Developer tools · free · no sign-up
Small tools for great developers.
Format JSON, decode a token, explain a cron schedule. Each tool does one job and loads instantly. Everything stays in your browser.
We will work out what it is and open the right tool.
- Runs in your browser
- No tracking, no cookies
- Works on phones
Popular tools
- JSON FormatterFormat, validate, minify and sort JSON.
- Base64Encode and decode text, with URL-safe and UTF-8 support.
- JWT DecoderRead the header, payload and expiry of a JSON Web Token.
- Timestamp ConverterUnix time to dates and back, in any time zone.
- Regex TesterTest JavaScript regular expressions with live match highlighting.
- Hash & HMACMD5, SHA-1, SHA-256, SHA-384, SHA-512 and HMAC for text and files.
How it works
Local by design
Every tool is plain JavaScript that runs on your device. There is no server step, so tokens, payloads and secrets are never uploaded.
Fast to reach
One page per tool, no accounts, no pop-ups. Open the page, paste, copy the result.
Built to be bookmarked
Light and dark themes follow your system. Pages are small enough to load on a bad connection.