Protect PDF
Password-protect your PDF with 128-bit encryption. Powered by Ghostscript.
Free No signup Secure processing
Drop a PDF file here or click to browse
Select files from your computer
One file at a time
Uses 128-bit AES encryption via Ghostscript. Files are deleted from server immediately after processing.
How to use Protect PDF
- 1Add a PDF file.
- 2Choose a strong password.
- 3Protect and download the encrypted PDF.
Why use this tool?
- Free online PDF tool with no registration.
- Works in a modern browser on desktop, tablet, and mobile.
- No watermark added to your finished file.
Privacy note
This tool uses secure temporary server-side processing for heavier PDF work. Files are processed only for the requested action and are not kept as user accounts or permanent storage.
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Step-by-step guide
How to password-protect a PDF before emailing
See practical instructions, privacy notes, and answers to common questions.