Short answer: Generate UUIDs (v4 + v7) in bulk, encode/decode URLs, convert Unix timestamps, and more — every tool runs locally in your browser with crypto-grade randomness where it matters, no signup and nothing uploaded.
Developer micro-tools get used dozens of times a day, which is exactly why the usual ones are so annoying: pop-up ads, "sign up for 10 free conversions", and your API keys or tokens passing through someone else's server. These do the same jobs locally — paste, click, copy — with no account and no data leaving your machine.
All free developer tools
UUID Generator
Bulk UUID v4 + v7 with crypto-grade randomness — uppercase, braces, no-hyphen options.
URL Encoder/Decoder
Encode & decode URLs — full or component mode.
Unix Timestamp Converter
Epoch ↔ date, with UTC, ISO and relative time.
JSON to YAML Converter
JSON ↔ YAML with validation and clear errors.
Base64 Encoder/Decoder
Unicode-safe, with URL-safe mode.
More developer tools are on the way — URL encoder/decoder, Unix timestamp converter and JSON↔YAML next.