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Markdown, or md (or MD) is a human-friendly syntax for formatting plain text. It is used to make README's (like this one) and it can also be used to format github disscusions.
Get started/Writing on GitHub/Start writing on GitHub/Basic formatting syntax Basic writing and formatting syntax:
To create a heading, add one to six # symbols before your heading text. The number of # you use will determine the hierarchy level and typeface size of the heading.
Code:
# A first-level heading
## A second-level heading
### A third-level heading
#### A fourth-level heading
##### A fifth-level heading
###### A sixth-level heading
Rendered:
When you use two or more headings, GitHub automatically generates a table of contents that you can access by clicking within the file header. Each heading title is listed in the table of contents and you can click a title to navigate to the selected section.
You can indicate emphasis with bold, italic, strikethrough, subscript, or superscript text in comment fields and .md files.
Bold: ** ** or __ __ **This is bold text** This is bold text
Italic: * * or _ _ _This text is italicized_ This text is italicized
Strikethrough: ~~ ~~ ~~This was mistaken text~~ This was mistaken text
Bold and nested italic: ** ** and _ _ **This text is _extremely_ important** This text is extremely important
All bold and italic *** *** None ***All this text is important*** All this text is important
Subscript: <sub> </sub> This is a <sub>subscript</sub> text This is a subscript text
Superscript: <sup> </sup> This is a <sup>superscript</sup> text This is a superscript text
You can quote text with a >.
>Text that is a quote
Text that is a quote Quoted text is indented, with a different type color.
Note: When viewing a conversation, you can automatically quote text in a comment by highlighting the text, then typing R. You can quote an entire comment by clicking, then Quote reply. For more information about keyboard shortcuts, see "Keyboard shortcuts."
You can call out code or a command within a sentence with single backticks. The text within the backticks will not be formatted. You can also press the Command+E (Mac) or Ctrl+E (Windows/Linux) keyboard shortcut to insert the backticks for a code block within a line of Markdown.
Use git status to list all new or modified files that haven't yet been committed.
Screenshot of rendered GitHub Markdown showing the appearance of characters surrounded by backticks. The words "git status" appear in a fixed-width typeface, highlighted in light gray.
To format code or text into its own distinct block, use triple backticks.
Some basic Git commands are:
git status
git add
git commit
If you are frequently editing code snippets and tables, you may benefit from enabling a fixed-width font in all comment fields on GitHub.
In issues, pull requests, and discussions, you can call out colors within a sentence by using backticks. A supported color model within backticks will display a visualization of the color.
The background color is #ffffff for light mode and #000000 for dark mode.
Screenshot of rendered GitHub Markdown showing how HEX values within backticks create small circles of color. #ffffff shows a white circle, and #000000 shows a black circle.
Here are the currently supported color models.
Color Syntax Example Output
HEX #RRGGBB #0969DA Screenshot of rendered GitHub Markdown showing how HEX value #0969DA appears with a blue circle.
RGB rgb(R,G,B) rgb(9, 105, 218) Screenshot of rendered GitHub Markdown showing how RGB value 9, 105, 218 appears with a blue circle.
HSL hsl(H,S,L) hsl(212, 92%, 45%) Screenshot of rendered GitHub Markdown showing how HSL value 212, 92%, 45% appears with a blue circle.
A supported color model cannot have any leading or trailing spaces within the backticks. The visualization of the color is only supported in issues, pull requests, and discussions.
You can create an inline link by wrapping link text in brackets [ ], and then wrapping the URL in parentheses ( ). You can also use the keyboard shortcut Command+K to create a link. When you have text selected, you can paste a URL from your clipboard to automatically create a link from the selection.
You can also create a Markdown hyperlink by highlighting the text and using the keyboard shortcut Command+V. If you'd like to replace the text with the link, use the keyboard shortcut Command+Shift+V.
This site was built using GitHub. [GitHub](https://github.com/)
Note: GitHub automatically creates links when valid URLs are written in a comment.
You can link directly to a section in a rendered file by hovering over the section heading to expose.
You can define relative links and image paths in your rendered files to help readers navigate to other files in your repository.
A relative link is a link that is relative to the current file. For example, if you have a README file in root of your repository, and you have another file in docs/CONTRIBUTING.md, the relative link to CONTRIBUTING.md in your README might look like this:
[Contribution guidelines for this project](docs/CONTRIBUTING.md)
GitHub will automatically transform your relative link or image path based on whatever branch you're currently on, so that the link or path always works. The path of the link will be relative to the current file. Links starting with / will be relative to the repository root. You can use all relative link operands, such as ./ and ../.
