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Shane Burrellleft a comment
I built JSON Knife because I was tired of Googling "json formatter online" and landing on sites with 47 ads, three cookie popups, and a layout from 2008. So I made the tool I wanted: fast, dark, clean. Then I kept adding more — regex, SQL, cron, Docker Compose, Mermaid diagrams, JWT decode, Tailwind migration. It's now 30 tools and I keep adding more. Everything runs client-side in your...
JSON Knife30 free developer tools. No ads, no signup, no BS.
A fast, clean toolkit for developers: JSON formatter, validator, diff, converters, regex tester, SQL formatter, JWT decoder, cron generator, Docker Compose builder, Mermaid editor, Tailwind v3→v4 migrator, and 18 more. Runs entirely in your browser — nothing leaves your machine.
JSON Knife30 free developer tools. No ads, no signup, no BS.