://mayonlinetools.com/hub/cicd-pipeline-security-github-actions-guide/): Pinning action commit SHAs against supply chain attacks, preventing script injection, dependency caching, matrix testing, and passwordless OIDC cloud auth.
- [Modern Web APIs & Architecture Runbook](https://mayonlinetools.com/hub/modern-web-apis-streams-workers-guide/): URLSearchParams parameter handling, Fetch cancellation with AbortSignal, zero-memory ReadableStreams chunking, Web Worker thread offloading, and multi-tab Web Locks.
- [WebSockets & Server-Sent Events (SSE) Runbook](https://mayonlinetools.com/hub/websockets-sse-realtime-architecture-guide/): RFC 6455 framing and handshakes, HTTP/2 multiplexed SSE, exponential backoff with jitter, heartbeat watchdogs, and Redis Pub/Sub cluster backplanes.
- [HTTP Caching & CDN Invalidation Runbook](https://mayonlinetools.com/hub/http-caching-cdn-architecture-guide/): RFC 9111 Cache-Control directives, stale-while-revalidate background refresh, cryptographic ETag validation, Surrogate-Key edge purging, and immutable asset fingerprinting.
- [Email Authentication & Domain Security Runbook](https://mayonlinetools.com/hub/email-security-spf-dkim-dmarc-guide/): RFC 7208 SPF lookup limits, OpenDKIM key generation with RSA 2048, RFC 7489 DMARC policy enforcement and RUA telemetry, BIMI brand indicators, and MTA-STS TLS transport policies.
- [DNS Architecture, Anycast & DNSSEC Runbook](https://mayonlinetools.com/hub/dns-architecture-dnssec-zone-runbook/): Recursive resolution trees, BGP Anycast resilience, RFC 1035 BIND zone file syntax, SOA timers, apex CNAME restrictions, and cryptographic DNSSEC chain-of-trust validation.
- [Web Crawlers, Robots.txt & AI Scrapers Runbook](https://mayonlinetools.com/hub/robots-txt-crawlers-ai-indexing-runbook/): RFC 9309 precedence algorithms, AI scraper governance, crawl budget preservation, and the defense-in-depth hierarchy.
- [CORS Architecture & Preflight Runbook](https://mayonlinetools.com/hub/cors-preflight-same-origin-policy-runbook/): Same-Origin Policy boundary, preflight OPTIONS handshake anatomy, credentials wildcard trap, and edge proxy configs.
- [Local In-Browser AI & WebGPU Runbook](https://mayonlinetools.com/hub/local-in-browser-ai-webgpu-runbook/): WebGPU compute pipelines, Chrome Built-In AI (Prompt API & Gemini Nano), Transformers.js ONNX execution, weight quantization (q4/q8/fp16), CacheStorage persistence, and zero-server privacy architecture.
- [Client-Side Computer Vision & Neural Image Processing Runbook](https://mayonlinetools.com/hub/client-side-computer-vision-ai-runbook/): Neural alpha matting (MODNet), Vision Transformers (ViT) paired with GPT-2 for automated WCAG alt-text, Canvas 2D pixel manipulation, RGBA tensor normalization, and zero-data-leakage visual computing with WebGPU.
- [Local NLP & Small Language Models (SLMs) Runbook](https://mayonlinetools.com/hub/local-nlp-small-language-models-guide/): Abstractive document summarization with DistilBART, fine-tuned sentiment analysis with DistilBERT, real-time token streaming with Qwen2.5-0.5B-Instruct, WebGPU acceleration, KV caching, and zero-server privacy architecture.
- [Web Server Redirects, URL Rewrites & Security Headers Runbook](https://mayonlinetools.com/hub/web-server-redirects-security-headers-runbook/): URL redirection semantics (301/302/307/308), Apache mod_rewrite optimization, Nginx return vs rewrite performance, strict HSTS preloading, and CSP 3 header defense.
- [Modern CSS Architecture, Animations & Performance Runbook](https://mayonlinetools.com/hub/modern-css-architecture-animations-runbook/): High-performance GPU compositing, @keyframes physics, SVG Data URI optimization, clip-path geometry, and container queries.
- [Work Hours, Overtime, Timesheets & Project Deadline Estimation Runbook](https://mayonlinetools.com/hub/work-hours-timesheets-deadline-runbook/): Precise work hour tracking, decimal payroll calculation, FLSA 7-minute and tenth-hour rules, overtime law compliance, and project deadline forecasting with calendar working days.
- [Modern Color Spaces & Design Tokens Architecture Runbook](https://mayonlinetools.com/hub/modern-color-spaces-oklch-design-tokens-runbook/): OKLCH vs sRGB and Display P3 wide gamuts, eliminating HSL perceptual lightness distortion, 11-step design token scales (50-950), WCAG 2.2 vs APCA contrast compliance, and Tailwind CSS v4 native @theme tokens.
- [End-to-End API Data Validation: JSON Schema, Zod & SQL Runbook](https://mayonlinetools.com/hub/data-validation-json-schema-zod-runbook/): TypeScript runtime type erasure, JSON Schema Draft 7 & 2020-12 specifications, Zod coercion pipelines, and SQL DDL synchronization.
- [Homebrew & macOS Terminal CLI Master Cheat Sheet](https://mayonlinetools.com/hub/homebrew-macos-terminal-cli-cheat-sheet/): Complete Homebrew package management, cask applications, Apple Silicon architecture paths, services daemon control, and native Zsh terminal mastery.
- [VS Code Keyboard Shortcuts & Workflow Productivity Cheat Sheet](https://mayonlinetools.com/hub/vscode-keyboard-shortcuts-productivity-cheat-sheet/): Dual-platform Windows/Linux and macOS keyboard shortcut matrix, multi-cursor editing, integrated terminal workflows, and JSON configuration tuning.
