Protect PDF

Encrypts the document with AES-256. Because everything runs in your browser, the password itself never leaves your machine — something no upload site can claim. Don't lose it: there is no recovery, which is the point.

This tool runs entirely in your browser — the file is never uploaded. You can disconnect from the internet after the page loads and it still works.

Drop files here or click to choose

One PDF file

Password

Confirm password

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 →