10 tools · no sign-up · no uploads
Fast developer tools that run entirely in your browser
Small, focused utilities for everyday development work — formatting, decoding, hashing, comparing. Every one runs entirely in your browser, so nothing you paste is ever sent to a server.
Format
Inspect
Convert
- Base64 EncoderEncode and decode Base64, including URL-safe variants and full Unicode.
- URL EncoderPercent-encode or decode URLs, and break one down into its parts.
- Timestamp ConverterConvert Unix epoch timestamps to dates and back, with a live current time.
- Color ConverterConvert between HEX, RGB, HSL and OKLCH, with WCAG contrast checking.
Generate
Compare
Why these tools are different
Nothing leaves your browser
Every tool is pure client-side JavaScript. There is no backend and no database, so pasting a JWT, an API response or a config file here does not transmit it anywhere. Open your browser's Network tab and check — you will see no requests.
Fast, because there is nothing to load
Pages are static HTML with one small interactive component. No framework bundle, no tracking scripts, no cookie wall between you and the thing you came to do.
No sign-up, no limits
No account, no rate limit, no "upgrade to process files over 1MB". These are small utilities and they should just work.