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Protect

Encrypt the PDF with an AES-128 password.

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Drag a PDF here, or click to choose

AES-128 · Latin letters/numbers only

How to password-protect a PDF

  1. Drop a PDF file into the dropzone.
  2. Enter a user password (required to open the file) and, optionally, an owner password (leave blank to match the user password).
  3. Click "Set Password" to download the encrypted PDF.

FAQ

Is my file uploaded to a server?

No — everything runs locally in your browser via WebAssembly; your file never leaves your device.

How strong is the encryption?

The PDF is encrypted with AES-128, using Latin letters and numbers for the password.