JSON Formatter

Paste your JSON into the input area and it is formatted automatically with proper indentation and syntax highlighting. You can also choose your indentation size (2 or 4 spaces, or tabs), then copy or download the formatted result.

JSON formatting (beautifying) adds proper indentation and whitespace to make JSON human-readable. JSON validation checks whether the JSON is syntactically correct — whether brackets match, strings are properly quoted, commas are placed correctly, etc. Our tool does both simultaneously.

Yes. Click the Minify button to remove all unnecessary whitespace, newlines, and indentation from your JSON. This produces the most compact representation — ideal for API responses, data files, and code where whitespace is wasted space.

Paste your JSON into the formatter. If there is a syntax error, the tool highlights the problematic line and shows an error message indicating what is wrong. Common errors include missing commas between items, unquoted keys, trailing commas, or mismatched brackets. Fix the highlighted line and re-paste.

Yes. The formatter handles arbitrarily complex nested objects and arrays. Each nesting level is indented for easy readability. Large JSON objects with hundreds of keys are processed instantly in your browser.

No. JSON formatting is done entirely in your browser using JavaScript's built-in JSON.parse() and JSON.stringify() functions. Your data never leaves your device. This is important when working with sensitive API keys, user data, or proprietary configurations.

Yes. Use the Sort Keys option to alphabetically order all object keys at every nesting level. This makes it easier to scan large JSON objects and compare differences between two JSON structures.

If your JSON is a stringified JSON (a JSON string with escaped quotes like '{\"key\":\"value\"}'), first unescape it using our URL Decoder or by pasting into a text editor and running find-replace on backslashes. Then paste the clean JSON into the formatter.

Yes. The formatter is fully responsive and works on iPhone and Android browsers. Paste your JSON, tap Format, and tap Copy to use the result in any app. For long JSON on mobile, switching to landscape mode gives more screen space.

Yes. Completely free, no sign-up required, no usage limits, and no character count restrictions. Format and validate as much JSON as you need, as often as you need.