Vellum opens the table of contents of a PDF document and makes it editable: every bookmark can be renamed, pointed at another page, indented one level, moved or deleted. A document with no outline starts from an empty list, to which you add your own entries until you have a clickable plan — useful on a report, a dissertation or a contract running to dozens of pages. The saved file keeps its text, images and fonts untouched: only the bookmark tree is rewritten. Reading and writing both happen on your own device, and the document is never sent to a server.
A document with no bookmarks starts from an empty list: add your own entries, each with a title and the page it points to, until you have a clickable outline.
Yes, every bookmark can be renamed, pointed at another page, indented one level, moved or deleted; the document’s text, images and fonts stay untouched.
No, reading and writing the bookmarks both happen on your own device; the document is never sent to a server, and the tool is free.
Bookmarks live in the reader’s side panel: they are there to navigate, but they do not print and do not appear in the document. A table of contents is a real page added to the file, printed with the rest. The two complement each other, and Vellum has a tool for each.
Yes. Each entry carries an indent level, and an indented entry becomes the child of the one above it. That is how you build a hierarchy — parts, chapters, sections — which the reader shows as a collapsible tree.
Because their destination cannot be read in the source file: a purely decorative bookmark, an external link, or a target broken by the program that produced the PDF. Rather than lose the title, Vellum keeps it and points it at the first page. You can then fix the target page by hand.
Vellum — free PDF tools whose processing stays on your device.