# Create Clickable Table of Contents for Your PDFs

*Create a clickable PDF table of contents in seconds — AI detects every heading and builds structured navigation automatically.*

Add a clickable table of contents to your PDF using our free AI tool. Perfect for reports, manuals, and books. No registration required and no watermark added to your document.

Page: <https://products.documentize.ai/zh-hans/zh-Hans/table-of-contents>

## How It Works

### 1. Upload Your PDF
Select a PDF file from your computer. No registration or installation required.

### 2. Choose Heading Levels
Set how many heading levels (H1–H3, for example) should appear in your table of contents.

### 3. Generate Table of Contents
Font-size analysis identifies heading candidates ranked by prominence. A language model then reviews the top candidates alongside additional structural signals — page count, paragraph density, font range — to produce a validated, hierarchical TOC.

### 4. Download the Updated PDF
Download the updated PDF with both an embedded TOC page at the beginning and clickable PDF bookmarks in the navigation panel — compatible with any PDF reader.

## Example: PDF with Automatic Table of Contents

See how a long document becomes easier to navigate with automatically generated bookmarks and structured TOC.

## FAQ

### What files can I use?
PDF files only. DOCX and other formats are not supported at this time.

### Does this edit the content of my PDF?
No. The tool adds a navigation outline (visible in most PDF readers) but doesn’t modify the text, images, or layout.

### What’s the difference between a TOC page and bookmarks?
This tool adds bookmarks (the navigation panel in most readers), not a visible TOC page inside the document.

### How does it decide which lines are headings?
The AI uses font size, style, and layout hierarchy to determine heading structure.

### Can I change the TOC after generation?
Not inside this tool. You can use a PDF editor like Adobe Acrobat to adjust headings or bookmarks if needed.

### Can I get the output in another format besides PDF?
Currently, the output is generated only as a PDF to ensure consistent layout. You can convert the file later using our partner <a href="https://products.documentize.app">site</a>.

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