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Protect PDF

Add password protection to your PDF file.

Your files are secure. We never store your documents.

100% Secure

and private

Fast & Easy

Just a few clicks

High Quality

Original quality

PDF Studios Protect PDF lets you add a password to any PDF and control what others can do with it. You can restrict opening, printing, copying, or editing so only the right people can access the content. It is useful for contracts, financial statements, medical records, and any file you want to keep private. No account or software is required.

Common Use Cases

Secure client contracts and legal documents before sending them by email or through file-sharing services
Protect financial records, invoices, or tax documents from being opened by the wrong person
Prevent unauthorized copying or editing of shared reports, proposals, or research papers
Control permissions so some people can only view and print, but not change the document
Add a password to personal files like journals, medical records, or identification scans before storing them online

How to Password Protect a PDF Online

1

Upload your PDF

Drag and drop the PDF into the tool, or click to select it. The tool accepts all standard PDF types and sizes.

2

Set your password

Enter a strong password. Make sure it is something you can remember or store safely, because PDF Studios does not save passwords.

3

Choose permissions

Decide what others can do. You can allow or block opening, printing, copying text, and editing depending on your needs.

4

Download the protected PDF

Click the Protect button and save the new file. The PDF will now require the password for the actions you restricted.

Frequently Asked Questions

Is the Protect PDF tool free?

Yes. Adding password protection is completely free. There are no subscriptions, watermarks, or hidden fees.

Is it safe and private to protect PDFs online?

Yes. Files are uploaded over HTTPS, processed securely, and deleted within 24 hours. We do not view or keep your documents or passwords.

Do I need to sign up or install anything?

No. Protect PDF runs in your browser. You can use it on any device without creating an account or installing software.

What is the file size or page limit?

There is no strict limit. You can protect large PDFs, though very large files may take a little longer to upload and process.

Related PDF Tools

All files are processed securely and deleted automatically within 24 hours. PDF Studios is free and requires no signup.