JSON Formatter
Format JSON to make it readable.
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Tool guide
JSON Formatter: how it works
Practical information to understand the result and use this tool correctly.
About JSON Formatter
Messy minified JSON is hard to read. A formatter parses the structure and reprints it with indentation so objects and arrays are visible.
Use this when debugging API responses, config files, or logs. Invalid JSON should surface a parse error instead of silent corruption.
Processing is local: paste only data you are comfortable handling on your device.
How to use it
- 1Paste raw JSON.
- 2Format / pretty-print the document.
- 3Fix errors if the parser reports invalid syntax.
- 4Copy the cleaned JSON back to your editor or API client.
Frequently asked questions
- Why is my JSON invalid?
- Common issues: trailing commas, single quotes instead of double quotes, or unquoted keys. Strict JSON requires double-quoted strings and keys.
- Does formatting change the data?
- Pretty-print should preserve values and only change whitespace. Minify does the reverse.