Free · Private · No upload
Protect PDF — add a password
Sending a tax return, an ID scan or a contract? Lock it with a password so only people who have it can open it. The encryption happens in your browser, so the unprotected file is never uploaded.
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How to password-protect a PDF
- 1
Choose your PDF
Click the box or drop your file onto it.
- 2
Set a password
Type it twice. Tick Also block editing and copying text to stop changes; printing stays allowed.
- 3
Download
Save the protected PDF. Anyone who opens it is asked for the password.
Why people use PurrPDF
- Strong AES-256 encryption
- Optionally block editing and copying text
- Opens in every PDF reader: Acrobat, Preview, Chrome, phones
- The content stays exactly as it was
- Encrypted on your device — the unprotected file is never uploaded
Questions
How secure is it?
PurrPDF uses AES-256, the strongest encryption in the PDF standard. The protection is only as strong as your password, so choose a long one that’s hard to guess.
I forgot the password. Can you recover it?
No. We never see your file or your password, and there’s no way to recover it. Write it down and keep your original, unprotected file.
How should I share the password?
Use a different channel from the file — for example, email the PDF and send the password by text message.
Are my files uploaded anywhere?
No. PurrPDF runs entirely inside your browser. Your file is opened, changed and saved on your own device. There is no server that receives it — you can even turn off your Wi-Fi and it still works.
Do it in one click next time
Add PurrPDF to Chrome and every tool is one click away — even offline.
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