> ## Documentation Index
> Fetch the complete documentation index at: https://docs.pdf4llm.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Supported Formats

> Input formats MuPDF.NET can read, and output formats it can produce.

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## Input Formats

MuPDF.NET can open and extract content from the following document types:

| Format      | Extensions               | Notes                                         |
| ----------- | ------------------------ | --------------------------------------------- |
| PDF         | `.pdf`                   | All versions, including encrypted and scanned |
| XPS         | `.xps`                   | Microsoft XML Paper Specification             |
| eBooks      | `.epub`, `.mobi`, `.fb2` | Reflowable content is linearised per chapter  |
| Comic Books | `.cbz`                   | Image-based pages; OCR recommended            |

***

## Output Formats

MuPDF.NET can produce output in four formats depending on your use case:

| Format     | Function                        | Best For                                                |
| ---------- | ------------------------------- | ------------------------------------------------------- |
| Markdown   | `ToMarkdown()`                  | LLM ingestion, RAG pipelines, readable docs             |
| JSON       | `ToJson()`                      | Custom pipelines needing bounding boxes and layout data |
| Plain Text | `ToText()`                      | Simple text extraction, search indexing                 |
| Images     | `ToMarkdown(writeImages: true)` | Preserving figures, charts, and diagrams                |

### Markdown

The default and most commonly used output format. Text is extracted in reading order with headings, lists, tables, and inline formatting preserved where detectable.

```csharp theme={null}
string mdText = PdfExtractor.ToMarkdown("document.pdf");
```

### JSON

Returns structured data including bounding boxes, font information, and layout metadata for every block on the page. Useful for building custom post-processing pipelines.

```csharp theme={null}
string json_output = PdfExtractor.ToJson("document.pdf");
```

### Plain Text

Strips all formatting and returns raw text content. Ideal when downstream tools do not need Markdown syntax.

```csharp theme={null}
string text = PdfExtractor.ToText("document.pdf");
```

### Images

When `writeImages: true` is passed to `ToMarkdown()`, embedded images and graphics are extracted and saved to disk. Image paths are referenced inline in the Markdown output.

```csharp theme={null}
string mdText = PdfExtractor.ToMarkdown("document.pdf", writeImages: true, imagePath: "images/");
```

***

## Next Steps

<CardGroup cols={2}>
  <Card title="Extract Markdown" icon="markdown" href="/dotnet/guides/extract-Markdown">
    Full walkthrough of `ToMarkdown()` with common options.
  </Card>

  <Card title="Images & Graphics" icon="image" href="/dotnet/guides/images-and-graphics">
    Controlling image extraction, DPI, and output path.
  </Card>
</CardGroup>