Password Protect PDF
Encrypt PDF online, unlock protected PDFs you own, or remove known passwords.
Drop files here or click to upload
Max 100 MB
Password protect PDF files, encrypt PDF online, or remove password from PDF files you are authorized to unlock, all in your browser.
Last reviewed: June 2026
How to use this tool
- 1Choose the PDF you want to protect or unlock.
- 2Select the operation and enter the required password information.
- 3Click Process to apply the change locally in your browser.
- 4Download the resulting PDF and test that it opens as expected.
Common use cases
- Add a password before sending a sensitive PDF copy.
- Unlock protected PDF files when you know the password and have permission.
- Prepare controlled document copies for internal workflows.
Technical notes
- Compatibility depends on the encryption method used by the PDF.
- The password is used locally for processing and is not uploaded by this tool.
- Always test the output in your intended PDF viewer.
Private by design
This tool runs in your browser. Your file is not uploaded to our server while using the tool.
Limitations
- This tool cannot bypass passwords you do not know or have permission to use.
- Some modern encryption methods may not be supported.
- Password protection is not a substitute for secure document handling.
Frequently Asked Questions
Can I password protect PDF files free?
Yes. You can password protect PDF files in your browser when the PDF format is supported.
Can I unlock protected PDF files?
Only if you know the password and have permission to unlock the protected PDF.
Is my password uploaded?
No. The password is used locally in the browser for processing.
Should I test the protected PDF?
Yes. Always open the output in your intended PDF viewer before sharing it.
Can I remove password from PDF?
Yes, if you know the current password and the file uses a supported encryption method.