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I built ZeroServer.tools. It is a suite of 342 free tools for developers.
Many tools use a backend. Your data goes to their server. This is a risk with API keys or private JSON.
My tools run 100% in your browser. Nothing you type leaves your device.
I used a static export. There are no server calls. No API routes. No database.
Modern browsers do the work. I used these native features:
- Web Crypto API for hashing.
- FileReader and Canvas for image processing.
- WebAssembly for PDF tools.
The stack:
- Next.js and React 19.
- Tailwind CSS.
- Cloudflare Pages.
Top tools:
- JSON Formatter.
- Image Compressor.
- PDF tools.
- Hash generators.
- Base64 converters.
Privacy matters. Your files stay with you.
Check it out at zeroserver.tools.
Tell me what is missing. Tell me if a tool feels wrong.