Protect PDF online — free
Encrypt your PDF with a password
No sign-up required. Drop your files and download in seconds.
Upload a PDF or image and set a password.
Choose files or drag them here
Photos up to 100 MB · other files up to 25 MB · ⌘V / Ctrl+V
What is Protect PDF?
Protect PDF adds AES encryption so only people with the password can open your document.
How to protect pdf online
- 1
Upload your PDF.
- 2
Enter a password.
- 3
Download the protected PDF.
Frequently asked questions
What encryption is used?
256-bit AES encryption via industry-standard PDF encryption.
Can I set separate owner password?
The same password is used for opening; Pro users can set owner passwords in the library.
Is protection free?
Yes on our conversion server — free with instant download.
Prefer instructions? Follow a step-by-step PDF guide.
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Want to keep your PDFs in a web library? Sign in to save your files.
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