JSON Formatter & Validator
Beautify, minify, and validate JSON with one click
Keys: —
Size: —
—
Input
Output
— output will appear here —
About JSON
JSON (JavaScript Object Notation) is the most common data interchange format on the web. Formatted/beautified JSON is easy to read and debug; minified JSON reduces payload size for APIs and storage. This tool validates syntax and reports key counts.
Common issues: trailing commas (invalid in JSON), single quotes instead of double quotes, unquoted keys, and comments (not supported in JSON). Use this formatter to quickly spot syntax errors before deploying your API or config.
lightbulb Example
Input:
{"a":1,"b":[2,3]}1Formatted with 2-space indent
2Key count: 2 (top-level)
✓ Valid JSON — ready to use