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Bookmarks create a clickable outline that appears in the sidebar of standard PDF readers. Readers click an entry to jump straight to that page, making long reports, ebooks, and manuals far easier to move through than scrolling page by page.

Yes. The tool supports hierarchical bookmarks, so you can nest sub-entries under main chapters to build a structured table of contents. Each bookmark points to a specific page, giving your document a clean, organized navigation tree in the reader's panel.

You can add new entries and rebuild the document outline. By default the tool replaces the existing outline with the structure you define, letting you reorganize a messy or outdated bookmark set into a fresh, accurate one for your readers.

They appear in the bookmarks or outline sidebar of any standard PDF viewer, including Acrobat, Preview, and most browsers. Readers open that panel to see your full table of contents and click through to any section instantly.

Yes. The outline is written into your PDF locally in your browser, with no upload to any server. Your document stays on your device the whole time, and the tool is free to use with no signup or watermarks.