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PDF & Image Tools

Protect PDF

Add a password to your PDFs with 256-bit AES encryption. Your files and your password never leave your device. Everything happens in your browser.

Drop your PDFs here

Up to 50 PDFs to password-protect

Protect PDF

Why password-protect a PDF?

Some PDFs aren't meant for everyone: bank statements, contracts, payslips, medical records, tax returns, scans of your ID. The moment one of those leaves your hands in an email or a shared drive, anyone who gets the file can read it. A password fixes that: only someone who knows it can open the document. This tool locks your PDF with 256-bit AES encryption, the same standard banks and governments rely on. You set a password, and from then on the file asks for it every time it's opened. There are no separate "allow printing" or "block copying" switches here; it's one clean lock on the whole document. Know the password, open the file. Crucially, the lock is applied in your browser. Your PDF and your password are never uploaded to a server, so you're not trusting a stranger's website with the very file you're trying to keep private.

How do I add a password to a PDF for free?

Open your PDF, type a password, and download a copy locked with 256-bit AES encryption that asks for that password every time it's opened. It all happens in your browser, so the file and the password are never uploaded.

100% private No watermarks Free forever

Frequently asked questions

How strong is the encryption?
Your PDF is encrypted with 256-bit AES (the same encryption standard used by banks and governments). Without the correct password, the contents simply can't be read.
Are my file and password uploaded anywhere?
No. The PDF is encrypted entirely in your browser, and the password never leaves your device. Nothing is sent to a server. That's the whole point of protecting it here rather than on a site that uploads your file.
What if I forget the password?
There's no backdoor and no recovery. Strong encryption means a lost password makes the file unreadable, even to us. Save it somewhere safe before you share the PDF.
Can I stop people from printing or copying the text?
This tool adds a single password that's required to open the document; it doesn't apply separate print, copy, or edit restrictions. Once someone has the password, they have full access to the file.
Can I protect several PDFs at once?
Yes. Add a batch and each file is encrypted with the password you set, then downloaded back to you, all in the browser.
Do I need to remove the password later?
If you have the password and want a normal, unlocked copy, you can strip it back off any time. Unlock a PDF

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