Protect PDF

The Protect PDF tool adds a password and real encryption to a document, entirely in your browser.

Set an open password, choose what viewers may print or copy, and download a locked file. The password never leaves your device.

How to password-protect a PDF

1. Upload your PDF. It is read locally, never uploaded.
2. Set a password. Type it twice so there are no typos.
3. Choose permissions. Decide whether readers can print or copy text.
4. Encrypt and download. The file is locked and ready to share safely.

Why protect a PDF locally?

Most online "protect PDF" services upload your document to their servers to encrypt it — which means trusting a stranger with the very file you want to keep private. That defeats the purpose.

This tool encrypts on your own machine, so a contract, medical record, or tax form is locked before it ever leaves your hands.

• Private: the file and password stay in your browser.
• Standard encryption: opens in any PDF reader that asks for a password.
• Permission control: allow or block printing and copying.
• No backdoor: only your password unlocks it.

Related PDF tools

Protecting is usually the last step, once a document is finished. Before locking it, the Merge PDF tool can combine the parts into a single file.

To mark the document as confidential first, the Watermark PDF tool stamps text across every page. And to number the pages before you seal it, the Add Page Numbers tool adds a count to each page.

Frequently Asked Questions

Is my PDF or password uploaded anywhere?

No. The file is encrypted in your browser and the password is used only on your device. Neither the PDF nor the password is ever sent to a server.

What kind of protection is applied?

The tool applies standard PDF encryption with a password, the same scheme PDF readers understand. Anyone opening the file will be asked for the password you set.

Can I control printing and copying?

Yes. You can allow or block printing and text copying. These permission limits are enforced by the encryption, not just a polite request.

What happens if I forget the password?

There is no recovery or backdoor. If the password is lost, the file cannot be opened, so store it somewhere safe such as a password manager.

Will the protected PDF open everywhere?

Yes. It opens in any standard PDF reader on desktop or mobile, which will prompt for the password before showing the pages.