Free · AES-256 · Processed on your device

PDF Password Protector

Encrypt a PDF with an AES-256 opening password entirely in your browser; files are not uploaded.

Drag and drop your file hereor browse from your device
PDF · maximum 50 MiB. The file stays in this browser.

Choose a unique password and share it separately from the PDF. If you lose it, the encrypted file may not be recoverable.

How to use PDF Password Protector

  1. Enter the information requested for pdf password protector.
  2. Review inputs and units, then run the tool.
  3. Check the result and copy or download it for your workflow.

How PDF Password Protector works

Encrypt a PDF with an AES-256 opening password entirely in your browser; files are not uploaded. Results are based only on the inputs you provide. This tool does not access or verify private account, search ranking or analytics data.

Use the result carefully

Check output against the source data and destination platform requirements. Estimates and previews are not official measurements or professional advice. For regulated, financial, health or safety decisions, confirm assumptions with an appropriate qualified source.

Example input

Select a PDF and set an opening password

How do I use the pdf password protector?

Enter the relevant inputs and select Run. Encrypt a PDF with an AES-256 opening password entirely in your browser; files are not uploaded.

Is input uploaded?

Processing takes place in your browser. This tool does not send your input or selected files to a conversion API.

Related tools and guides

Practical guides for this tool

Browse all developer tools