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✓ 100% Free🔒 Files Stay On Device✦ No Watermark🛡 AES-256

Encrypt PDF Add Password Protection

Password-protect your PDF with AES-256 encryption — the same standard used by banks, governments and financial institutions. No upload, no watermark.

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Drop your PDF here

or click to browse — max 200 MB

0 / 1 filesMax 200MB per file

Frequently Asked Questions

AES-256 encryption compliant with PDF 2.0 / ISO 32000. This is the same standard used by Adobe Acrobat.
The user (open) password is required to open the document. The owner password controls permissions — who can print, copy or edit. You can set only the user password and let Doclair generate a random owner password.
No — PDF permissions only apply to password-protected documents. Without a user password, anyone can open and ignore permissions.
Never. pdf-lib runs entirely in your browser. Your file and password never leave your device.
Yes. AES-256 encrypted PDFs are supported by Adobe Reader, Preview on Mac/iOS, Chrome PDF viewer, and all modern readers.