Password-protect a PDF
Add a password to a PDF with strong AES-256 encryption, free and right in your browser. Your file is never uploaded. No watermark, no sign-up.
- Runs in your browser: files are never uploaded
- No watermark, no sign-up
- Free to use
What you can do with Protect PDF
- Lock a PDF with a password using strong AES-256 encryption before you share it
- Encrypt the file entirely in your browser, so it is never uploaded to any server
- Choose your own password so only people you trust can open the document
- Get a protected file back that keeps the same pages and content, just password-gated
- Use it free with no sign-up and no watermark added by us
How it works
- 1
Add your PDF
Drop in the file you want to lock. It is never uploaded.
- 2
Choose a password
Type the password people will need to open it, and keep a copy somewhere safe: it cannot be recovered.
- 3
Protect and download
Press Protect PDF. The file is encrypted with AES-256 in your browser.
Protect PDF FAQ
Is my PDF or password sent to your servers?
No. The encryption runs entirely in your browser, so the file never leaves your device and your password is never uploaded. Everything happens locally on your own machine.
What happens if I forget the password?
We cannot recover it for you. Because the encryption is applied in your browser and nothing is stored, there is no reset or recovery option, so keep your password somewhere safe.
How strong is the encryption?
It uses AES-256, the same strong standard trusted for sensitive documents. Anyone without the password will not be able to open the file.
Drag & drop your file here
Private: processed in your browser
Strong AES-256 encryption, applied in your browser. Keep your password safe: we cannot recover it.