Edit. Convert. Create. Simplify.
Edit. Convert. Create. Simplify.
Home › Free PDF Tools › Protect PDF
Add a password to your PDF so only people who know it can open it. Protection uses strong AES-256 encryption, and it happens in your browser — your file and password never leave your device.
✓ Free · ✓ No sign-up · ✓ Files stay on your device · ✓ Works on phone and computer
Keep your password safe. We never see or store it, so we cannot recover it or open the file for you if it is lost.
Share contracts, payslips or medical letters that only the recipient should open.
Protect reports and statements you send to your own clients.
Add a password to documents kept on shared computers or cloud drives.
Let people read or print a document while discouraging copying and editing.
Yes. It is free to use, with no sign-up and no watermark added to your file.
No. The tool runs inside your own browser, so your file never leaves your device. Nothing is stored after you close the page.
The file is encrypted with AES-256. Security depends mostly on your password: use a long one that is hard to guess.
We cannot recover it, because we never see it. Keep a copy of the unprotected file somewhere safe.
Yes, in any up-to-date PDF reader that supports AES-256, such as Adobe Acrobat Reader and the PDF viewers built into current browsers. Very old PDF apps may not open it.
Yes, with Unlock PDF, if you know the password.
Remove a password you know from a PDF.
Stamp CONFIDENTIAL, DRAFT or your name on every page.
Make PDFs with photos or scans much smaller.
Combine several PDFs into one file, in any order.
Our team works with confidential documents every day and deletes your files after delivery. Send your file for a free quote.