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PDF & Documents

Protect PDF with Password

Encrypt a PDF with AES-256 so it needs a password to open, or restrict printing, copying and editing.

  • Runs in your browser
  • Batch
  • Works on mobile
  • In: PDF
  • Out: PDF
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Your files and text are processed on your own device, inside this page. Nothing is uploaded to Dubinity or stored, and closing the tab discards it. How privacy works

About Protect PDF with Password

The file is encrypted in this browser tab with AES-256 (the standard security handler, revision 6) - the same protection Acrobat writes, and one that Chrome, Firefox, Edge, macOS Preview and phone viewers all understand. Your password never leaves the device, which also means nobody can recover it for you if you lose it.

Permission settings (no printing, no copying) are part of the format and are honoured by mainstream viewers, but only the open password is enforced by the encryption itself.

How to use it

  1. 1Add one or more PDFs.
  2. 2Choose a password to open, restrictions, or both.
  3. 3Type the password - it is shown as you type so you can check it.
  4. 4Download the protected file and keep the password somewhere safe.

Questions

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