How to add bookmarks to a PDF
To add bookmarks to a PDF, drop your file into Edit Bookmarks. Any outline it already has is listed against the right page; rename entries, re-point them, add new ones or clear the lot, then download a copy — in your browser, nothing uploaded.
To add bookmarks to a PDF, open Edit Bookmarks and drop in your file — free, no signup, and in your browser with nothing uploaded. Whatever outline the PDF already has is read and listed against the page each entry actually lands on. From there you rename entries, re-point them at different pages, add the ones that were missing, or clear the lot, then download a copy with the new outline written in.
How to do it
Open Edit Bookmarks
Go to Edit Bookmarks. It runs in your browser — no account, no install, nothing to upload.
See what is already there
Drop in your PDF. Any existing bookmarks are read and listed, each shown with the page it points to; a PDF with no outline starts you with an empty list.
Edit the list
Rename an entry, change its target page, add new ones with “Add bookmark”, or remove the ones you do not want.
Save and download
Click Save bookmarks. A copy of the document with the rebuilt outline downloads straight away.
What is the difference between a PDF bookmark and a table of contents?
A bookmark is part of the PDF’s outline — the clickable tree a viewer shows in its sidebar, where each entry jumps you to a page. A table of contents is text printed on a page, with or without links. Bookmarks travel with the file as navigation you click from anywhere; a printed contents page is just more content on a page.
Will my bookmarks survive if I merge or reorder the pages later?
No — so add them last. Merging, splitting or reordering rebuilds the PDF out of its pages, and the outline lives at the document level rather than on any page, so it is left behind. Do every structural edit first, then build the outline against the pages as they finally sit. Here is why bookmarks go missing.
Can I keep nested or sub-level bookmarks?
No — the editor is a single flat list. If your PDF had a nested outline, it is flattened to one level and saved flat, and the tool tells you when it has flattened something so that losing the tree is a choice you made rather than a surprise. Every bookmark you save sits at the top level.
Two details worth knowing. Bookmark titles are stored as Unicode, so an entry named in Cyrillic, Greek or accented Latin survives intact — the same characters would turn into question marks if they were drawn onto a page with the standard PDF font, but a title escapes that. And each bookmark jumps to the top of the page you set — a fit-the-page view — so a bookmark that once pointed at an exact scroll position is re-aimed at the top of that page. Saving replaces the whole outline rather than merging into it: blank rows are skipped, and saving with no titles at all clears the outline entirely.
