Countdown timer

Set it and switch tabs — the remaining time shows in the tab title and it beeps when done. Runs entirely in your browser.

This tool runs entirely in your browser — nothing you type or open here is ever uploaded. You can disconnect from the internet after the page loads and it still works.

Minutes

Seconds

Need more than this page can do?

The PDF Toolbox desktop app compresses, redacts with verified removal, OCRs scans, repairs damaged files, converts to PDF/A and handles 500-page documents — all offline, on your machine, with the same promise: nothing ever leaves it. See everything it does →

More utilities & calculators

🔑 Password generator

Cryptographically random — created on your device, sent nowhere.

⬜ QR code generator

Any link or text to a PNG QR code — private links stay private.

🔍 QR code reader

Decode a QR from a photo — the content stays on your device.

#️⃣ Hash generator

MD5, SHA-1, SHA-256, SHA-512 of text or files; verify checksums.

🎫 JWT decoder

Decode tokens without pasting credentials into someone's server.

🔡 Base64 encode / decode

Text or files to Base64 and back — Unicode-safe, data URIs included.

See all 80 tools →