- [WSL 2 (Windows Subsystem for Linux) Master Optimization & Sysadmin Guide](https://mayonlinetools.com/hub/wsl2-windows-subsystem-for-linux-master-guide/): Complete WSL 2 CLI lifecycle, global .wslconfig memory and processor tuning, 9P filesystem throughput optimization, systemd init management, and virtual disk shrinking.
- [Ollama & Local LLM CLI Master Cheat Sheet](https://mayonlinetools.com/hub/ollama-local-llm-cli-cheat-sheet/): Running open-weight LLMs locally with Ollama, custom Modelfile syntax, REST API curl integration, VRAM offloading, and private zero-telemetry AI execution.
- [Modern Linux CLI Replacements (ripgrep, fzf, eza, bat, zoxide) Master Cheat Sheet](https://mayonlinetools.com/hub/modern-linux-cli-replacements-cheat-sheet/): Supercharge your terminal workflow by replacing grep with ripgrep, ls with eza, cat with bat, cd with zoxide, and find with fzf for 10x developer productivity.
- [Astral uv & Modern Python Tooling Master Cheat Sheet](https://mayonlinetools.com/hub/astral-uv-python-cli-cheat-sheet/): Ultra-fast Rust-powered Python package management, instant virtualenvs, universal cross-platform lockfiles (uv.lock), automated CPython version management, and high-speed Docker builds.
- [Multi-Stage Dockerfile & Container Hardening Runbook](https://mayonlinetools.com/hub/docker-multi-stage-build-hardening-runbook/): Architectural runbook for engineering minimal, secure, and hyper-cached container images with multi-stage builds, non-root execution, and Alpine/Distroless bases.
- [12-Factor App Configuration, Secrets Management & .env Cloud Runbook](https://mayonlinetools.com/hub/twelve-factor-app-env-secrets-management-runbook/): Engineering strict separation between application code and runtime configuration with .env hierarchies, secret masking, and Kubernetes ConfigMaps.
- [Semantic Versioning (SemVer 2.0.0), Package Dependency Ranges & Git Tagging Runbook](https://mayonlinetools.com/hub/semantic-versioning-package-release-git-tagging-runbook/): The definitive guide to software release management, SemVer 2.0.0 rules, caret/tilde range mechanics, Conventional Commits, and automated Git tagging.
- [GraphQL Schema Design, SDL Modeling & TypeScript Type-Safe Architecture Guide](https://mayonlinetools.com/hub/graphql-schema-design-typescript-architecture-guide/): Enterprise master guide to modeling GraphQL SDL architectures, nullability boundaries (!), DataLoader N+1 elimination, and automated TypeScript synthesis.
- [Relational Database Bulk Ingestion, JSON Migrations & SQL Indexing Runbook](https://mayonlinetools.com/hub/sql-database-bulk-insert-migrations-indexing-runbook/): High-throughput database engineering runbook on transforming JSON into parameterized multi-row SQL INSERT statements, conflict handling, and B-tree indexing.
- [CSS Custom Properties, Design Tokens & Fluid Responsive Layouts Architecture Guide](https://mayonlinetools.com/hub/css-variables-design-tokens-fluid-layouts-guide/): Architectural master guide on CSS custom properties, dark mode scopes, Tailwind v4 @theme blocks, CLS-free aspect ratios, and fluid clamp() typography.
- [Scalable Vector Graphics (SVG) Component Engineering & Icon Systems Master Runbook](https://mayonlinetools.com/hub/svg-component-engineering-icon-systems-runbook/): Engineering production-grade vector icon systems with strongly-typed React/Vue components, currentColor token inheritance, and viewBox scaling.
- [Cryptographic Hashes, Checksum Integrity & Software Supply Chain Security Runbook](https://mayonlinetools.com/hub/cryptographic-checksums-file-integrity-supply-chain-guide/): The definitive engineering runbook for cryptographic checksum verification, file integrity validation, Web Crypto hardware hashing, and SLSA supply chain provenance.
- [JSON Web Token (JWT) Security, Signing Algorithms & Token Architecture Runbook](https://mayonlinetools.com/hub/jwt-security-signing-token-architecture-runbook/): Production runbook on RFC 7519 JWT security, symmetric HS256 vs asymmetric RS256/ES256, timing-safe verification, and refresh token rotation.
- [Client-Side Data Ingestion, Base64 Binary Streaming & File System API Runbook](https://mayonlinetools.com/hub/client-side-data-ingestion-binary-streaming-runbook/): Engineering client-side binary data pipelines with ArrayBuffers, TypedArrays, Blobs, magic byte file verification, and object URL memory cleanup.
- [cURL Mastery, HTTP Client Architecture & Modern API Automation Runbook](https://mayonlinetools.com/hub/curl-http-client-api-automation-runbook/): Command-line cURL mastery, HTTP protocol debugging, request lifecycle profiling with --write-out, and automated code translation to Fetch and Axios.
- [JSON Schema, OpenAPI Contract Testing & Runtime Type Generation Master Runbook](https://mayonlinetools.com/hub/json-schema-openapi-contract-testing-runbook/): Enterprise guide to JSON Schema Draft 2020-12, OpenAPI 3.1 convergence, high-throughput Ajv validation, and TypeScript interface compilation.

## Calculators & Financial Tools

- [Percentage Calculator](https://mayonlinetools.com/?tool=percentage-calculator): Calculate a percentage of a value, find what percent one number is of another, and measure percentage change.
- [VAT Calculator](https://mayonlinetools.com/?tool=vat-calculator): Calculate VAT, add tax to a net price, or remove VAT to find the original amount.
- [Aspect Ratio Calculator](https://mayonlinetools.com/?tool=aspect-ratio-calculator): Calculate image and video dimensions while preserving an aspect ratio.
- [Discount Calculator](https://mayonlinetools.com/?tool=discount-calculator): Find the sale price and savings after applying a percentage discount.
- [Exact Age Calculator](https://mayonlinetools.com/?tool=exact-age-calculator): Calculate your exact age in years, months, and days from a date of birth.
