Free, private calculators, converters, and developer utilities in your browser. Instant results with no logins and zero data tracking.
Online by link. Offline by design. Instant, ultra-low latency utilities running entirely inside your local browser sandbox.
Welcome to the MayOnlineTools (MoT) workspace. Online by link, offline by design. Designed for engineers, creators, students, and professionals who require high-velocity utilities with absolute privacy guarantees. All tools run 100% locally on your device via client-side JavaScript, Web Workers, WebAssembly, and WebGPU.
Unlike traditional web utilities that transmit text, API keys, or financial figures to cloud servers for remote processing, MayOnlineTools uses a decentralized client-side model:
In-depth sysadmin cheat sheets, operating system optimizations, and cybersecurity hardening guides from our curated master library.
A complete production engineering runbook for client-side vector precision optimization, multi-density raster favicon generation, Android adaptive maskable icon safe zones, W3C webmanifest configuration, and animated GIF frame decomposition.
A comprehensive architectural engineering runbook for zero-latency client-side digital signal processing (DSP), high-DPI canvas waveform rendering, offline audio rendering, lossless 16-bit PCM WAV encoding, and tempo autocorrelation using standard browser Web Audio APIs.
A production-grade engineering runbook for seamless domain migrations, platform replatforming, and CMS overhauls. Master high-performance Nginx map blocks, Apache .htaccess rewrite rules, crawl budget preservation, and RFC 9309 robots.txt governance to transfer link equity without organic traffic loss.
A definitive technical runbook for search engine results page (SERP) snippet optimization. Learn how Google calculates title truncation boundaries in exact CSS pixels rather than character counts, how to structure rich snippet JSON-LD schemas, and how to engineer meta descriptions that maximize organic click-through rates (CTR).
The definitive engineering and operational runbook for SaaS founders, solopreneurs, and product builders. Decouple Customer Acquisition Cost (CAC), Lifetime Value (LTV), and Net Revenue Retention (NRR). Audit merchant interchange fee friction, minimize involuntary churn from card expiries, and optimize annual billing pricing curves.
A comprehensive financial engineering runbook for independent software developers, consultants, and digital product studios. Master the mathematical models of sustainable hourly rate formulation, billable utilization ceilings, self-employment tax provisioning, cross-border invoicing compliance, and retainer contract structures.
