Password Protect PDF
Add password protection to your PDF files. Free, no signup required.
Drag & drop your file here or click to browse.
Accepted: PDF — Max size: 50MB
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How to Protect a PDF
Upload your PDF, enter a password, and click Protect. The resulting PDF will require the password to open. We use AES-128 encryption to secure your document. The password is never stored on our servers — only you know it.
Why Password Protect PDFs?
Password protection prevents unauthorized access to sensitive documents like contracts, financial records, medical files, and personal information. It's a simple way to add a layer of security before sharing documents via email or cloud storage.
Frequently Asked Questions
PDF standard encryption (AES-128). This is compatible with all modern PDF viewers.
Yes, use our Unlock PDF tool with the password you set to remove the protection.