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Protect PDF with a Password

Add AES-256 password protection to a PDF and download a separate encrypted copy.

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Choose or drop one PDF, maximum 25 MB.

No file chosen
Password strength: enter a password
Enter the same password again.

Use 8 to 40 characters. The password cannot be recovered if you forget it.

How to use Protect PDF with a Password

  1. Choose one unencrypted PDF up to 25 MB.
  2. Enter and confirm a strong password with at least 8 characters.
  3. Click Protect PDF, then download and test the encrypted copy before sharing it.
A PDF document protected by a closed padlock and password

Why Protect a PDF?

Require a password whenever the protected PDF is opened.
Use AES-256 encryption supported by current PDF readers.
Keep the original PDF unchanged on your device.
Create a separate protected copy with the same pages and dimensions.
Process one PDF up to 25 MB without creating an account.
Receive the protected file immediately after processing.

Privacy and security

The PDF and password are used only for the requested operation. The password is not logged or included in the download name. Keep a safe copy: the service cannot recover a forgotten password.

Who benefits from protecting a PDF?

These are common examples; the right workflow depends on the file, required output, and your organization’s handling rules.

Business teams

Add an opening password before sharing internal reports, proposals, or working documents.

Freelancers

Send a password-protected client copy while keeping the unprotected original stored separately.

Administrative staff

Apply document protection before files move through an approved external workflow.

Individuals

Add a password to personal paperwork before sending it through email or another sharing service.

Frequently asked questions

The downloaded copy uses AES-256 PDF encryption and requires the password you choose when it is opened.

No. The password is not stored, so keep it in a secure password manager and test the download before deleting any other copy.

No. The tool writes a separate encrypted PDF while retaining the document pages and their dimensions.

No. Upload an authorized unprotected copy first. The tool does not remove, bypass, or replace existing protection.

Use at least 8 characters; a longer unique passphrase with letters, numbers, and symbols is safer.

No. Your source file remains unchanged and a new protected PDF is downloaded.