Code tool
JSON Formatter
Paste JSON to format it with indentation or catch syntax errors.
Why format JSON
Formatted JSON is easier to scan, compare, and debug. This formatter parses the input in your browser and shows a readable version with two-space indentation. If the JSON is invalid, it shows the parser error so you know where to start looking.
How to use it
- Paste a JSON object, array, or response body into the text box.
- Click Format JSON.
- Read the formatted output or fix the error message.
- Copy the cleaned JSON into your editor, API client, or documentation.
Common JSON errors
- Single quotes instead of double quotes.
- Trailing commas after the last item.
- Missing commas between properties.
- Unquoted keys such as
{name: "Ayo"}. - Mismatched braces or brackets.
FAQ
Does formatting JSON change the data?
No. Formatting adds line breaks and indentation. The values stay the same when the input is valid JSON.
Can this format API responses?
Yes. Paste the JSON response body and format it to inspect fields, nested objects, and arrays more easily.
Why does valid JavaScript fail here?
JSON is stricter than JavaScript object syntax. Keys and string values need double quotes, and trailing commas are not allowed.
Related guides: How to format JSON for easier reading and Common JSON validation errors.