PDF Lock

Add password protection to your PDF files. Set an open password so only people with the password can view your document. Works entirely in your browser.

Drop PDF file here or click to upload
Upload a PDF to protect with a password
File Size
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Pages
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Set Password
Confirm Password

All processing happens in your browser. Your PDF and password never leave your device.

Frequently Asked Questions

How does PDF locking work?

Your PDF is encrypted with the password you provide using industry-standard AES-256 encryption.

Can I remove the password later?

Yes, use our PDF Unlock tool with your password to remove the protection.

Is my PDF uploaded to a server?

No. The entire encryption process happens in your browser.

Does it work with all PDFs?

Yes, including PDFs with images, forms, and multiple pages. Already-encrypted PDFs will need to be unlocked first.