- [Compound Interest Calculator](https://mayonlinetools.com/?tool=compound-interest-calculator): Estimate investment growth over time with compound interest and regular contributions.
- [Scientific Calculator](https://mayonlinetools.com/?tool=scientific-calculator): Perform scientific calculations including trigonometric, logarithmic, and power functions.
- [Loan & Mortgage Calculator](https://mayonlinetools.com/?tool=loan-mortgage-calculator): Estimate loan payments and total repayment from principal, interest rate, and term.
- [Random Number Generator](https://mayonlinetools.com/?tool=random-number-generator): Generate random numbers within a chosen minimum and maximum range.
- [Inflation Calculator](https://mayonlinetools.com/?tool=inflation-calculator): Estimate how inflation changes the purchasing power of money over time.
- [Currency Converter](https://mayonlinetools.com/?tool=currency-converter): Convert an amount between currencies using the rates available in the tool.
- [Percentage Change Calculator](https://mayonlinetools.com/?tool=percentage-change-calculator): Calculate the percentage increase or decrease between two values.
- [ROI Calculator](https://mayonlinetools.com/?tool=roi-calculator): Calculate return on investment as an amount and percentage from costs and returns.
- [Prime Number Checker](https://mayonlinetools.com/?tool=prime-number-checker): Check whether an integer is prime and inspect its number properties.
- [Salary Calculator](https://mayonlinetools.com/?tool=salary-calculator): Estimate salary pay amounts and compare compensation over common pay periods.
- [GCD & LCM Calculator](https://mayonlinetools.com/?tool=gcd-lcm-calculator): Calculate the greatest common divisor and least common multiple of integers.
- [Fraction Calculator](https://mayonlinetools.com/?tool=fraction-calculator): Calculate with fractions and view simplified fraction results.
- [Fibonacci Generator](https://mayonlinetools.com/?tool=fibonacci-generator): Generate the sequence of Fibonacci numbers up to a chosen length or limit.
- [BMI & Calorie Calculator](https://mayonlinetools.com/?tool=bmi-calorie-calculator): Calculate Body Mass Index (BMI), Basal Metabolic Rate (BMR), and daily TDEE calorie requirements.
- [Tip & Bill Split Calculator](https://mayonlinetools.com/?tool=tip-bill-split-calculator): Calculate tip amounts, grand totals, and split restaurant bills evenly among any number of people.
- [Profit Margin Calculator](https://mayonlinetools.com/?tool=profit-margin-calculator): Calculate gross profit margin percentage, price markup percentage, and net profit per unit.
- [Break-Even Calculator](https://mayonlinetools.com/?tool=break-even-calculator): Calculate the break-even point in units and revenue from fixed costs, variable cost, and unit price.
- [CAGR Calculator](https://mayonlinetools.com/?tool=cagr-calculator): Calculate the Compound Annual Growth Rate (CAGR) and growth multiple of investments or revenue over time.
- [Car Loan Calculator](https://mayonlinetools.com/?tool=car-loan-calculator): Calculate monthly auto loan payments, total interest, and total vehicle cost after down payment and trade-in.
- [Savings Goal Calculator](https://mayonlinetools.com/?tool=savings-goal-calculator): Calculate the exact monthly deposit required to reach a financial savings goal with compound interest.
- [Date Difference Calculator](https://mayonlinetools.com/?tool=date-difference-calculator): Calculate the exact duration in years, months, days, weeks, and business days between two calendar dates.
- [Work Hours Calculator](https://mayonlinetools.com/?tool=work-hours-calculator): Calculate net work hours, deduct unpaid break minutes, convert to payroll decimal hours, and estimate gross pay.
- [Standard Deviation Calculator](https://mayonlinetools.com/?tool=standard-deviation-calculator): Calculate sample and population standard deviation, variance, mean, median, and standard error from a dataset.
- [Pythagorean Theorem Calculator](https://mayonlinetools.com/?tool=pythagorean-calculator): Solve right-angled triangle hypotenuse, missing leg lengths, interior angles, area, and perimeter.
- [Quadratic Equation Solver](https://mayonlinetools.com/?tool=quadratic-equation-solver): Solve quadratic equations ax² + bx + c = 0 with real or complex roots, discriminant, and parabola vertex.
- [Area & Volume Geometry Calculator](https://mayonlinetools.com/?tool=geometry-calculator): Calculate surface area, volume, and boundary dimensions for cylinders, spheres, boxes, cones, and circles.
- [GPA & Grade Calculator](https://mayonlinetools.com/?tool=gpa-calculator): Calculate collegiate cumulative Grade Point Average on a 4.0 scale with weighted credit hours and honors standing.
- [Fuel Cost & Trip Calculator](https://mayonlinetools.com/?tool=fuel-cost-calculator): Calculate fuel consumption, total trip cost, fuel cost per passenger, and cost per kilometer.
- [Business Days & Working Days Calculator](https://mayonlinetools.com/?tool=business-days-calculator): Calculate business days and working days between dates or add working days with custom weekend schedules and holiday deduction.
- [Mean, Median, Mode & Range Calculator](https://mayonlinetools.com/?tool=mean-median-mode-calculator): Calculate mean, median, mode, range, standard deviation, and variance for any dataset with step-by-step statistical breakdowns.
- [Viewport, PPI & CSS Media Query Calculator](https://mayonlinetools.com/?tool=viewport-resolution-ppi-calculator): Calculate display aspect ratios, PPI pixel density, dot pitch, and responsive CSS media queries for mobile, tablet, desktop, and retina screens.

## Data & Format Converters

- [Color Converter](https://mayonlinetools.com/?tool=color-converter): Convert colors between HEX, RGB, and CMYK formats with synchronized color values.
- [PX to REM Converter](https://mayonlinetools.com/?tool=px-to-rem-converter): Convert pixel values to rem units and rem values back to pixels using a base font size.
