Tools that do one job well.

Corvo is a small, growing collection of free tools — a JSON formatter, an invoice generator, a QR code generator, and more being added regularly. Each one is built to do a single job properly rather than being one more account you have to create for something that should take thirty seconds.

Why everything runs in your browser

Every tool here — formatting JSON, building an invoice, generating a password, generating a QR code — runs entirely on your own device. Nothing you type, paste, or upload is sent to a server. That's not a marketing line; it's an architectural choice: these pages are built so the tool logic ships to your browser and runs there, full stop. You can check this yourself in any tool — open your browser's developer tools, watch the Network tab, and use the tool. No requests will appear.

The practical upside is real: you can safely use these tools on the kind of data you'd never want to email to a stranger — client addresses on an invoice, a WiFi password, a real password you're about to use. There's no server-side copy of it anywhere, because there's no server involved in generating it.

Why it's free

The site is supported by advertising rather than subscriptions or accounts. There's no premium tier gatekeeping basic functionality — every tool here is fully usable for free, with no artificial limits designed to push you toward paying.

What's here now

26 tools are live today, with 0 more in active development. New tools are added regularly — if there's something specific you wish existed, that's genuinely useful to know.

Get in touch

Found a bug, have a tool request, or just want to say something didn't work the way you expected? Reach out at hello@becorvo.com.