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Protect PDF

Add password protection to your PDFs, right in your browser.

Protect PDF

AES-256 encryption, entirely in your browser. Keep a safe copy of your password; this tool cannot recover it. Existing digital signatures will not remain valid after encryption.

About Protect PDF

The protect PDF helps you add password protection to your PDFs, right in your browser. It is intended for people preparing documents for reading, sharing or printing. Start with the input and settings shown in the tool above. Review the result before saving or reusing it, especially when converting between formats that support different features. Keep your original so you can compare the output or try another setting.

How to use Protect PDF

  1. Prepare the document — Choose your PDF.
  2. Set up the result — Enter and confirm a password to open the exported file.
  3. Generate and review — Select Protect PDF, save the result and test the password in a PDF reader.

Key features

Frequently asked questions

What does Protect PDF do?

Add password protection to your PDFs, right in your browser

Is it free to use?

The website tool is free to access. Guests receive website credits; signing in unlocks unlimited website credits. Device limits still apply.

Where is my input processed?

Processing takes place in your browser. Local tool inputs are not uploaded to AllNewTools; model or library files may need to download first.

Which browsers can I use?

Use a current browser with JavaScript enabled. Large files, model downloads and advanced file formats may need more memory or specific browser features. Review the result before using it.

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