codetools.run
Free developer tools that run entirely in your browser
What is codetools.run ?
codetools.run is a collection of 47+ developer utility tools that run entirely in your browser. No signups, no server calls, no data leaves your machine. Format JSON, debug JWTs, test regex, generate UUIDs, convert timestamps, minify CSS/JS, encode Base64, generate QR codes, build CSS gradients, and much more. Every tool is free, fast, and privacy-first. Your data stays in your browser. Always. Built with Next.js, open to feedback. New tools added regularly.
From the website
68+ free developer tools: JSON formatter, Base64 encoder, JWT debugger, regex tester and more. All tools run 100% client-side in your browser.
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