JSON Tools
JSON Formatter
Pretty-print JSON with custom indentation.
Indent:
JSON input
Pretty-printed JSON
(output)About this tool
Paste minified or messy JSON, get cleanly indented output. Choose 2 / 4 spaces or tabs. Errors are flagged with line and column.
FAQs
Does it preserve key order?
Yes - JavaScript JSON.parse + JSON.stringify keep insertion order for string keys.
Will it format JSON with comments (JSON5)?
No - strict JSON only. Strip comments first, or use a JSON5-aware tool.
Does it support trailing commas?
No, those are invalid in standard JSON. The validator will flag them.