Protect PDF
Add a password to your PDF.
or drop PDF file here
Files are processed in your browser and never uploaded.
How to Protect PDF
- 1
Select your PDF file
Click “Select PDF file” or drag and drop into the box above.
- 2
Choose your options
Enter the password twice and choose what people who open the PDF may do. Add a separate permissions password if needed.
- 3
Download
Run the tool, check the result and save it to your computer or phone. Nothing is ever uploaded.
About Protect PDF
Lock a PDF with a password using AES-256 encryption, and optionally limit printing, copying and editing.
Frequently asked questions
What if I forget the password?
There is no way to recover it: the encryption is designed so the file can't be opened without it. Keep the password somewhere safe.
Are the permission limits secure?
The open password is strong encryption. Print and copy restrictions are honoured by most viewers but can be ignored by some software, so treat them as a deterrent.
Are my files uploaded?
No. Protect PDF runs entirely in your browser: your files are processed on your device and never sent to a server.
Is it free?
Yes. It's free, with no sign-up, no watermarks and no daily limits.
Is there a file size limit?
There's no upload limit, because nothing is uploaded. Very large files are limited only by your device's memory.