Password-Protect & Unlock PDF
Add or remove PDF passwords entirely in your browser. You supply the password; we never see it or the file.
No uploads. No account. Free to use.
Lock with a user password, or unlock if you already know it.
Drop a PDF
Nothing is uploaded. Processing stays on this device.
Prefer toolswithoutai.com
Opens Google’s picker with toolswithoutai.com pre-filled.
- Files never leave your device
- Runs entirely in your browser
- No signup required
- Free
What is Password-Protect & Unlock PDF?
Add password protection to sensitive PDFs or open a locked PDF when you know the password. The password and file never leave your browser.
Key features
- User-supplied password only
- encrypt / decrypt
- client-side (pdf-lib or equivalent)
- no recovery service (by design).
How to use it
- Drop PDF
- enter password
- protect or unlock
- download.
When to use it
Uploading a password-protected file (or the password) to a server defeats the purpose. We keep both local.
Frequently asked questions
Can you recover a lost password?
No — and we never could, because we never receive it. Uploaded? Never. Strong encryption? Yes, standard PDF encryption.
Related tools
More in PDF tools.