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.
An end-to-end technical guide to tabular data ingestion, covering RFC 4180 CSV compliance, TSV database exports, GitHub Flavored Markdown table generation, and batch Unix timestamp resolution for distributed logging and observability pipelines.
A deep engineering runbook on modern serialization formats: contrasting TOML tables, YAML hierarchies, RFC 8259 JSON, and streaming NDJSON (JSON Lines) for scalable cloud pipelines, LLM fine-tuning, and container configuration.
A comprehensive security architecture runbook on hardware-backed CSPRNG token generation, Shannon bit-entropy calculations, BIP-39 deterministic key derivation, and modern browser cookie defense mechanisms (CHIPS Partitioned, SameSite, and __Host- prefixes).
An enterprise security engineering runbook for client-side CDN supply chain verification via W3C Subresource Integrity (SRI), X.509 ASN.1 DER certificate decoding, Public Key Infrastructure (PKI) governance, and modern RFC 5208 PKCS#8 private key standardization.
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.
