JSON Formatter & Validator
Paste JSON below to pretty-print, validate, or minify it. Runs entirely in your browser — nothing is uploaded.
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Formatted or minified JSON will appear here.
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About this tool
This formatter parses your JSON with the browser's native JSON.parse, so validation errors match exactly what you'd get in your own code — including the character position of the problem. Formatting uses 2-space indentation; minify strips all whitespace to produce the smallest possible payload.
Nothing you paste here is sent to a server. The entire tool runs as JavaScript in your browser tab.