Add Bookmarks to a PDF

How it works

How do I add a bookmark?

Click any page thumbnail to add a bookmark pointing at that page, then type a name for it in the list below. Add as many as you like.

Will this replace bookmarks the PDF already has?

Yes — this tool writes a fresh outline, so if the PDF already had bookmarks, downloading will replace them with the ones you just created.

Can I create nested bookmarks (sub-chapters)?

This tool creates a flat, top-level outline — each bookmark points straight at a page. Nested sub-bookmarks aren't currently supported.

Can I reorder bookmarks after adding them?

Yes — remove and re-add them in the order you want, using the list controls shown once you've added more than one.

Will my bookmarks show up in any PDF reader?

Yes — bookmarks are written as a standard PDF outline, so they'll appear in the sidebar/navigation panel of Acrobat Reader, browser PDF viewers, and most other readers.

Can I see or keep the bookmarks a PDF already has, and just add a few more?

No — this tool doesn't read or display the PDF's current outline, so you're building the list from scratch. If you want to keep some of the original bookmarks, check what's there first with Split PDF by Bookmarks (it lists the existing outline before splitting), note the titles and pages, then re-add them here alongside your new ones before downloading.

Can I fake a hierarchy, like sub-bookmarks under a chapter, since nesting isn't supported?

Not structurally, but a naming trick works well in the outline panel: use consistent prefixes, like "2. Chapter Two" followed right after by "2.1 Setup" and "2.2 Usage". They all sit at the same flat level, but the numbering makes the grouping obvious to anyone browsing the sidebar.

Does it pull bookmarks automatically from my PDF's headings or table of contents?

No — every bookmark is added manually: click a page thumbnail, type a title, repeat. There's no heading detection, which is actually more reliable for scanned PDFs or files where headings aren't tagged properly — you decide exactly what gets bookmarked and what it's called.