{ } JSON Formatter & Validator
Paste JSON to instantly format, validate and beautify it. Supports minifying, error highlighting, and copying clean output.
Input JSON
Formatted Output
What Is JSON?
JSON (JavaScript Object Notation) is a lightweight data format used by virtually every modern API and web service. It's human-readable but can become hard to parse when minified (all on one line). This formatter takes minified or malformed JSON and structures it with proper indentation.
The validator checks for common JSON errors like trailing commas, missing quotes on keys, single quotes instead of double quotes, and unmatched brackets — all of which cause JSON.parse() to throw an error.