Protect & Unlock PDF
Add or remove passwords
The essentials
Protect & Unlock PDF adds a password to sensitive documents — or removes protection from PDFs you own — quickly and privately.
How to use it
- Upload the PDF.
- Choose Protect or Unlock.
- Enter the password to add, or the current password to remove.
- Download the processed PDF.
Pro tips
- Use a strong, unique password — short ones are easy to guess.
- Unlocking requires the correct current password; the tool cannot crack unknown passwords.
- Protect files before emailing contracts, invoices, or IDs.
Behind the result
Encryption and decryption run in your browser using standard PDF password protection. Your password is never transmitted anywhere — the math happens entirely on your own device.
A worked example
You must email an ID document securely.
- Input
- An unprotected PDF scan of a passport, plus a strong password you chose.
- Output
- A password-protected PDF that only the recipient can open.