JSON Formatter & Validator

Paste JSON to format, minify, or validate it. Clear error messages show exactly what is wrong. Runs entirely in your browser.

Format / Validate JSON

Paste JSON here

Output

JSON Format Reference

Keys must be quoted strings: "key": "value"
Strings use double quotes, not single quotes
Numbers, booleans (true/false), and null do not use quotes
Trailing commas are not allowed in arrays or objects
Comments are not valid JSON

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