Hey everyone!
I'm jinyuan, an indie developer.
I recently launched DevTools Box — a free online toolbox with 75+ developer tools.
What's in the box?
DevTools Box includes tools like: JSON Formatter — beautify and validate JSON Regex Tester — test regular expressions with live matching Base64 Encoder/Decoder — quick encoding and decoding QR Code Generator — generate QR codes instantly Hash Calculator — MD5, SHA-1, SHA-256 and more Color Picker — pick colors and convert between formats ...and 69 more tools!
Why I built it I was tired of jumping between different websites for simple dev tasks.
Each tool runs entirely in your browser — no login, no ads, no data sent to any server.
Tech stack Next.js 14 with App Router TypeScript Tailwind CSS Static export to Cloudflare Pages Try it out Check it out at tdboxs.com.
All tools are 100% free.
Would love to hear your feedback!
What tools would you add?