Protect PDF with Password
Add password protection to your PDF files. For locked PDFs, unlock them first and optionally re-protect. Free, instant, and browser-based. No server uploads — your documents stay private.
Drop files here or browse
Supports PDF — up to 50 MB
Frequently asked questions
Is my PDF uploaded to a server?
No. All password protection happens entirely in your browser. Your PDF never leaves your device.
What type of encryption is used?
We use RC4 128-bit encryption, which is compatible with all major PDF readers including Adobe Acrobat, Preview, and browser-based viewers.
Can I remove the password later?
Once a PDF is password-protected, you will need the password to open it. There is no way to remove the password without the correct password.
Can I also unlock password-protected PDFs here?
Yes. If you upload a password-protected PDF, you will be prompted to enter the password. After unlocking, you can add a new password or download it unprotected.