About Format JSON
Use the JSON formatter online to turn a compact API response or configuration into readable text. Choose the default two-space indent or pretty print JSON with 4 spaces. Parsing also checks syntax before a formatted result is created.
How to format and validate JSON
- Paste valid JSON, including any required double quotes.
- Choose 2 or 4 spaces and select Process.
- Inspect the formatted result and copy or download formatted.json.
A practical example
- Input
{"name":"Ada","active":true}- Result
{ "name": "Ada", "active": true }
Whitespace changes, while the parsed property values remain the same for this input.
Supported input and limitations
- Standard JSON only: comments, trailing commas, and single-quoted property names are not accepted. Input is limited to 5 MB.
- JavaScript JSON parsing can round integers beyond its safe range and keeps only the last duplicate property. Do not use it to preserve the exact lexical form of sensitive numeric data.
Processing happens on your device. Read about local processing and optional workspace recovery.
Frequently asked questions
Can I format JSON with comments or trailing commas?
Not directly. Remove comments and trailing commas first, or use a parser specifically designed for JSONC or JSON5.
Does formatting JSON sort the keys?
No sorting operation is requested here. Use Sort JSON keys for recursive sorting; numeric-looking property names may still follow JavaScript serialization rules.