Secure your PDF documents by setting owner and user passwords. Control exactly what others can do: printing, copying, modifying, and more.
Click to select a file or drag and drop
Your files never leave your device.
Leave both passwords empty to decrypt the PDF.
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Select the PDF file you want to protect or modify. If it's already encrypted, you'll need the current password.
Set new user/owner passwords and toggle specific permissions like printing, copying, or editing to your liking.
Click 'Change Permissions' to process your file locally. Your new secure PDF will be ready for download instantly.
Lock your PDF by adding a password.
Remove password protection and restrictions from your PDF documents.
Remove password protection and security restrictions associated with digitally signed PDF files.
Draw, type, or upload your signature.
Remove metadata, annotations, scripts, and more.
The User Password (Open Password) is required to view the document. The Owner Password (Permissions Password) is required to change security settings or override restricted permissions like printing or copying.
Yes! If you have the current password, you can leave the 'New Password' fields blank and process the file. This will decrypt the PDF and remove all restrictions.
Absolutely. Since ZentoPDF runs entirely in your browser, your passwords never leave your computer. We never see, store, or transmit your sensitive information.