Lock PDF

Protect your sensitive documents with industry-standard encryption. Set passwords and granular permissions instantly.

Select your PDF

Drag and drop your file here to add security

Robust PDF Security

Why Lock Your PDFs?

Sensitive data like bank statements, legal contracts, or medical records should never be shared without protection. Our tool allows you to add a "User Password" that anyone must enter to open the file. Additionally, you can set an "Owner Password" to prevent others from printing or copying your content.

Browser-Based Encryption

We utilize the industry-standard **PDF-Lib** encryption engine which runs locally in your browser tab. Your passwords and your document data never leave your computer, providing a level of privacy that traditional server-side tools cannot match.

Security Specs

  • AES 128-bit Encryption: Strong, standard security for your files.
  • Granular Permissions: Control printing and content extraction.
  • Zero Data Storage: No files are uploaded or stored on our servers.