Relative links are easier for users who clone your repository. Absolute links may not work in clones of your repository - we recommend using relative links to refer to other files within your repository.
You can display an image by adding ! and wrapping the alt text in [ ]. Alt text is a short text equivalent of the information in the image. Then, wrap the link for the image in parentheses ().
GitHub supports embedding images into your issues, pull requests, discussions, comments and .md files. You can display an image from your repository, add a link to an online image, or upload an image. For more information, see "Uploading assets."
Note: When you want to display an image that is in your repository, use relative links instead of absolute links. Here are some examples for using relative links to display an image.
In a .md file on the same branch /assets/images/electrocat.png In a .md file on another branch /../main/assets/images/electrocat.png In issues, pull requests and comments of the repository ../blob/main/assets/images/electrocat.png?raw=true In a .md file in another repository /../../../../github/docs/blob/main/assets/images/electrocat.png In issues, pull requests and comments of another repository ../../../github/docs/blob/main/assets/images/electrocat.png?raw=true Note: The last two relative links in the table above will work for images in a private repository only if the viewer has at least read access to the private repository that contains these images. For more information, see "Relative Links."
You can specify the theme an image is displayed for in Markdown by using the HTML
For example, the following code displays a sun image for light themes and a moon for dark themes:
<picture>
<source media="(prefers-color-scheme: dark)" srcset="https://user-images.githubusercontent.com/25423296/163456776-7f95b81a-f1ed-45f7-b7ab-8fa810d529fa.png">
<source media="(prefers-color-scheme: light)" srcset="https://user-images.githubusercontent.com/25423296/163456779-a8556205-d0a5-45e2-ac17-42d089e3c3f8.png">
<img alt="Shows an illustrated sun in light mode and a moon with stars in dark mode." src="https://user-images.githubusercontent.com/25423296/163456779-a8556205-d0a5-45e2-ac17-42d089e3c3f8.png">
</picture>
The old method of specifying images based on the theme, by using a fragment appended to the URL (#gh-dark-mode-only or #gh-light-mode-only), is deprecated and will be removed in favor of the new method described above.
You can make an unordered list by preceding one or more lines of text with -, *, or +. Code:
- George Washington
* John Adams
+ Thomas Jefferson
Rendered:
- George Washington
- John Adams
- Thomas Jefferson
To order your list, precede each line with a number.
Code:
1. James Madison
1. James Monroe
1. John Quincy Adams
Rendered:
- James Madison
- James Monroe
- John Quincy Adams
You can create a nested list by indenting one or more list items below another item.
To create a nested list using the web editor on GitHub or a text editor that uses a monospaced font, like Visual Studio Code, you can align your list visually. Type space characters in front of your nested list item until the list marker character (- or *) lies directly below the first character of the text in the item above it.
Code:
1. First list item
- First nested list item
- Second nested list item
Rendered:
- First list item
- First nested list item
- Second nested list item
Note: In the web-based editor, you can indent or dedent one or more lines of text by first highlighting the desired lines and then using Tab or Shift+Tab respectively.
To create a nested list in the comment editor on GitHub, which doesn't use a monospaced font, you can look at the list item immediately above the nested list and count the number of characters that appear before the content of the item. Then type that number of space characters in front of the nested list item.
In this example, you could add a nested list item under the list item 100. First list item by indenting the nested list item a minimum of five spaces, since there are five characters (100 .) before First list item. Code:
100. First list item
- First nested list item
Rendered: 100. First list item - First nested list item
You can create multiple levels of nested lists using the same method. For example, because the first nested list item has seven characters (␣␣␣␣␣-␣) before the nested list content First nested list item, you would need to indent the second nested list item by at least two more characters (nine spaces minimum).
Code:
100. First list item
- First nested list item
- Second nested list item
Rendered: 100. First list item
- First nested list item
- Second nested list item
To create a task list, preface list items with a hyphen and space followed by [ ]. To mark a task as complete, use [x].
