Drop files here, or click to browse
Max 100 MB · Single file
Why Protect PDF
- PDF encryption requires server-side processing, modern browsers don't expose the necessary primitives reliably.
- Coming when we add a server-side PDF service. Below: a workaround using your OS or a free desktop tool.
Common questions
Is Protect PDF free to use?
Yes. Protect PDF is completely free. There is no sign up, no trial, and no usage cap.
Do I need an account to use Protect PDF?
No. You can start using Protect PDF straight away. We do not ask for an email address or a login.
Is my data uploaded to a server when I use Protect PDF?
No. Protect PDF runs entirely inside your browser, so the PDF files you enter never leaves your device and nothing is sent to us.
Do you store the PDF files I use with Protect PDF?
No. Because everything happens locally in your browser, there is nothing for us to store. Close the tab and it is gone.
Are my PDF files kept private?
Your documents are processed for the task at hand and are not stored or shared. Where possible the work happens right in your browser.
Is there a file size limit for Protect PDF?
Very large files may be slower because the work runs on your device, but there is no hard cap for everyday documents.
How do I use Protect PDF?
Enter or paste your PDF files and Protect PDF updates the result as you go. When it looks right, copy or download it with one click.
Does Protect PDF work on phones and tablets?
Yes. Protect PDF is responsive and works in any modern browser on mobile, tablet, and desktop.
Which browsers does Protect PDF support?
It works in current versions of Chrome, Firefox, Safari, and Edge. For the best experience, keep your browser up to date.
Is there a limit on how often I can use Protect PDF?
No. You can use Protect PDF as many times as you need, at no cost.
Can I use Protect PDF for commercial or client work?
Yes. You are free to use the output in personal, educational, and commercial projects.
Why is Protect PDF free?
The site is supported by advertising, which lets us keep every tool free and open to everyone.
What should I do if Protect PDF gives an unexpected result?
First check that your PDF files is formatted as expected. If something still looks wrong, use the feedback link on the page and we will take a look.