Lock a PDF with a password
Lock a document so only the right people can open it.
Locking a PDF means putting a password on it so it stays shut to anyone who does not have the password. This tool locks the file in your browser, so the document you are securing is never uploaded to do it.
How to lock a PDF
- 1
Add your PDF
Drop in the file you want to lock.
- 2
Choose a password
Set the password that will be required to open it.
- 3
Lock and download
Save the locked PDF, encrypted on your device.
Why lock a PDF locally
A tool that locks your PDF in the browser never receives the unlocked file, so there is no moment where your document sits unprotected on someone else’s server.
Frequently asked questions
What does locking a PDF do?+
It adds an open password, so the file cannot be viewed without it. You can also restrict actions like printing and copying.
Is my file uploaded to lock it?+
No. The lock is applied in your browser and the file never leaves your device.
Can I unlock it later?+
Yes, if you know the password you can remove it with the Unlock PDF tool.
Is it free?+
Yes, with no account.