Protect PDF
Add a password to your PDF file to prevent unauthorized access.
Drop your PDF here or click to browse
PDF files up to 20 MB
How to Password Protect a PDF
Upload PDF
Select your PDF file.
Set Password
Enter a user password.
Download
Download the protected PDF.
About PDF Password Protection
Password-protecting a PDF prevents unauthorized users from opening and reading the file. This is ideal for sensitive documents such as contracts, financial reports, medical records, or confidential business proposals.
Our tool uses 128-bit AES encryption via qpdf, the industry-standard command-line PDF encryption tool. The user password must be entered every time someone opens the document. The optional owner password restricts editing, copying, and printing.
Remember to keep your password safe — we do not store it, and there is no recovery option if you lose it. Your PDF is processed securely and discarded after download.
You may also find our Unlock PDF, Add Watermark to PDF, and Password Generator helpful.
Frequently Asked Questions
What encryption strength is used?
128-bit AES encryption via qpdf — compatible with all major PDF readers.
What is the difference between user and owner password?
The user password controls who can open the file. The owner password controls permissions like printing and editing.
Can I recover a lost password?
No. We do not store passwords. Use our Unlock PDF tool only if you know the password.
Is it safe to protect sensitive documents here?
Yes. Files are processed over HTTPS and deleted immediately after download.
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