Protect PDF

Put a password on a PDF before you share it.

100% LocalFree

Choose a PDF fileor drag and drop it here

How to password-protect a PDF

1 Add a PDF and type the password it should require.
2 Press Protect PDF; the file is encrypted on your device and offered for download.
3 Share the file and the password over different channels, for example the file by mail and the password by phone.
4 Keep the password somewhere safe: without it, the file cannot be opened, by you either.

How strong is the protection?: The file is encrypted with the AES encryption defined by the PDF standard, the same mechanism desktop PDF suites use. The practical strength is your password: a long passphrase beats a short code.
Can the password be recovered if I forget it?: No. There is no backdoor; a forgotten password means the file stays locked. Keep an unprotected copy in a safe place if you need a fallback.
Does every PDF reader ask for the password?: Yes, standard encryption is honored by all mainstream readers: Adobe, browsers, macOS Preview and phone viewers all prompt for it.
Is my file or password sent anywhere?: No. Encryption runs entirely in your browser; neither the document nor the password leaves your device.

Take the password off a document you can already open.

Combine several PDFs into one file, right in your browser.

Make a heavy PDF light enough to send.