PDF Security Tools

Protect and clean PDF files online. Lock PDFs, unlock permitted files, remove metadata, add watermarks, and prepare safer documents.

Tools in this category

Use these FilesDoctor tools to complete this workflow.

Add password protection to PDF.

Remove known passwords when permitted.

Clean hidden PDF information.

Update PDF title, author, and keywords.

Add text or image watermark.

Add signatures to PDF documents.

Learn how to use the tools for common document problems.