Protect PDF
Add a password and AES-256 encryption to your PDFs.
How to password protect a PDF
- 1. Add your PDFsChoose up to 20 PDFs of up to 100 MB each.
- 2. Set a passwordEnter and confirm a password of 8 to 128 characters.
- 3. DownloadSave the encrypted copies. The fields clear as soon as processing starts.
Your files stay on your device. This tool does its work in your browser, and your files are never uploaded.
Common questions
How strong is the encryption?
AES-256. Each output must refuse access without the password, and open and render with it, before you can download it.
What if I forget the password?
It cannot be recovered, so keep it somewhere safe.
Is my password sent anywhere?
No. It is used in your browser, though browser or password-manager extensions may offer to save it.