Open source · MIT · zero-dependency tool cores
Free tools, made with zeal.
No sign-ups, no watermarks, no nonsense. Every tool usable three ways: UI · REST API · MCP.
All tools
- Background RemoverCut the background out of any photo, without uploading it anywhere.UI
- Chord TransposerChange the key of any chord chart — lyrics untouched.UIAPIMCP
- Countdown TimerCount down to a date, or to Christmas, Easter and New Year.UI
- EXIF ViewerSee what your photos reveal — then remove it without touching a pixel.UI
- Favicon GeneratorTurn a logo into every icon a site needs, without uploading it.UI
- Image CompressorShrink and convert images in your browser — no upload, no watermark.UI
- Invoice MakerWrite an invoice, print it as a PDF, and keep your details for the next one.UI
- Meta Tag CheckerSee what your page looks like on Google, X, Facebook, LinkedIn and Slack.UIAPIMCP
- Name PickerSpin a wheel to pick a random name, winner or team — fairly, in the browser.UIAPIMCP
- Password GeneratorStrong passwords, generated in your browser and never sent anywhere.UIAPIMCP
- QR Code GeneratorFree QR codes — no sign-up, no watermark, no expiry.UIAPIMCP
- Send to DeviceYour devices find each other, then the file goes straight between them.UI
- Stage TimerA countdown the speaker can read from the back of the room.UI
- TunerTune a guitar, bass or ukulele by ear or by microphone, in the browser.UI
- Worship PadsAmbient pads in every key, generated live in your browser.UI
- Request a toolYour requests write our roadmap
The Zeal Promise
Non-negotiable, on every tool we ship.
- No sign-up — ever
- No watermarks on any output
- No ads near the download button
- Works fully on mobile
- Privacy-first: processing stays in your browser
- Open source (MIT) — audit it, contribute, self-host
- Zero runtime dependencies in tool logic
Free REST API — no keys
Every tool is a pure function, so every tool is an endpoint. No API key, no sign-up.
curl -X POST https://zeal.tools/api/v1/qr \
-H 'content-type: application/json' \
-d '{"data": "https://zeal.tools"}'MCP server
Point any MCP client — Claude, IDEs, agents — at our endpoint and use every tool from your AI workflow.
{
"mcpServers": {
"zeal-tools": { "url": "https://zeal.tools/mcp" }
}
}Why this exists
I got tired of it. You search for a tool that should take ten seconds, and you land on a page that wants an account before it will do anything. You make the account, and now the result has a watermark. You close three ad overlays to find the download button, and it is next to two more that are not download buttons.
So these are the tools I wanted to exist — built for myself, and used daily. That is the whole filter: if I would not reach for it in the middle of my own work, it does not get built. It also explains what is missing. No sign-up, because I never wanted one. No watermark, because I would not accept one. No ads near the download, because that is the exact moment every other site chose to get in my way.
Everything runs in your browser wherever it possibly can, and it is all MIT licensed — so if I ever stop maintaining this, you can take it and run it yourself.
Built by zernonia
github.com/zernonia →