JSON Syntax Highlighting
Format JSON into clean, indented text that a syntax highlighter can color-code cleanly. Nothing leaves your device.
Your result appears here.
What this tool produces
Syntax highlighting needs structure to work with. This tool parses your JSON and re-prints it with two-space indentation and one key or element per line, so that when you paste it into an editor, a documentation page, a slide, or a Markdown code fence, the highlighter has a clear token on every line to color: keys, string values, numbers, booleans, null, and the braces and brackets. The tool itself outputs plain text; the colors come from wherever you paste it.
How JSON value types are rendered
| Type | How it appears | Typically colored as |
|---|---|---|
| String | "hello" in double quotes | green / red |
| Number | 42, 3.14 bare | blue / purple |
| Boolean / null | true, false, null bare | orange / keyword |
| Key | "name": quoted, before a colon | bold / teal |
| Structure | { } [ ] | punctuation / dim |
Worked example
Input (one line, unhighlightable):
{"id":7,"name":"Ada","admin":false,"tags":["a","b"]}Formatted for highlighting:
{
"id": 7,
"name": "Ada",
"admin": false,
"tags": [
"a",
"b"
]
}Drop that into a fenced block:
```json
{ ... }
```When to use it
Preparing a JSON snippet for a blog post, a README, a Stack Overflow answer, a design doc, or a code review comment, where a readable, colorable block matters more than a compact one.
FAQ
Which highlighter should I use to render it?
Most editors highlight JSON out of the box. For the web, Prism and highlight.js both have a json grammar; GitHub and most Markdown renderers highlight ```json fences automatically.
Will it preserve my key order?
Yes. Only whitespace is added.
Can I get 4-space indentation?
This page outputs two spaces; retab in your editor if you need another width.
Is anything sent to a server?
No. It runs locally.