- [Advanced Unit Converter](https://mayonlinetools.com/?tool=advanced-unit-converter): Convert common units for length, weight, measurements, and digital data.
- [URL Encoder & Decoder](https://mayonlinetools.com/?tool=url-encoder-decoder): Encode text for safe use in URLs or decode percent-encoded URL content.
- [HTML Entity Converter](https://mayonlinetools.com/?tool=html-entity-converter): Encode special characters as HTML entities or decode entities into readable text.
- [RGB to HEX Converter](https://mayonlinetools.com/?tool=rgb-to-hex-converter): Convert RGB color values to hexadecimal color codes and back.
- [JSON to CSV Converter](https://mayonlinetools.com/?tool=json-to-csv-converter): Convert JSON arrays and objects into CSV data for spreadsheets and data tools.
- [CSV to JSON Converter](https://mayonlinetools.com/?tool=csv-to-json-converter): Convert comma-separated values into structured JSON data.
- [XML to JSON Converter](https://mayonlinetools.com/?tool=xml-to-json-converter): Convert XML documents into JSON data for development and data exchange.
- [SVG to PNG Converter](https://mayonlinetools.com/?tool=svg-to-png-converter): Convert SVG graphics into PNG images for use in documents and applications.
- [Unix Timestamp & Epoch Converter](https://mayonlinetools.com/?tool=unix-timestamp-converter): Convert Unix epoch timestamps to UTC, ISO 8601, and local dates, or human dates to Unix seconds.
- [Time Zone Converter](https://mayonlinetools.com/?tool=time-zone-converter): Convert time and dates between world time zones with daylight saving adjustments and global city matrix.
- [Number Base Converter](https://mayonlinetools.com/?tool=binary-hex-converter): Convert numbers across Decimal, Binary, Hexadecimal, Octal, and Base 36 with nibble grouping.
- [Roman Numeral Converter](https://mayonlinetools.com/?tool=roman-numerals-converter): Convert Arabic numbers to classical Roman numerals and Roman numerals to numbers with math breakdowns.
- [Image to Base64 Encoder](https://mayonlinetools.com/?tool=image-to-base64-converter): Convert image files into RFC 2397 Base64 Data URIs, HTML img tags, and CSS background snippets.
- [Image Format Converter & Compressor](https://mayonlinetools.com/?tool=image-format-converter): Convert images between WebP, JPEG, and PNG with lossy and lossless compression in your browser.
- [YAML to JSON Converter](https://mayonlinetools.com/?tool=yaml-to-json-converter): Convert configuration and data files bidirectionally between YAML and JSON with indentation formatting.
- [HTML to Markdown Converter](https://mayonlinetools.com/?tool=html-to-markdown-converter): Convert raw HTML web page markup and rich text into clean GitHub Flavored Markdown syntax.
- [Number to Words Converter](https://mayonlinetools.com/?tool=number-to-words-converter): Spell out numbers, currency amounts, and decimals into written words in English and Dutch for checks and invoices.
- [Text to Binary Converter](https://mayonlinetools.com/?tool=text-to-binary-converter): Convert plain text into 8-bit binary bytes, ASCII decimal codes, and hexadecimal, or decode binary to text.
- [Binary to Text Decoder](https://mayonlinetools.com/?tool=binary-to-text-decoder): Decode 8-bit binary code (0s and 1s) into plain ASCII and UTF-8 text with delimiter detection and byte stats.
- [Morse Code Translator](https://mayonlinetools.com/?tool=morse-code-translator): Convert text to international Morse code dots and dashes, or decode Morse code to text with audio sound playback.
- [Speed & Fuel Economy Converter](https://mayonlinetools.com/?tool=speed-fuel-economy-converter): Convert vehicle speeds across km/h, mph, m/s, and knots, plus reciprocal fuel economy between L/100km, US MPG, and UK MPG.
- [Cooking & Kitchen Measurement Converter](https://mayonlinetools.com/?tool=cooking-measurement-converter): Convert recipe measurements across cups, tablespoons, teaspoons, grams, ounces, and ingredient bulk densities.
- [PNG to SVG Converter](https://mayonlinetools.com/?tool=png-to-svg-converter): Convert PNG, JPG, and WebP raster images into scalable, resolution-independent SVG vector graphics right in your browser.
- [SVG to CSS & Data URI Converter](https://mayonlinetools.com/?tool=svg-to-css-converter): Convert raw SVG vector markup into URL-encoded or Base64 CSS background-image, mask-image, and Data URI markup.
- [Hours & Minutes to Decimal Hours Converter](https://mayonlinetools.com/?tool=hours-to-decimal-converter): Convert hours, minutes, and seconds to decimal hours (and vice versa) for payroll, timesheets, and billing with optional gross pay.
- [Tailwind CSS & OKLCH Color Palette Generator](https://mayonlinetools.com/?tool=tailwind-css-color-palette-generator): Generate an 11-step color palette (50-950) in OKLCH with WCAG contrast ratios, exported for Tailwind CSS v3, v4, and CSS variables.
- [JSON to JSON Schema Generator](https://mayonlinetools.com/?tool=json-to-json-schema-generator): Convert JSON payloads into standard JSON Schema (Draft 7 and 2020-12) with inferred types and semantic format validation.
- [SQL DDL to TypeScript & Zod Converter](https://mayonlinetools.com/?tool=sql-to-typescript-zod-converter): Convert SQL CREATE TABLE DDL statements into TypeScript interfaces and Zod runtime validation schemas with typesafe nullability.
- [.htaccess & Nginx Redirect Generator](https://mayonlinetools.com/?tool=htaccess-nginx-redirect-generator): Generate production-ready URL redirection rules for Apache (.htaccess) and Nginx web servers.
- [Content Security Policy (CSP) Generator](https://mayonlinetools.com/?tool=csp-header-generator): Build, configure, and validate Content Security Policy (CSP 3) headers visually.
