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GFM · CommonMark · GitHub callouts · footnotes

Complete Markdown cheatsheet

Every Markdown syntax you need — headings, emphasis, lists, tables, code, footnotes, GitHub callouts — copy-ready snippets.

Markdown Cheatsheet
Sections
10
categories
Snippets
20
syntax
Visible
20
all
Total MD
609 B
all snippets
Filter
syntax · markdown
Headings
Six levels: #, ##, …, ######
# H1
## H2
### H3
Emphasis
bold
**bold**
italic
*italic*
bold italic
***bold italic***
strikethrough (GFM)
~~strikethrough~~
Lists
Unordered, indent 2 spaces to nest
- item
- item
  - nested
Ordered
1. first
2. second
3. third
Task list (GFM)
- [ ] todo
- [x] done
Links & images
Inline link
[link text](https://example.com)
Inline image
![alt](https://img.url/x.png)
Reference-style link
[ref][1]

[1]: https://example.com
Autolink
<https://example.com>
Code
Inline code
`inline code`
Fenced code block (lang hint optional)
```js
console.log('hi');
```
Tables (GFM)
Right-align ---:, center :---:, left ---
| col1 | col2 |
| ---- | ---: |
| a    |  1.0 |
Blockquotes & rules
Blockquote
> quoted text
Horizontal rule (also ___ or ***)
---
Footnotes
Footnote (GFM)
See[^1]

[^1]: note text
Callouts (GitHub)
Also TIP, IMPORTANT, WARNING, CAUTION
> [!NOTE]
> Useful tip
Escaping
Backslash escapes any Markdown character
\*not bold\*
rendered · description
Headings
Six levels: #, ##, …, ######
Emphasis
bold
italic
bold italic
strikethrough (GFM)
Lists
Unordered, indent 2 spaces to nest
Ordered
Task list (GFM)
Links & images
Inline link
Inline image
Reference-style link
Autolink
Code
Inline code
Fenced code block (lang hint optional)
Tables (GFM)
Right-align ---:, center :---:, left ---
Blockquotes & rules
Blockquote
Horizontal rule (also ___ or ***)
Footnotes
Footnote (GFM)
Callouts (GitHub)
Also TIP, IMPORTANT, WARNING, CAUTION
Escaping
Backslash escapes any Markdown character
Quick Start

How to use the cheatsheet

Browse all Markdown syntax in one view. Click Copy to grab any snippet.

  1. 01

    Scan sections

    Headings, emphasis, lists, links, code, tables, footnotes, callouts.

    Parsing runs through marked with GFM extensions enabled — tables, task lists, strikethrough, and fenced code blocks all match GitHub’s rendering.

    navGFMmarkedCommonMarklive
    sections · markdown10 · GFM
    Headings
Emphasis
Lists…
    loaded · GFMGFM · ready
  2. 02

    Filter syntax

    Type 'table' or 'task' to jump to matching snippets.

    Soft-break behaviour is configurable: by default a single newline becomes a space (CommonMark), toggle on for chat-style <br> insertion.

    searchsoft-breaksoptionsconfiglive
    filter · optionstable · live
    Tables
    options applied · livelive
  3. 03

    Copy snippet

    Click Copy on any row to grab just that syntax.

    The preview is scoped under a .mde class so its CSS doesn’t bleed into the rest of the page. Output HTML is whitespace-controlled for clean diffs.

    copypreviewscoped CSSrenderstable
    snippet · rendered1 · ready
    ✓ Copied snippet
    rendered · liverendered
  4. 04

    Copy all

    Or grab the whole cheatsheet as a Markdown doc.

    Export covers both raw Markdown and rendered HTML; downloads stream as text/markdown or text/html via Blob + object URL.

    bulkclipboard.md.htmlblob
    ✓ · exportedall · done
    ✓ Copied all
    shipped · ready to shipsuccess
Pro tips

Author Markdown that renders everywhere

GFM is the safe default

GitHub-Flavored Markdown is the de-facto baseline (tables, task lists, strikethrough). CommonMark is stricter but ubiquitous as a fallback.

Soft-break behaviour varies

A single newline is a space in CommonMark, a <br> in GFM. Toggle soft breaks when source matters.

Escape inside code fences

Backticks inside fenced blocks need a longer fence — three becomes four. Use ~~~ if your content has many backticks.

Anchors are slugified

GitHub lowercases, strips punctuation, and joins with hyphens. Duplicate headings get -1, -2 suffixes.

Tables need a header row

The dash row sets alignment (:---, :-:, ---:). Use Table Aligner for diff-friendly columns.

Front matter is YAML

Triple-dash blocks at the top of files are parsed by static-site generators. Use the Front-Matter Validator to catch syntax errors.

Related toolsMarkdown to HTMLTable GeneratorLink GeneratorImage GeneratorCalloutsEmoji Picker
Use Cases

When to reach for the cheatsheet

Writers, developers, students.

Quick lookup

Forgot footnote syntax? Check here. Render path uses marked with GFM extensions enabled (tables, task lists, strikethrough, autolinks), so what you preview matches what GitHub publishes bit-for-bit. Soft-break behaviour is configurable for chat-style vs prose Markdown.

GFM-compliant

Learning Markdown

One-page overview of all syntax. Pairs cleanly with the Markdown Cheatsheet for syntax you can't quite remember — callout blocks, footnotes, definition lists. Output stays diff-friendly so style-only changes don't drown out real edits in PRs.

GitHub-perfect

README drafting

Snag the table or callout snippet quickly. Cross-platform safe: anchors, code fences, and tables behave identically on GitHub, GitLab, Bitbucket, and Gitea. Heading-anchor slugs follow GitHub's lowercase-and-hyphenate rules so deep links survive a docs migration.

diff-friendly

GitHub PRs

Get GFM-specific syntax right (callouts, tasks). No server roundtrip — perfect for proprietary content you can't paste into a public tool. The full marked + GFM bundle ships with the page, so it works offline once loaded.

render-stable

Style guide

Pin as team reference for Markdown house style. Front matter (YAML / TOML / JSON) passes through unchanged so static-site pipelines (Jekyll, Hugo, Astro, Eleventy) read it correctly. Pair with the Front-Matter Validator to catch syntax errors before deploy.

cross-platform

Teaching

Show all Markdown features at once. Output is reproducible: identical input always produces identical Markdown, so doc-generation scripts can rely on it for snapshot tests and embedded into release workflows.

SEO-friendly
FAQ

Frequently asked questions

Both. Tables, task lists, strikethrough, footnotes are GFM extensions; the rest is CommonMark.
GitHub's > [!NOTE] / [!WARNING] etc. — supported by GitHub itself; many other renderers ignore them.
Snippets are short. Use Markdown → HTML for full preview.
Open a PR — snippets live in this file in plain JS.
No. Everything is static.
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