PDFbolt — Free online PDF tools

Protect PDF

Add a password to open or change the file.

Sensitive documents should not be readable by anyone who happens to receive the file. Protecting a PDF with a password encrypts it so only people who know the password can open it.

Set a strong password, and PDFbolt produces an encrypted copy you can share with confidence.

How to password-protect a PDF

  1. Choose the PDF you want to protect.
  2. Enter the password that will be required to open it.
  3. Run the tool.
  4. Download the password-protected PDF.

Frequently asked questions

What if I lose the password?

The document cannot be opened or recovered without it, so store it safely.

How should I share the password?

Send it separately from the file, for example by message or phone.

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