JSON Formatter & Validator
Format, minify, and validate JSON online. Paste your JSON to instantly pretty-print it with 2-space, 4-space, or tab indentation, or minify it for production. The validator shows the exact line and column of any syntax error.
Indentation
Example JSON
| Name |
|---|
| User Object |
| Array of Items |
| Nested Object |
| API Response |
| Config File |
| Error Response |
Frequently Asked Questions
JSON formatting adds indentation and newlines to make JSON human-readable. JSON.stringify(data, null, 2) in JavaScript (or json.dumps(data, indent=2) in Python) formats JSON with 2-space indentation. Minified JSON is identical in meaning but removes all whitespace for a smaller file size — important for API responses and mobile apps where bandwidth matters.
Format (pretty-print) adds indentation and line breaks to make JSON easy to read and debug — ideal when inspecting API responses from Razorpay, Stripe, or any REST API. Minify removes all non-significant whitespace to produce the smallest possible JSON string — ideal for production API payloads and config files where bandwidth and parse time matter. Both operations preserve the exact same data.
Common JSON errors include: (1) Trailing comma — {"a":1,} — JSON doesn't allow trailing commas after the last item, unlike JavaScript. (2) Unquoted keys — {name:"Alice"} — JSON requires double quotes around all keys. (3) Single quotes — {'key':'value'} — JSON uses double quotes only. (4) Missing closing bracket or brace. (5) Control characters in strings (tabs, newlines must be escaped as \t and \n). The validator shows the exact line and column of the first error.
Web servers minify JSON responses to reduce bandwidth and improve response time — a formatted 50 KB response might be 30 KB when minified, saving 40% of transfer time on mobile connections. In India, where 4G data is affordable but network latency varies, minified JSON is especially important for fast API calls. Tools like this formatter let you paste the minified API response and instantly read it in a structured format during development and debugging.