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JSON Formatter & Validator
Paste JSON below, then format (pretty-print) or minify it. Invalid JSON shows a clear error instead of failing silently.
FAQ
Does this send my JSON to a server?
No — formatting, minifying, and validation all happen locally in your browser using
No — formatting, minifying, and validation all happen locally in your browser using
JSON.parse/JSON.stringify. Nothing is uploaded.Why does it say my JSON is invalid?
Common causes: trailing commas, single quotes instead of double quotes, or unquoted keys — all invalid in strict JSON even though they're valid in JavaScript object literals.
Common causes: trailing commas, single quotes instead of double quotes, or unquoted keys — all invalid in strict JSON even though they're valid in JavaScript object literals.
What's the difference between Format and Minify?
Format adds indentation for readability; Minify strips all unnecessary whitespace to produce the smallest possible payload.
Format adds indentation for readability; Minify strips all unnecessary whitespace to produce the smallest possible payload.