Tools PDF Tools

Protect PDF

Password-protect a PDF.

Password-protect a PDF.

Protect PDF

Drop a PDFFiles stay in your browser when possible

Uses PDF encryption supported by pdf-lib. Keep your password safe — we cannot recover it.

How to Use

Upload or enter your data, then click the button. Many tools run entirely in your browser.

Disclaimer: Informational use only. For PDFs and images, keep originals backed up.

How to use this tool

  1. Enter your values or upload a supported file.
  2. Review options (format, quality, units) if shown.
  3. Click the action button to process.
  4. Download or copy the result. Keep a backup of originals for file tools.

Privacy

Many tools on ProToolHub run in your browser so data may never leave your device. When a tool uses a third-party helper (for example QR image APIs or IP detection), that is noted on the tool page. Do not upload confidential documents to any tool unless you accept the risk.

Disclaimer

Results are for informational and educational purposes only. They are not financial, legal, tax, or professional advice. Verify important decisions with a qualified professional.

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FAQ

Is this tool free?

Yes. Core tools on ProToolHub are free to use in your browser.

Do you store my files?

Browser-based tools process locally when possible. See the Privacy note on this page and our Privacy Policy.

Why did processing fail?

Check file type, size (often ~25 MB max recommended), and that the file is not password-protected unless the tool supports unlock.