100% Private (Local Processing)
Password Protect PDF Online
Encrypt your PDF documents with a secure password client-side using browser-based crypto standard.
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How to use Protect PDF
- 1
Select and upload the PDF file you wish to lock.
- 2
Enter your chosen User Password (required to open and view the PDF).
- 3
Optionally, set an Owner Password for additional editing restrictions.
- 4
Click 'Encrypt & Protect PDF' to secure the file and download.
Capabilities
- Stamps standard password protection onto any PDF
- Secure client-side 128-bit encryption processing
- Distinct inputs for User (viewing) and Owner (permissions) passwords
- Ensures secure document sharing with no cloud upload required
Privacy & Processing
This tool operates in a sandbox directly inside your web browser. All parsing, processing, and downloads are rendered locally. Your file size, metadata, and contents never cross the network. It works completely offline.
Frequently Asked Questions
Can this password be bypassed easily?
No. The output PDF uses industry-standard encryption. Standard PDF viewers will require the user password to open and render the document contents.