Protect PDF

Add a password to your PDF

How to use

Select PDF

Upload the file you want to protect.

Enter Password

Type the opening password and confirm it.

Download

Save the encrypted PDF to your device.

Why CodeGrid Tools?

Your files stay private

Processing runs in your browser. Files are not uploaded to our servers.

Fast and simple

No install required; start instantly in the browser.

English & Turkish

Use the site in English or Turkish—locale follows your preference.

Free to start

Core features are free. No credit card for basic use.

About PDF Encryption

With PDF encryption, you can lock reports and contracts directly in the browser. The password is applied on the client side, and the content is not sent to the server.

It provides a fast layer of protection for business and personal files. It follows the same privacy model as our merge and compression tools.

FAQ

What happens if I forget the password?

The password stays only with you; the platform does not store or recover it. Keep it in a safe place.

Can I change existing password protection?

This tool is designed to add a new user password. Protected PDFs opened in another application must first be unlocked there.

Is 256-bit encryption available?

PDF encryption is applied with pdf-lib by adding a user password, using the standard PDF security model for compatibility.

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What this tool does

PDF password protection adds an open password to reduce casual unauthorized reading—common for personal data or trade secrets. CodeGrid Tools aims to apply encryption steps in your browser so the protected output is produced without the file following a typical upload-to-remote-server path. Strong passwords remain your responsibility. Free daily allowances and Pro are described on the pricing page.

Secure. Secure processing

Your files are processed in your browser and are not uploaded to the server.