# PDF Link Annotator Automatically convert URLs and chapter references into clickable external/internal links > Canonical page: https://elysiatools.com/en/tools/pdf-link-annotator - **Category:** Document Tools - **Keywords:** pdf, links, annotations, url, chapter, goto ## Overview Generate a text PDF with clickable link annotations. **Features:** - Auto-detect URLs and attach external links - Auto-detect chapter headings and add internal jumps - Supports `[[Chapter Name]]` references and optional plain chapter-name linking - Works for documentation and long-form reports ## Inputs - **Document Text** (textarea): # Guide Overview This section links to https://example.com/docs and Chapter 2: API Usage. # Chapter 1: Setup Read more at https://example.com/setup and jump to \[\[Chapter 2: API Usage\]\]. # Chapter 2: API Usage Visit https://example.com/api and return to \[\[Chapter 1: Setup\]\]. - **Page Size** (select) - **Landscape** (checkbox) - **Font Size** (number) - **Line Height** (number) - **Page Margin** (number) - **Auto Link Chapter Names** (checkbox) ## When to use - When you need to convert technical documentation into a navigable PDF with internal cross-references. - When you want to ensure all URLs in a report are active and clickable for the reader. - When creating long-form guides that require quick navigation between specific chapters. ## How it works - Paste your document text into the editor and configure your preferred page layout settings. - The tool automatically scans for standard URL patterns and converts them into clickable external links. - It identifies chapter headings or explicit \[\[Chapter Name\]\] references to generate internal jump anchors. - Download your finalized, fully annotated PDF document ready for distribution. ## Use cases - Creating interactive user manuals with clickable table of contents and external resource links. - Converting research papers into PDFs with active citations and cross-chapter references. - Generating professional project reports that allow stakeholders to jump directly to specific sections. ## Frequently asked questions ### Does it support internal navigation? Yes, the tool detects chapter headings and explicit [[Chapter Name]] references to create internal jump links. ### Can I choose between A4 and Letter page sizes? Yes, you can select your preferred page size in the configuration options. ### What happens if I disable 'Auto Link Chapter Names'? Only explicit references formatted as [[Chapter Name]] will be converted into internal links, leaving plain text chapter names unchanged. ### Can I adjust the document's appearance? Yes, you can customize font size, line height, page margins, and orientation (landscape or portrait). ### Is this tool suitable for long reports? 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