Password protect a PDF
Add a password so only people who know it can open your PDF. Free and private.
PDFDrop your file herePDF
Runs in your browser. Your file isn’t uploaded. 3 of 3 free files left today.
How to use Lock PDF
- Step 1Choose your PDF.
- Step 2Type a password twice.
- Step 3Download the locked PDF.
Lock PDF questions
Is Lock PDF free?
Yes. Every tool is free for 3 files a day, with no sign-up. Premium removes the daily limit.
Is my file safe?
Your file is processed inside your browser and is never uploaded.
Can you recover a forgotten password?
No. We never see your password, so keep it somewhere safe.