Protect PDF
Password-protect your PDF in seconds.
Drop your file here, or browse
PDF — max 50 MB
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How it works
- 1
Upload your PDF file
- 2
Enter the password you want to set
- 3
Download your encrypted, password-protected PDF
Features
- 256-bit AES encryption
- Password required to open the file
- No signup required
- Files deleted immediately after processing
- 3 conversions / day on the free plan
Want to remove the password later? Unlock PDF with the same password
Need to prevent editing without a password? Flatten PDF locks form fields permanently
Adding a visible ownership mark? Watermark PDF stamps your text on every page
Frequently asked questions
What encryption standard is used?
256-bit AES via qpdf, the same encryption standard used by Acrobat and other major PDF tools.
What happens if I forget the password?
We can't recover it. The password is never stored, so keep a copy somewhere safe. Lose it, and the file is unrecoverable.
Can I remove the password later?
Use our Unlock PDF tool with the same password. If you remember it, the protection comes off in seconds.
Can I restrict printing or copying without setting an open password?
Not currently. The tool sets a single password that controls opening the file. Permission-level restrictions, like print-only or no-copy, are on our roadmap.
Does the password work in all PDF readers?
256-bit AES is supported in Adobe Acrobat, Chrome's PDF viewer, Preview on Mac, and all major PDF apps.
Do I need to sign up?
No account required. Guests get 3 encryptions a day; free accounts get 10.
Is there a file size limit?
50 MB per file.
Is my file safe?
Your file is processed in memory and deleted the moment your download starts. The password is never stored.