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?
Top comments (1)
Keeping JSON formatting, regex testing, and hash calculation entirely in the browser is the right trust boundary for the kinds of snippets developers paste into utility sites. The Next.js 14 static export on Cloudflare Pages also fits that promise by keeping deployment simple and the tools fast. I'd clearly label MD5 and SHA-1 as legacy choices, then make search, keyboard access, and locally stored recent tools first-class features. Once the collection reaches 75+, discovery and confidence matter more than adding the 76th tool.