PTPDF Tools
Password security workflow

Protect PDF with Password Online

Upload one PDF, choose a password, and download a new encrypted PDF that requires the password before opening.

Quick answer

Protect PDF adds password protection to a PDF online. It helps restrict access to sensitive documents before sharing or storage.

Password protectedCreate a secured PDF copy for sensitive files.
Browser basedUpload, protect, and download from one page.
Plan checkedPage count and file size limits are checked before processing.

How to protect a PDF

  1. Upload one PDF file.
  2. Enter a password and repeat it.
  3. Click Protect PDF.
  4. Download the encrypted PDF result.

Limits by plan

  • Guest: up to 10MB and 100 pages.
  • Registered: up to 25MB and 300 pages.
  • Pro: unlimited file size and page count for valid PDF files.