Password Protect PDF
Encrypt your PDF with a password. Anyone who opens the file will need to enter the password to view it. Files never leave your browser.
How to password protect a PDF
- Upload your PDF file
- Enter a password and confirm it
- Click Protect PDF
- Download your encrypted PDF instantly
Note: Store your password safely before sharing. There is no way to recover a forgotten password from an encrypted PDF.
Frequently asked questions
How secure is the PDF password protection? ▾
The tool applies AES-256 encryption, the same standard used by banks and governments. A strong, unique password is the most important factor — the encryption itself is extremely robust.
Can I open the protected PDF on any device? ▾
Yes. Password-protected PDFs are a standard format supported by Adobe Acrobat, macOS Preview, iOS, Android, and all major PDF readers. The recipient is prompted for the password when they open the file.
Can I remove the password later? ▾
Yes — use the Unlock PDF tool on this site to remove the password if you know it.
What happens if I forget the password? ▾
There is no recovery option. AES-256 encrypted PDFs cannot be opened without the correct password. Always store your password safely before sharing the protected file.
Does password protection change the file content? ▾
No. The text, images, and layout of your PDF remain exactly the same. Only access to opening the file is restricted by the password.
Related: Unlock PDF · Watermark PDF