- [HTTP Security Headers & HSTS Generator](https://mayonlinetools.com/?tool=http-security-headers-generator): Generate complete HTTP security header blocks for Nginx, Apache, Cloudflare, and Caddy.
- [SVG Noise & Texture Generator](https://mayonlinetools.com/?tool=svg-noise-texture-generator): Generate procedural SVG noise textures and grain filters with customizable feTurbulence parameters, instant CSS Data URIs, and SVG downloads.
- [.gitignore File Generator & Selector](https://mayonlinetools.com/?tool=gitignore-generator): Generate clean, merged, and commented .gitignore files for Node, Python, Rust, Go, Astro, VS Code, macOS, Windows, and environment secrets.
- [Tool Chain & Pipeline Builder](https://mayonlinetools.com/?tool=tool-chain-pipeline-builder): Chain up to 24 text, JSON, CSV, Base64, URL, and SHA-256 transformations into an automated multi-step pipeline with shareable URLs.
- [Hex to Base64 & Binary Converter](https://mayonlinetools.com/?tool=hex-to-base64-and-binary-converter): Convert between Hexadecimal, Base64, Raw Binary, and UTF-8 strings with RFC 4648 compliance and byte counters.

## Text Processing & Content Utilities

- [Smart Word Counter](https://mayonlinetools.com/?tool=smart-word-counter): Count words, characters, sentences, and reading time in a text.
- [Text Case Converter](https://mayonlinetools.com/?tool=text-case-converter): Convert text to uppercase, lowercase, title case, sentence case, and other formats.
- [Lorem Ipsum Generator](https://mayonlinetools.com/?tool=lorem-ipsum-generator): Generate placeholder Lorem Ipsum text in paragraphs, sentences, or words.
- [Text Diff Checker](https://mayonlinetools.com/?tool=text-diff-checker): Compare two text passages and identify the lines that were added or removed.
- [Slug Generator](https://mayonlinetools.com/?tool=slug-generator): Turn a title or phrase into a clean, URL-friendly slug.
- [Character Counter & Google Snippet](https://mayonlinetools.com/?tool=character-counter): Count text characters and preview how a title or description may appear in search results.
- [Find & Replace Text](https://mayonlinetools.com/?tool=find-replace-text): Find matching text and replace it in a passage, with optional case-sensitive matching.
- [Text Cleaner](https://mayonlinetools.com/?tool=text-cleaner): Clean text by removing unwanted whitespace, formatting, and common text clutter.
- [Text Reverser](https://mayonlinetools.com/?tool=text-reverser): Reverse text characters or the order of words in a string.
- [List Randomizer](https://mayonlinetools.com/?tool=list-randomizer): Shuffle a list of items into a random order.
- [Remove Duplicate Lines](https://mayonlinetools.com/?tool=remove-duplicate-lines): Remove duplicate lines from lists and text data with case-sensitivity, whitespace trimming, and duplicate counts.
- [Alphabetical Line Sorter](https://mayonlinetools.com/?tool=alphabetical-line-sorter): Sort lists alphabetically A-Z, reverse Z-A, by line length, or naturally by embedded numbers.
- [Line Numbers, Prefix & Suffix](https://mayonlinetools.com/?tool=add-line-numbers-prefix-suffix): Add sequential line numbers, custom prefixes, or suffixes to each line of text with customizable zero-padding.
- [Extract URLs & Emails](https://mayonlinetools.com/?tool=extract-urls-and-emails): Extract and isolate all valid web URLs (HTTP, HTTPS, FTP) and email addresses from messy text, HTML, or logs.
- [Word Frequency & Density Counter](https://mayonlinetools.com/?tool=word-frequency-counter): Analyze word frequency distribution and keyword density percentages with stopword exclusion and length filters.
- [Upside Down & Flip Text Generator](https://mayonlinetools.com/?tool=upside-down-text-generator): Flip text upside down (˙ʇxǝʇ uʍop ǝpısdn), reverse strings, or convert to enclosed circled bubble characters.
- [Zalgo & Glitch Text Generator](https://mayonlinetools.com/?tool=zalgo-glitch-text-generator): Generate cursed, corrupted, and chaotic glitch text (Zalgo) by stacking Unicode combining diacritical marks.
- [Strikethrough & Underline Text](https://mayonlinetools.com/?tool=strikethrough-underline-text-generator): Generate cross-platform Unicode strikethrough (t̶e̶x̶t̶), double strikethrough, underline, and wavy lines to paste anywhere.
- [Text Wrap & Truncate Tool](https://mayonlinetools.com/?tool=text-wrap-and-truncate-tool): Wrap long paragraphs to fixed column widths (e.g. 80-col terminal wrap) or crop text to exact character and word limits.

## Developer, Code & Security Utilities

- [Password Generator](https://mayonlinetools.com/?tool=password-generator): Generate a random password with configurable length and character options.
- [QR Code Generator](https://mayonlinetools.com/?tool=qr-code-generator): Create a scannable QR code from text, a URL, or other short content.
- [JSON Formatter & Validator](https://mayonlinetools.com/?tool=json-formatter-validator): Format, beautify, and validate JSON data with clear syntax error feedback.
- [Base64 Encoder & Decoder](https://mayonlinetools.com/?tool=base64-encoder-decoder): Encode text to Base64 or decode Base64 strings back into readable text.
- [MD5 Hash Generator](https://mayonlinetools.com/?tool=md5-hash-generator): Generate an MD5 hash from input text for checksums and basic hash comparisons.
- [SHA-256 Hash Generator](https://mayonlinetools.com/?tool=sha256-hash-generator): Create a SHA-256 cryptographic hash from text in your browser.
- [UUID & GUID Generator](https://mayonlinetools.com/?tool=uuid-guid-generator): Generate universally unique identifiers for applications, records, and testing.
- [User Agent Parser](https://mayonlinetools.com/?tool=user-agent-parser): Inspect a browser user-agent string to identify browser, device, and operating system details.
