Protect PDF
Secure your PDF with a password.
Your files never leave your device No waiting, results in seconds Free, no account needed
or drag and drop here
🔒 Your files never leave your device
How to use
Choose or drop your file
Pick options and start
Download the result
About Protect PDF
Protect PDF encrypts your document with a password. Without it, the contents can't be read — ideal for bank statements, contracts, medical records and HR files.
- 100% free
- Files stay on your device
- No sign-up
- No watermark
- Works on mobile
Frequently asked questions
What if I forget the password?
It can't be recovered, so store it somewhere safe.
Which apps open the protected PDF?
Adobe Reader, browsers and all common PDF apps after entering the password.
Is Protect PDF free?
Yes. Protect PDF is completely free, needs no account and never adds a watermark to your files.
Are my files safe?
Yes. Your file is processed inside your browser on your own device; it is never uploaded or stored.
Can I use it on my phone?
Yes. Protect PDF works in every modern browser on iPhone and Android, no app needed.