Markdown Cheatsheet

Complete Markdown syntax reference with examples.

Headings

# Heading 1Largest heading

## Heading 2Second level heading

### Heading 3Third level heading

Emphasis

**bold**Bold text

*italic*Italic text

***bold italic***Bold and italic

~~strikethrough~~Strikethrough text

Lists

- ItemUnordered list item

1. ItemOrdered list item

- NestedNested list (indent 2 spaces)

- [x] TaskTask list (checked)

- [ ] TaskTask list (unchecked)

Links & Images

[text](url)Hyperlink

![alt](url)Image

[text](url "title")Link with title

<https://example.com>Auto-link

Code

`inline code`Inline code

```
code block
```

Fenced code block

```js
code
```

Code block with language

Blockquotes & Horizontal Rules

> QuoteBlockquote

> > NestedNested blockquote

---Horizontal rule

Tables

| H1 | H2 |
|---|---|
| C1 | C2 |

Table

| Left |
|:---|

Left align

| Center |
|:---:|

Center align

| Right |
|---:|

Right align

Other

[^1]Footnote reference

Term
: Definition

Definition list

<details>
<summary>Title</summary>
Content
</details>

Collapsible section

How to Use Markdown Cheatsheet

Paste your code or data into the input field
Choose the operation you want to perform
View the formatted, validated, or transformed output
Copy the result or download if available

Why Use Markdown Cheatsheet?

Developer tools on FreeTools.one are designed to replace the dozen browser tabs you'd otherwise need. JSON formatting, regex testing, JWT decoding, SQL formatting, diff checking — everything runs in your browser with zero configuration. There's nothing to install, no CLI to learn, no Docker containers to spin up. Each tool provides professional-grade output with syntax highlighting, error detection, and one-click copy. Your code and data never leave your device because all processing happens client-side. These tools are built by developers, for developers, with the exact features you need: customizable indentation, multiple output formats, real-time validation, and keyboard shortcuts. They're fast enough for quick checks during coding sessions and powerful enough for production data transformation.