- [Markdown to HTML Converter](https://mayonlinetools.com/?tool=markdown-to-html-converter): Convert Markdown source text into rendered HTML output.
- [JWT Debugger](https://mayonlinetools.com/?tool=jwt-debugger): Decode and inspect JSON Web Token headers and payloads locally in your browser.
- [Base64 to Image Decoder](https://mayonlinetools.com/?tool=base64-image-decoder): Preview an image encoded as a Base64 data URL and inspect its image output.
- [HTML Minifier & Formatter](https://mayonlinetools.com/?tool=html-minifier-formatter): Format HTML for readability or minify markup by removing unnecessary whitespace.
- [JSON to XML Converter](https://mayonlinetools.com/?tool=json-to-xml-converter): Convert JSON data into clean, well-formed XML documents with customizable root tags, array elements, and indentation.
- [Invisible Character & Zero-Width Detector](https://mayonlinetools.com/?tool=invisible-character-detector): Detect and sanitize hidden zero-width spaces (ZWSP), BOM markers, non-breaking spaces, and ghost Unicode characters.
- [CSS Minifier & Beautifier](https://mayonlinetools.com/?tool=css-minifier-and-beautifier): Minify stylesheet files for production performance or beautify compressed single-line CSS into cleanly indented rules.
- [JavaScript Minifier & Compressor](https://mayonlinetools.com/?tool=javascript-minifier-compressor): Compress JavaScript source code client-side by stripping comments, collapsing whitespace, and optimizing payload size.
- [Regex Tester & Debugger](https://mayonlinetools.com/?tool=regex-tester-debugger): Test and debug JavaScript regular expressions in real-time with flag toggles, index positions, and match breakdown.
- [Cron Expression Explainer & Generator](https://mayonlinetools.com/?tool=cron-expression-generator): Translate cryptic 5-field UNIX crontab schedules into plain English and compose automated cron job schedules visually.
- [SQL Formatter & Beautifier](https://mayonlinetools.com/?tool=sql-query-formatter): Beautify messy, minified, or single-line SQL queries into clean, uppercase, indented database statements.
- [CSS Box Shadow & Gradient Generator](https://mayonlinetools.com/?tool=css-box-shadow-gradient-generator): Visually design Material Design 3 elevation box shadows and linear gradients with live interactive preview and CSS code.
- [Chmod Linux Permissions Calculator](https://mayonlinetools.com/?tool=chmod-permissions-calculator): Convert between Linux numeric octal permissions (755, 644), symbolic strings (rwxr-xr-x), and interactive checkboxes.
- [Subnet & CIDR IPv4 Calculator](https://mayonlinetools.com/?tool=ipv4-subnet-cidr-calculator): Calculate network ranges, usable host IPs, subnet masks, wildcard masks, and broadcast addresses from CIDR blocks.
- [Meta Tag & Open Graph Generator](https://mayonlinetools.com/?tool=html-meta-tag-open-graph-generator): Generate complete HTML head metadata including Google SEO meta tags, Open Graph cards, and Twitter Cards.
- [JSON to TypeScript Interface](https://mayonlinetools.com/?tool=json-to-typescript-interface-converter): Convert raw JSON objects or API payloads into clean, strongly-typed TypeScript interfaces and type definitions.
- [HMAC Hash Generator](https://mayonlinetools.com/?tool=hmac-hash-generator): Generate Hash-based Message Authentication Codes (HMAC-SHA256, HMAC-SHA512) with a secret key via Web Crypto.
- [Keyboard KeyCode & Event Tester](https://mayonlinetools.com/?tool=keyboard-event-keycode-tester): Inspect JavaScript KeyboardEvent parameters, event.key, event.code, and legacy keyCode numbers in real-time.
- [JSON to YAML Converter](https://mayonlinetools.com/?tool=json-to-yaml-converter): Convert JSON objects into formatted, clean YAML configurations with customizable indentation and quoting.
- [Curl to Code Converter](https://mayonlinetools.com/?tool=curl-to-code-converter): Transform cURL commands into clean JavaScript Fetch, Axios, Python Requests, or PHP cURL code snippets.
- [HTML & XML Formatter](https://mayonlinetools.com/?tool=html-xml-beautifier-formatter): Format and beautify minified or unindented HTML, XML, SVG, and RSS markup with custom indentation and tag rules.
- [Bcrypt Hash Generator & Verifier](https://mayonlinetools.com/?tool=bcrypt-hash-generator-verifier): Generate secure Bcrypt password hashes with configurable salt rounds and verify candidate passwords against existing hashes.
- [CSS clamp() & Fluid Typography Calculator](https://mayonlinetools.com/?tool=css-clamp-calculator): Calculate fluid responsive typography and spacing with CSS clamp(). Live viewport slider preview.
- [Markdown Table Generator & CSV Converter](https://mayonlinetools.com/?tool=markdown-table-generator): Create, edit, and convert structured GitHub-flavored Markdown tables from scratch or CSV/spreadsheet data.
- [URL Parser & Query String Builder](https://mayonlinetools.com/?tool=url-parser-query-string-builder): Parse, inspect, edit, and construct canonical URLs and query strings with interactive key-value toggles.
- [Color Contrast & WCAG Compliance Checker](https://mayonlinetools.com/?tool=color-contrast-checker-wcag): Calculate WCAG 2.1 & 2.2 color contrast ratios and relative luminance for AA/AAA compliance across text and UI.
- [JSON Minifier & String Escaper](https://mayonlinetools.com/?tool=json-minifier-string-escaper): Minify JSON to single-line strings, escape quotes for shell and Docker envs, and unescape double-stringified logs.
- [SVG Path Visualizer & Optimizer](https://mayonlinetools.com/?tool=svg-path-visualizer-optimizer): Parse, inspect, and visualize SVG path commands on an interactive coordinate grid with anchor nodes and viewBox calculation.
- [CSS Grid Generator & Layout Builder](https://mayonlinetools.com/?tool=css-grid-layout-generator): Visual CSS Grid layout builder with columns, rows, gaps, and responsive minmax() rules.
