Over the past few weeks, I built a collection of free, browser-based developer tools. Everything runs client-side with zero backend - your data never leaves your browser.
What is included (380+ tools):
- Text tools: word counter, case converter, diff checker, slug generator
- Encoding: Base64, URL encode/decode, HTML entities
- Crypto: hash generators (MD5, SHA-256, SHA-512), HMAC generator
- Generators: passwords, UUIDs, QR codes, lorem ipsum
- Formatters: JSON, XML, CSS, SQL, YAML
- Network: URL parser, IP lookup, HTTP headers
- Converters: color formats, number bases, timestamps, units
- CSS tools: gradient generators, flexbox playground, border radius
- HTML tools: button generator, iframe generator, meta tag generator
- And many more...
Key features:
- No signup or login required
- No data sent to any server - everything runs in your browser
- Works offline once loaded
- Supports English and Chinese
- Built with vanilla HTML/JS, no frameworks
Tech stack:
Pure frontend - HTML + vanilla JavaScript. Hosted on GitHub Pages. Zero backend, zero dependencies, zero tracking. Every tool is a standalone page that works independently.
Link: https://webtools-cn.github.io/tools-site/
I would love to hear what tools you would find useful or what is missing. Always adding new ones based on feedback!
If you find this useful, consider sharing it with other developers who might benefit from free, privacy-respecting tools.
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