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+title: Table of Contents Extension
+
+Table of Contents
+=================
+
+Summary
+-------
+
+The Table of Contents extension generates a Table of Contents from a Markdown
+document and adds it into the resulting HTML document.
+
+This extension is included in the standard Markdown library.
+
+Syntax
+------
+
+By default, all headers will automatically have unique `id` attributes
+generated based upon the text of the header. Note this example, in which all
+three headers would have the same `id`:
+
+```md
+#Header
+#Header
+#Header
+```
+
+Results in:
+
+```html
+<h1 id="header">Header</h1>
+<h1 id="header_1">Header</h1>
+<h1 id="header_2">Header</h1>
+```
+
+Place a marker in the document where you would like the Table of Contents to
+appear. Then, a nested list of all the headers in the document will replace the
+marker. The marker defaults to `[TOC]` so the following document:
+
+```md
+[TOC]
+
+# Header 1
+
+## Header 2
+```
+
+would generate the following output:
+
+```html
+<div class="toc">
+ <ul>
+ <li><a href="#header-1">Header 1</a></li>
+ <ul>
+ <li><a href="#header-2">Header 2</a></li>
+ </ul>
+ </ul>
+</div>
+<h1 id="header-1">Header 1</h1>
+<h1 id="header-2">Header 2</h1>
+```
+
+Regardless of whether a `marker` is found in the document (or disabled), the
+Table of Contents is available as an attribute (`toc`) on the Markdown class.
+This allows one to insert the Table of Contents elsewhere in their page
+template. For example:
+
+```pycon
+>>> md = markdown.Markdown(extensions=['markdown.extensions.toc'])
+>>> html = md.convert(text)
+>>> page = render_some_template(context={'body': html, 'toc': md.toc})
+```
+
+Usage
+-----
+
+See [Extensions](index.md) for general extension usage, specify `markdown.extensions.toc`
+as the name of the extension.
+
+See the [Library Reference](../reference.md#extensions) for information about
+configuring extensions.
+
+The following options are provided to configure the output:
+
+* **`marker`**:
+ Text to find and replace with the Table of Contents. Defaults to `[TOC]`.
+
+ Set to an empty string to disable searching for a marker, which may save
+ some time, especially on long documents.
+
+* **`title`**:
+ Title to insert in the Table of Contents' `<div>`. Defaults to `None`.
+
+* **`anchorlink`**:
+ Set to `True` to cause all headers to link to themselves. Default is `False`.
+
+* **`permalink`**:
+ Set to `True` or a string to generate permanent links at the end of each header.
+ Useful with Sphinx style sheets.
+
+ When set to `True` the paragraph symbol (&para; or "`&para;`") is used as
+ the link text. When set to a string, the provided string is used as the link
+ text.
+
+* **`baselevel`**:
+ Base level for headers. Defaults to `1`.
+
+ The `baselevel` setting allows the header levels to be automatically
+ adjusted to fit within the hierarchy of your HTML templates. For example,
+ suppose the Markdown text for a page should not contain any headers higher
+ than level 3 (`<h3>`). The following will accomplish that:
+
+ :::pycon
+ >>> text = '''
+ ... #Some Header
+ ... ## Next Level'''
+ >>> from markdown.extensions.toc import TocExtension
+ >>> html = markdown.markdown(text, extensions=[TocExtension(baselevel=3)])
+ >>> print html
+ <h3 id="some_header">Some Header</h3>
+ <h4 id="next_level">Next Level</h4>'
+
+* **`slugify`**:
+ Callable to generate anchors.
+
+ Default: `markdown.extensions.headerid.slugify`
+
+ In order to use a different algorithm to define the id attributes, define and
+ pass in a callable which takes the following two arguments:
+
+ * `value`: The string to slugify.
+ * `separator`: The Word Separator.
+
+ The callable must return a string appropriate for use in HTML `id` attributes.
+
+* **`separator`**:
+ Word separator. Character which replaces white space in id. Defaults to "`-`".