PDF Bookmark Editor

Why PDF Bookmarks Matter

PDF bookmarks, also known as outlines, appear in the sidebar of PDF viewers and act like a table of contents. They help readers jump to chapters or sections in long reports, academic papers, e-books, and manuals without scrolling page by page.

The Problem with Current Tools

Many PDFs are exported without bookmarks. Desktop PDF editors can add them later, but a title-and-page-number workflow is often enough when you only need a flat outline for chapters or sections.

Many online PDF services focus on merge, compress, split, and conversion tasks, and some do not provide a lightweight outline editor. This tool fills that niche by adding navigation entries from plain text without installing desktop software.

Our Solution

Enter each bookmark as a line in the format "Title,Page Number" and the tool adds outline items to your PDF. If a title contains commas, the last comma is used as the page-number delimiter, and page numbers are checked against the PDF page count. Built with pdf-lib for client-side processing, it edits the PDF without server-side uploading.

Input validation helps detect invalid lines and out-of-range page numbers. Japanese titles and other Unicode text can be encoded as bookmark titles.

Perfect For

Use it for internal documents, e-book tables of contents, academic papers, presentation sections, scanned PDFs, and manuals with stable page numbers but no sidebar navigation. To split an existing bookmarked PDF, use [PDF Split by Bookmarks](/en/pdf/pdf-split-by-bookmarks/). To add visible page numbers, use [PDF Page Number](/en/pdf/pdf-page-number/). To edit document properties, use [PDF Metadata Editor](/en/pdf/pdf-metadata-editor/).