- [Password Strength & Entropy Calculator](https://mayonlinetools.com/?tool=password-strength-entropy-calculator): Calculate Shannon entropy in bits, NIST SP 800-63B compliance, and exhaustive GPU crack times.
- [HTTP Status & Headers Inspector](https://mayonlinetools.com/?tool=http-status-codes-header-inspector): Audit HTTP response security headers for HSTS, CSP, and caching compliance, and search RFC 9110 status codes.
- [CSS Flexbox Generator & Playground](https://mayonlinetools.com/?tool=css-flexbox-layout-generator): Visually design responsive CSS flexbox layouts with direction, alignment, wrap, gap, and child sizing rules.
- [IPv6 CIDR Subnet Calculator](https://mayonlinetools.com/?tool=ipv6-cidr-subnet-calculator): Calculate IPv6 subnets, network boundaries, usable addresses, RFC 5952 canonical formatting, and reverse DNS PTR.
- [SPF, DKIM & DMARC Record Generator](https://mayonlinetools.com/?tool=spf-dkim-dmarc-record-generator): Generate and validate RFC 7208 SPF and RFC 7489 DMARC DNS TXT records with 10-lookup evaluation and enforcement policies.
- [CSS Cubic-Bezier & Easing Generator](https://mayonlinetools.com/?tool=css-cubic-bezier-easing-generator): Design custom CSS cubic-bezier animation easing curves with live interactive motion track preview.
- [ULID, UUIDv7 & NanoID Generator](https://mayonlinetools.com/?tool=ulid-uuidv7-nanoid-generator): Generate monotonic sortable ULIDs, RFC 9562 UUIDv7s, and NanoIDs for database B-Tree index performance.
- [DNS Record & BIND Zone Generator](https://mayonlinetools.com/?tool=dns-record-bind-zone-generator): Construct RFC 1035 BIND zone files, SOA serials, and multi-cloud DNS records for A, AAAA, CNAME, MX, and CAA.
- [Docker Run to Compose Converter](https://mayonlinetools.com/?tool=docker-run-to-compose-converter): Convert docker run CLI commands into docker-compose.yml files and compose YAML into docker run one-liners.
- [Robots.txt & Meta Robots Generator](https://mayonlinetools.com/?tool=robots-txt-meta-robots-generator): Generate RFC 9309 robots.txt files, crawl-delay directives, and HTML meta robots tags with AI crawler blocking.
- [CSS Clip-Path Generator & Shape Maker](https://mayonlinetools.com/?tool=css-clip-path-shape-generator): Visually design CSS clip-path shapes with interactive anchor nodes. Generate polygon, circle, and inset rules.
- [CSS Glassmorphism & Backdrop Filter Generator](https://mayonlinetools.com/?tool=css-glassmorphism-backdrop-filter-generator): Design sleek frosted glass UI cards with backdrop-filter blur, customizable opacity, reflection borders, and instant CSS/Tailwind code.
- [CORS Header & Preflight Response Generator](https://mayonlinetools.com/?tool=cors-header-preflight-response-generator): Generate production-ready CORS headers for Nginx, Express, Apache, and Cloudflare Workers with preflight OPTIONS auditing.
- [CSS Keyframe Animation Generator](https://mayonlinetools.com/?tool=css-keyframe-animation-generator): Generate customizable CSS @keyframes animations with real-time visual preview and bezier easing curves.
- [CSS Triangle & Arrow Generator](https://mayonlinetools.com/?tool=css-triangle-generator): Generate pure CSS triangles, carets, and tooltip arrows using transparent borders or clip-path polygons.
- [PDF Merger & Combiner](https://mayonlinetools.com/?tool=pdf-merger): Combine multiple PDF documents into one continuous file directly in your browser with zero server uploads.
- [PDF Splitter & Page Extractor](https://mayonlinetools.com/?tool=pdf-splitter): Split PDF documents and extract specific pages or page ranges locally in your browser with 100% privacy.
- [PNG & JPG to WebP Converter](https://mayonlinetools.com/?tool=png-to-webp-converter): Convert PNG, JPG, and JPEG images to lightweight Google WebP format with quality control and instant file size savings preview.
- [WebP to PNG & JPG Converter](https://mayonlinetools.com/?tool=webp-to-png-converter): Convert modern WebP images back into universally compatible lossless PNG or standard JPG formats with alpha transparency preservation.
- [CSS Blob & Organic Shape Generator](https://mayonlinetools.com/?tool=css-blob-generator): Generate fluid 8-point border-radius organic blobs and shapes with gradients and production CSS.
- [OKLCH Color Converter & Picker](https://mayonlinetools.com/?tool=oklch-color-converter): Convert between perceptually uniform OKLCH, HEX, RGB, HSL, and Display P3 with live sRGB gamut check.
- [CSS Background Pattern Generator](https://mayonlinetools.com/?tool=css-pattern-generator): Generate lightweight pure CSS repeating background patterns like blueprint grids, polka dots, stripes, and chevrons.
- [CSS Neumorphism (Soft UI) Generator](https://mayonlinetools.com/?tool=css-neumorphism-generator): Design tactile Neumorphic Soft UI cards and buttons with custom light vectors, concave/convex surfaces, and dual shadows.
- [CSS Text Shadow Generator](https://mayonlinetools.com/?tool=css-text-shadow-generator): Create multi-layer CSS text shadows with live typography preview for neon glows, 3D lettering, and retro effects.
- [SVG to JSX & React / Vue Converter](https://mayonlinetools.com/?tool=svg-to-jsx-converter): Convert raw SVG markup into strongly-typed React JSX, TypeScript TSX, or Vue 3 Single File Components with camelCase attributes.
- [CSS Aspect Ratio & Embed Calculator](https://mayonlinetools.com/?tool=css-aspect-ratio-calculator): Calculate simplified aspect ratios (16:9, 4:3, 1:1, 21:9), modern CSS aspect-ratio rules, and responsive video iframe embeds.
