Protect PDF
Add a password so only people who know it can open your PDF. Free, private and runs in your browser.
About Protect PDF
Protect PDF adds a password to your PDF so that only people who know it can open the file. The pages are rebuilt as images inside an encrypted PDF, so text is not selectable. Your file never leaves your device and the password cannot be recovered if you lose it.
How to use Protect PDF
- Select the PDF you want to protect.
- Type the password twice.
- Click Protect PDF and save the encrypted file.
When is Protect PDF useful?
- Send a private document by email
- Protect a scan of an ID or a contract
- Store sensitive files in shared cloud folders
Frequently asked questions
What encryption is used?
The file is encrypted with a password using the standard PDF encryption built into the PDF format.
Can I recover a lost password?
No. Nobody, including us, can recover it. Keep the password somewhere safe.
Is Protect PDF free to use?
Yes. Protect PDF is free, with no sign-up and no usage limits.
Is my data sent to your servers?
No. The work is done in your browser on your own device, so nothing you use here is sent to our servers.
Privacy and safety
Protect PDF runs entirely in your browser. What you enter or choose never leaves your device and nothing is kept after you close the page.