Add Bookmarks to PDF

Automatically generate bookmarks and outlines for your PDF documents. Create a professional table of contents from headings for easy navigation.

Bookmark Generation Options

What does this option do?

This controls which heading levels are detected and converted to bookmarks:

  • All Headings: Creates a comprehensive table of contents with all heading levels
  • H1 Only: Only detects main chapter/section titles (largest headings)
  • H1 and H2: Creates a standard table of contents with main and sub-sections
  • H1, H2 and H3: Detailed navigation with multiple levels (recommended)

Understanding Bookmark Depth

This controls how many nested levels of bookmarks are created:

  • 1 Level: All bookmarks appear at the top level (flat structure)
  • 2 Levels: Main sections and immediate sub-sections
  • 3 Levels: Standard hierarchy with main, sub, and sub-sub sections
  • 4+ Levels: Detailed multi-level navigation for complex documents

For most documents, 3 levels provides the best balance of simplicity and detail.

Font Size Detection

This setting helps the tool identify headings based on their font size:

  • Auto-detect: Automatically determines optimal size thresholds (recommended)
  • 10pt+: Includes very small text that might be headings
  • 14pt+: Typical for normal document headings
  • 18pt+: Only very large text (chapter titles, main headings)

Use "Auto-detect" for best results in most cases.

Pro Tip

For best results, use PDFs that were created from word processors (Word, Google Docs, etc.) rather than scanned documents. The tool works best with text-based PDFs that have proper heading structure.