Encrypt PDF
Set a password required to open the document.
Drag & drop a PDF, or click to chooseOnly .pdf files are accepted
What Encrypt PDF does
- Sets a password that is required to open the PDF.
- Uses AES-256, the strongest encryption PDF supports.
- Works in every common PDF reader: Adobe Reader, browsers, phones.
How to password protect a PDF
- Choose your PDF, or drag it onto the box above.
- Type the password you want.
- Press Encrypt: the protected PDF downloads to your device.
Encrypt PDFs without uploading them
It makes little sense to upload a private document to protect it. Here encryption happens inside your browser, so neither the file nor the password ever leaves your device.
Frequently asked questions
What if I forget the password?
There is no way to recover it — not even for us, because the password is never sent anywhere. Keep it somewhere safe.
How strong is the encryption?
AES-256. With a long password that is not easy to guess, the file cannot realistically be opened without it.
Is it free?
Yes, with no sign-up and no limit.