JSON Syntax Highlighting

Highlight JSON syntax with color-coded keys, strings, numbers, and booleans.

When to use this tool

Ideal for reading API responses, configuration files, or JSON data structures more easily with color-coded tokens. Developers use it to quickly spot keys, strings, numbers, and booleans when debugging or documenting JSON payloads.

How to use

Paste your JSON string into the input field. Click "Highlight" to apply color-coded syntax highlighting. Inspect the output where keys, strings, numbers, and booleans are visually distinguished.

Input

Output

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Continue with tools that fit this output and developer workflow.

Previous tool JSON Decode Pretty-print decoded JSON claims so fields are easy to copy.

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API Reference

Tier: Free
Endpoint: POST http://5.75.144.42/api/v1/tools/syntax-highlighting/json-syntax-highlighting
Method: POST
Content-Type: application/json

Rate Limits

Unauthenticated: 10 req/min
Free: 30 req/min
Premium: 1000 req/min

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Request Body

{
    "input": "{\"name\":\"John\",\"age\":30,\"active\":true}"
}

Sample Request

curl -X POST "http://5.75.144.42/api/v1/tools/syntax-highlighting/json-syntax-highlighting" \
    -H "Content-Type: application/json" \
    -H "Authorization: Bearer YOUR_API_KEY" \
    -d '{"input":"{\"name\":\"John\",\"age\":30,\"active\":true}"}'

Sample Response

{
    "success": true,
    "data": {
        "input": "{\"name\":\"John\",\"age\":30,\"active\":true}",
        "result": "{<br>    <span class=\"syn-key\">\"name\"</span>: <span class=\"syn-string\">\"John\"</span>,<br>    <span class=\"syn-key\">\"age\"</span>: <span class=\"syn-number\">30</span>,<br>    <span class=\"syn-key\">\"active\"</span>: <span class=\"syn-bool\">true</span><br>}"
    },
    "meta": {
        "tool": "json-syntax-highlighting",
        "tier": "free"
    }
}