Reference · Updated May 2026

The Markdown cheatsheet.

Every Markdown syntax you'll actually use, with copy-paste examples and what they render to. Bookmark this. Standard Markdown plus GitHub-Flavored Markdown plus the extensions that work in Eyrie, Obsidian, and most modern tools.

Basics.

Headings

# Heading 1
## Heading 2
### Heading 3
#### Heading 4
##### Heading 5
###### Heading 6

Emphasis

Syntax	Renders as
**bold**	bold
*italic* or _italic_	italic
***bold italic***	bold italic
~~strikethrough~~	strikethrough
==highlight==	highlight (GFM ext.)

Lists

- Unordered item
- Another item
  - Nested item

1. Ordered item
2. Second item
   1. Nested ordered

- [ ] Task to do
- [x] Task done

Links

[link text](https://example.com)
[link with title](https://example.com "Hover text")
<https://example.com>   (autolink)

[Eyrie][1]
[1]: https://tryeyrie.com   (reference-style)

Images

![alt text](image.png)
![alt text](image.png "title")
![local file](./assets/diagram.png)

Code

Inline `code` with backticks.

```
Code block
multiple lines
```

```python
def hello():
    print("with language tag")
```

Blockquotes

> A single-line blockquote.

> Multi-line
> blockquote with
> multiple lines.

> Nested
>> Deeper level

GitHub-Flavored Markdown extensions.

Tables

| Column 1 | Column 2 | Column 3 |
| -------- | :------: | -------: |
| left     | center   | right    |
| data     | data     | data     |

Footnotes

Here's a claim that needs a citation[^1].

[^1]: This is the footnote text.

Task lists

- [ ] Unfinished task
- [x] Completed task

Strikethrough

~~No longer relevant.~~

Eyrie / Obsidian / vault extensions.

Wikilinks

[[note-name]]
[[note-name|custom display text]]
[[note-name#heading]]   (links to a specific heading)

Tags

This note relates to #ai and #note-taking.

Callouts (Obsidian-style)

> [!NOTE]
> This is a note callout.

> [!WARNING]
> This is a warning.

> [!TIP]
> A useful tip.

Eyrie supports 15 callout types: NOTE, TIP, IMPORTANT, WARNING, CAUTION, ABSTRACT, INFO, TODO, SUCCESS, QUESTION, FAILURE, DANGER, BUG, EXAMPLE, QUOTE.

Math (LaTeX)

Inline math: $E = mc^2$

Block math:
$$
\int_0^\infty e^{-x^2} dx = \frac{\sqrt{\pi}}{2}
$$

Frontmatter (YAML)

---
title: My Note
date: 2026-05-25
tags: [research, ai]
status: draft
---

# Your note content starts after the frontmatter.

Mermaid diagrams

```mermaid
graph LR
    A[Start] --> B{Decision}
    B -->|Yes| C[Action]
    B -->|No| D[Stop]
```

Superscript / subscript

E = mc^2^ and H~2~O

TOC

[TOC]   (auto-generates table of contents from headings)

Horizontal rule.

---

or

***

or

___

Escaping special characters.

Put a backslash \ before any Markdown character to render it literally:

\*not italic\*
\[not a link\]
\# not a heading

What works where.

Feature	Standard	GFM	Eyrie / Obsidian
Headings, emphasis, lists, links, code, images, blockquotes	✓	✓	✓
Tables	—	✓	✓
Strikethrough ~~	—	✓	✓
Task lists	—	✓	✓
Footnotes [^1]	—	✓	✓
Highlight ==	—	—	✓
Wikilinks [[...]]	—	—	✓
Tags #tag	—	—	✓
Callouts > [!NOTE]	—	—	✓
Math $...$	—	—	✓
Frontmatter YAML	—	—	✓
Mermaid diagrams	—	partial	✓