Protect PDF with Password

Require a password to open a PDF using local AES-256 encryption.

✓ Free to use · Runs in your browser · No sign-up

1. Choose your PDF

Your files are processed locally in your browser and are not uploaded to our servers.

Choose a file or drop it here

PDF documents only. Choose a file from your device, or drag it into this box.

Your files stay on your device. Maximum 25 MB per file.

How to use Protect PDF with Password

  1. Choose a PDF from your device. Your files are processed locally in your browser and are not uploaded to our servers.
  2. Choose an unlocked PDF and enter a password twice to avoid typing mistakes.
  3. Protect the PDF, download it, and keep the password somewhere safe.

A closer look

The downloaded PDF is encrypted with AES-256 and requires your opening password. Encryption runs in a local browser worker. Toolzafi does not store the password and cannot recover it. Readers that do not support modern PDF encryption may be unable to open the result.

A practical example

Create a password-protected copy of a report, then reopen the download to confirm it asks for the password. Keep the password separately; Toolzafi cannot recover it.

A useful tip

Use a long, unique password and send it separately from the PDF. Keep an unlocked original somewhere safe.

Good questions. Simple answers.

Can Toolzafi recover a forgotten password?

No. There is no password recovery service. You need your password or an unlocked original.

Explore all pdf tools for related tasks and category-specific guidance, or read how Toolzafi handles your data.

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