- [CSS Variables & Design Tokens Generator](https://mayonlinetools.com/?tool=css-variables-generator): Build scalable design token stylesheets with CSS custom properties, light/dark mode paired themes, and Tailwind v4 @theme blocks.
- [CSS Ribbon & Corner Badge Generator](https://mayonlinetools.com/?tool=css-ribbon-badge-generator): Generate pure CSS diagonal corner ribbons and promotional badges with custom angles, colors, and zero image dependencies.
- [HTML Table to CSS Grid Converter](https://mayonlinetools.com/?tool=html-table-to-css-grid): Convert rigid HTML table markup into modern, responsive semantic div layouts powered by CSS Grid and mobile data-label reflow.
- [JSON to Zod Schema Generator](https://mayonlinetools.com/?tool=json-to-zod-schema): Generate TypeScript Zod runtime validation schemas from sample JSON data with smart string inference and strict object rules.
- [TypeScript to JSON Schema Converter](https://mayonlinetools.com/?tool=typescript-to-json-schema): Convert TypeScript interface and type declarations into standard JSON Schema Draft 2020-12 and Draft-07 for OpenAPI and validation.
- [Cron Expression Explainer & Humanizer](https://mayonlinetools.com/?tool=cron-expression-explainer): Translate cryptic 5-field UNIX crontab schedules into clear plain English sentences with field-by-field breakdowns and simulated runs.
- [Semantic Versioning (SemVer) Calculator](https://mayonlinetools.com/?tool=semver-calculator): Calculate next Patch, Minor, and Major release version increments and test dependency range rules (^, ~, *, x) according to SemVer 2.0.0.
- [JSON to SQL INSERT Generator](https://mayonlinetools.com/?tool=json-to-sql-insert): Convert JSON objects and arrays into PostgreSQL, MySQL, and SQLite INSERT statements with quote escaping, conflict handling, and bulk batching.
- [Multi-Stage Dockerfile Generator](https://mayonlinetools.com/?tool=dockerfile-generator): Generate hardened multi-stage Dockerfiles and .dockerignore files for Node.js, Python, Go, Rust, and Static Nginx with non-root security.
- [.env to JSON & YAML Converter](https://mayonlinetools.com/?tool=dotenv-to-json-converter): Convert .env configuration files into strongly-typed JSON, YAML, or shell export scripts with type coercion and secret masking.
- [JSON Diff & Structural Comparison](https://mayonlinetools.com/?tool=json-diff-checker): Deep semantic comparison between two JSON payloads to detect added, removed, and modified values regardless of key ordering.
- [Checksum & Cryptographic Hash Verifier](https://mayonlinetools.com/?tool=checksum-hash-verifier): Calculate SHA-256, SHA-512, SHA-1, and MD5 hashes from text or files via Web Crypto, and verify against expected release checksums.
- [GraphQL SDL to TypeScript Converter](https://mayonlinetools.com/?tool=graphql-to-typescript): Convert GraphQL Schema Definition Language (SDL) types, inputs, interfaces, and enums into strongly-typed TypeScript interfaces.
- [CSV to SQL INSERT Generator](https://mayonlinetools.com/?tool=csv-to-sql-insert-generator): Convert CSV, TSV, or tabular delimited data into SQL INSERT statements with PostgreSQL, MySQL, and SQLite dialect support.
- [Favicon & App Icon Generator](https://mayonlinetools.com/?tool=favicon-ico-generator): Generate multi-size .ico favicons, Apple touch icons, and HTML meta tags from emojis or uploaded images in your browser.
- [cURL to Fetch & Axios Converter](https://mayonlinetools.com/?tool=curl-to-fetch-converter): Convert cURL shell commands into clean JavaScript Fetch API, Axios, Python Requests, and Node.js HTTP request code.
- [SQL to JSON Converter](https://mayonlinetools.com/?tool=sql-to-json-converter): Parse SQL INSERT statements and table dumps into formatted JSON objects, arrays, or key-value maps with type inference.
- [Base64 to File & Image Converter](https://mayonlinetools.com/?tool=base64-to-file-converter): Decode Base64 strings and Data URIs into downloadable binary files with automatic MIME detection, size analysis, and image preview.
- [CSS Mesh Gradient Generator](https://mayonlinetools.com/?tool=css-mesh-gradient-generator): Design modern, organic multi-point CSS mesh gradients using pure radial gradients with interactive coordinate anchors and live CSS output.
- [SVG Pattern & Texture Generator](https://mayonlinetools.com/?tool=svg-pattern-generator): Create seamless repeating vector patterns and background textures with live size, stroke, and color controls in SVG and CSS Data URI formats.
- [JWT Token Generator & Signer](https://mayonlinetools.com/?tool=jwt-token-generator): Generate and cryptographically sign JSON Web Tokens (HS256) via Web Crypto with custom headers, claims, and automatic expiration stamps.
- [JSON to GraphQL Schema Generator](https://mayonlinetools.com/?tool=json-to-graphql-schema): Infer and generate complete GraphQL Schema Definition Language (SDL) types, queries, and mutations directly from sample JSON data.
- [JSON Schema to TypeScript Converter](https://mayonlinetools.com/?tool=json-schema-to-typescript): Convert JSON Schema (Draft-07, 2020-12, OpenAPI) specifications into strongly-typed TypeScript interfaces and type aliases.

## Technical Architecture & Privacy

- **Runtime**: Client-side static architecture powered by Astro, Vue 3, and Web APIs.
- **Privacy Guarantee**: 100% in-browser processing. Computations, hashes, conversions, and files remain strictly within the client device memory.
- **Offline / Edge Readiness**: Ultra-low latency, zero external network dependency for tool computation.
- **Operator & Contact**: Owned and operated by Chris (Netherlands). Direct contact via contact@mayonlinetools.com.