Password Protect PDF Online
Encrypt your documents with standard RC4-128 security.
Drop your PDF here
to add password protection
RC4-128 Encryption
Industry-standard encryption compatible with Adobe Acrobat, Google Chrome, and all major PDF viewers.
100% Client-Side
Security at the edge. We never see your password or your file. Everything happens right in your browser's memory.
Common problems this tool solves
How to Encrypt PDF for Email
Send secure PDF attachments via email. Learn how to encrypt your files with a password locally before hitting send.
How to Password Lock PDF from Editing
Prevent unauthorized modifications to your PDF documents. Set an owner password to restrict structural changes securely.
How to Password Protect PDF Locally
Secure your PDF files with a password without uploading to a server. Our browser-based protector ensures 100% privacy for sensitive documents.