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Protect files in your browser

Protect PDF

Add a password to your PDF and download the protected file easily.

  • Secure Protection
  • Fast Processing
  • Mobile Friendly
  • Easy Download
  • Content Preserved

Upload and protect your PDF

Drop your PDF file here

Drag & drop a PDF to get started, or click to browse.

Accepted type: PDF

No file selected

Upload a PDF to continue.

File size -
Output name -

The tool adds ".pdf" automatically if needed.

This tool only adds password protection. It does not edit page content, images, or text.

Password strength guidance

Add at least 8 characters. A mix of letters, numbers, and symbols is best.

Ready to protect

Upload a PDF and set a password to begin.

Waiting 0%
Download Protected PDF

If your browser previews the file first, use your browser save or share option to keep the protected PDF.

About Protect PDF

Add password protection to PDF files so only authorized people can open them. Keep contracts, financial records, and personal documents secure.

Protect PDF features

When to use Protect PDF

Add access protection before sending financial, personal, or business documents.

How to use Protect PDF online

  1. Step 1. Upload your file using the drag-and-drop area above.
  2. Step 2. Adjust any settings, then start processing.
  3. Step 3. Download your result instantly — free, with no watermarks.

Check the downloaded result

PDF encryption restricts opening the file but cannot prevent an authorized viewer from photographing or redistributing visible content.

File privacy and processing

This tool processes your file locally in your browser. The source document is not uploaded to PDFHill for processing, although your browser may download the tool libraries needed to perform the task. Read our file safety overview.

Frequently asked questions

How do I password-protect a PDF?

Upload your PDF, set a password, and download the protected copy.

Is password protection done in the browser?

Yes. Protect PDF encrypts your file locally before download.

Helpful guides

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