Protect PDF
Lock a PDF with a password using AES-256 encryption.
- Free
- No uploads
- No install
or Drop a PDF file here
Files are processed in this browser and never uploaded.
How to use Protect PDF
- Select the PDF to protect.
- Enter the password twice and optionally restrict printing, copying or editing.
- Click “Protect PDF” and download the protected file.
Frequently asked questions
What if I forget the password?
Passwords are not stored anywhere, so they cannot be recovered. Keep your password somewhere safe.
Which encryption is used?
AES-256 as defined by the PDF 2.0 standard. It opens in Adobe Acrobat, Chrome, Edge, macOS Preview and most modern viewers.
Is my password sent to a server?
No. Encryption happens in your browser, and neither the file nor the password leaves your device.
Related tools
Unlock PDFRemove a known password and lift print/copy restrictions.Merge PDFCombine several PDFs into one file, in any order.Split PDFDivide a PDF into several files by ranges or at regular intervals.Organize PDFReorder, rotate, delete, duplicate and insert pages with live previews.Rotate PDFTurn the whole document or selected pages the right way up.Delete PDF PagesRemove unwanted pages from a PDF cleanly.