Developer tools · free · no sign-up
Small tools for people who ship websites.
Format JSON, decode a token, explain a cron schedule. Each tool does one job, loads instantly and runs entirely 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
Tools
8 so far, more on the way
- JSON FormatterFormat, validate, minify and sort JSON.
- Base64Encode and decode text, with URL-safe and UTF-8 support.
- URL EncoderPercent-encode, decode and take apart URLs and query strings.
- JWT DecoderRead the header, payload and expiry of a JSON Web Token.
- Timestamp ConverterUnix time to dates and back, in any time zone.
- Cron ExplainerPlain-English meaning and the next run times of a cron schedule.
- Regex TesterTest JavaScript regular expressions with live match highlighting.
- Color ToolsConvert HEX, RGB and HSL, and check WCAG contrast.
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.