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Free Developer Tool

JSON Formatter & Validator

Paste JSON to pretty-print it with proper indentation, minify it for production, or find exactly what's invalid.

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Format for humans, minify for machines

Format adds indentation and line breaks so nested structures become readable — essential when debugging API responses. Minify strips all whitespace to shrink payloads for production. The validator reports the exact parse error (like a trailing comma or unquoted key) so you can fix it fast.

Your JSON never leaves the browser — safe for data you can't paste into random websites.

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