How to Format JSON
Formatting JSON means turning compressed or inconsistent data into readable, consistently indented text.
Direct Answer
Paste the raw JSON, run a formatter, and copy the beautified output. If formatting fails, validate the syntax first.
Fast workflow
- 1Paste the JSON into a formatter.
- 2Choose 2 spaces for common web output or 4 spaces for deeper nested structures.
- 3Run the format action and review the result.
- 4Copy the output back into your codebase, docs, or debugging workflow.
What formatting actually changes
A formatter does not change the JSON data itself. It only changes whitespace such as line breaks and indentation.
That makes JSON easier to scan, compare in pull requests, and debug when fields are deeply nested.
{"name":"StructKit","features":["format","validate"],"meta":{"status":"active"}}When formatting fails
A formatter can only beautify valid JSON. If the parser throws an error, the data likely contains a trailing comma, missing quote, missing colon, or another syntax issue.
In that case, switch to a validator so you can inspect the exact parse error and line/column position.
Common mistakes
- Using single quotes instead of double quotes for keys or string values.
- Leaving a trailing comma after the last array item or object property.
- Copying JavaScript object literals and assuming they are valid JSON.