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Home›JSON Formatter & Validator

JSON Formatter & Validator

Format, validate, and minify JSON online. Syntax highlighting, error detection, and instant beautification. Free developer tool.

✅ Valid JSON — 3 keys, depth 1, 42 bytes

{
  "name": "CalcMonk",
  "tools": 35,
  "free": true
}

📊 JSON Stats

3

Keys

1

Max Depth

55 B

Formatted

42 B

Minified

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Frequently Asked Questions

What is JSON?▼
JSON (JavaScript Object Notation) is a lightweight data format used for APIs, configuration files, and data exchange between systems.
How to fix invalid JSON?▼
Common errors: missing quotes around keys, trailing commas, single quotes instead of double quotes. Our validator shows the exact error location.
What's the difference between formatted and minified JSON?▼
Formatted JSON has indentation and newlines for readability. Minified JSON removes all whitespace to reduce file size — useful for APIs and production.
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