JSON Formatter

The JSON Formatter beautifies, validates, and minifies JSON. Paste your data to pretty-print it with your choice of indentation, catch syntax errors with a clear message, or minify it for production — all processed locally in your browser.

Beginner⏱ 30 secondsUpdated 2026-07-08

Paste your JSON

Style

Valid JSON

{
  "name": "EveryFix",
  "tools": 86,
  "free": true,
  "tags": [
    "fast",
    "private"
  ]
}

Formats, minifies, and validates JSON instantly in your browser — your data is never uploaded. Choose an indent style, or Minify to strip whitespace for production.

How This Tool Works

Paste JSON into the box and it is formatted and validated as you type. Pick 2 spaces, 4 spaces, tabs, or Minify, and copy the result. Invalid JSON shows a clear error so you can fix it.

Formula & Method

The tool parses your input with the browser’s native JSON engine. If it is valid, it re-serializes it with your chosen indentation (or with no whitespace to minify); if it is invalid, it reports the exact syntax error.

Example Calculation

Paste a compact API response, choose 2-space indentation, and it expands into clean, readable JSON — or switch to Minify to collapse it back to a single line for production.

Please note: This calculator provides estimates for general informational purposes only. Results may not be accurate for every situation — use your judgment and consult a relevant professional when it matters.

Frequently Asked Questions

Is my JSON data private?+

Yes. Everything is parsed and formatted in your own browser — your JSON is never uploaded to or stored on any server.

Why does it say my JSON is invalid?+

The tool uses a strict JSON parser, so common issues like trailing commas, single quotes, or unquoted keys will flag an error. The message points to where the problem is.

Can it minify JSON too?+

Yes — choose “Minify” to strip all whitespace and produce the smallest valid JSON, which is handy for production or APIs.

Help someone else out — or link to it from your own site.

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