PDF Protect
Add password protection and encryption to PDF documents — secure sensitive files in seconds.
Drop PDF to Protect
Add password encryption to your PDF
How it works
A compact workflow from input to download.
Upload PDF
Select the PDF document you want to protect. Any PDF file size is supported.
Set Password
Enter a strong password. Optionally restrict printing, copying, or editing permissions.
Download Protected PDF
Get your encrypted PDF instantly. Recipients will need the password to open it.
Frequently asked questions
How strong is the encryption?
Can I restrict printing or copying?
Can I remove the password later?
Is my PDF uploaded to a server?
What happens if I forget the password?
Securing Sensitive Documents
When sharing financial records, HR documents, or intellectual property over email or cloud storage, adding password protection is a necessary security measure. PDF encryption scrambles the internal content of the document using the AES (Advanced Encryption Standard) algorithm. Without the correct password, it is mathematically impossible to read the text or view the images within the file.
Client-Side Encryption
The most vulnerable moment for a sensitive document is when it is being uploaded to a web server to be encrypted. Our tool eliminates this risk by performing the AES encryption entirely within your browser using JavaScript cryptography. Your unencrypted document and your password are never transmitted over the internet, providing enterprise-grade security for your files.
Related tools
Continue the workflow with adjacent tools.