Code:
- [x] #739
- [ ] https://github.com/octo-org/octo-repo/issues/740
- [ ] Add delight to the experience when all tasks are complete :tada:
Rendered:
- #739
- https://github.com/octo-org/octo-repo/issues/740
- Add delight to the experience when all tasks are complete 🎉
If a task list item description begins with a parenthesis, you'll need to escape it with :
Code:
- [ ] \(Optional) Open a followup issue
Rendered:
- (Optional) Open a followup issue
You can mention a person or team on GitHub by typing @ plus their username or team name. This will trigger a notification and bring their attention to the conversation. People will also receive a notification if you edit a comment to mention their username or team name.
Note: A person will only be notified about a mention if the person has read access to the repository and, if the repository is owned by an organization, the person is a member of the organization. For instance:
@github/support What do you think about these updates?
When you mention a parent team, members of its child teams also receive notifications, simplifying communication with multiple groups of people. For more information, see "About teams."
Typing an @ symbol will bring up a list of people or teams on a project. The list filters as you type, so once you find the name of the person or team you are looking for, you can use the arrow keys to select it and press either tab or enter to complete the name. For teams, enter the @organization/team-name and all members of that team will get subscribed to the conversation.
The autocomplete results are restricted to repository collaborators and any other participants on the thread.
You can bring up a list of suggested issues and pull requests within the repository by typing #. Type the issue or pull request number or title to filter the list, and then press either tab or enter to complete the highlighted result.
If custom autolink references are configured for a repository, then references to external resources, like a JIRA issue or Zendesk ticket, convert into shortened links. To know which autolinks are available in your repository, contact someone with admin permissions to the repository.
You can upload assets like images by dragging and dropping, selecting from a file browser, or pasting. You can upload assets to issues, pull requests, comments, and .md files in your repository.
You can add emoji to your writing by typing :EMOJICODE:, a colon followed by the name of the emoji.
@octocat :+1: 👍 This PR looks great - it's ready to merge! :shipit: 
Typing : will bring up a list of suggested emoji. The list will filter as you type, so once you find the emoji you're looking for, press Tab or Enter to complete the highlighted result.
You can create a new paragraph by leaving a blank line between lines of text.
You can add footnotes to your content by using this bracket syntax: [^1]
Here is a simple footnote1.
A footnote can also have multiple lines2.
[^1]: My reference.
[^2]: To add line breaks within a footnote, prefix new lines with 2 spaces.
This is a second line.
Go to the bottom of the page to see how the footnotes render.
Note: The position of a footnote in your Markdown does not influence where the footnote will be rendered. You can write a footnote right after your reference to the footnote, and the footnote will still render at the bottom of the Markdown.
Footnotes are not supported in wikis.
Alerts are a Markdown extension based on the blockquote syntax that you can use to emphasize critical information. On GitHub, they are displayed with distinctive colors and icons to indicate the significance of the content.
Use alerts only when they are crucial for user success and limit them to one or two per article to prevent overloading the reader. Additionally, you should avoid placing alerts consecutively. Alerts cannot be nested within other elements.
To add an alert, use a special blockquote line specifying the alert type, followed by the alert information in a standard blockquote. Five types of alerts are available:
Code for alerts:
> [!NOTE]
> Useful information that users should know, even when skimming content.
> [!TIP]
> Helpful advice for doing things better or more easily.
> [!IMPORTANT]
> Key information users need to know to achieve their goal.
> [!WARNING]
> Urgent info that needs immediate user attention to avoid problems.
> [!CAUTION]
> Advises about risks or negative outcomes of certain actions.
Here are the rendered alerts:
Note
Useful information that users should know, even when skimming content.
Tip
Helpful advice for doing things better or more easily.
Important
Key information users need to know to achieve their goal.
Warning
Urgent info that needs immediate user attention to avoid problems.
Caution
Advises about risks or negative outcomes of certain actions.
You can tell GitHub to hide content from the rendered Markdown by placing the content in an HTML comment.
<!-- This content will not appear in the rendered Markdown -->
You can tell GitHub to ignore (or escape) Markdown formatting by using \ before the Markdown character.
\*Content with asterisks\* to *Content with asterisks*.
Normally putting single asterisks around text would make it italics, but inserting a forward-slash before each * makes it normal text.
Note: The Markdown formatting will not be ignored in the title of an issue or a pull request.
When viewing a Markdown file, you can click Code at the top of the file to disable Markdown rendering and view the file's source instead.
Disabling Markdown rendering enables you to use source view features, such as line linking, which is not possible when viewing rendered Markdown files.