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Paste JSON to format, minify and validate it instantly.
Input
Output
Formatted output will appear here.
No — everything happens in your browser using JavaScript's built-in JSON parser. Nothing you paste here is sent to a server, which matters if your data includes API keys, tokens, or other sensitive values.
It points to the line and column where the parser first got confused — usually a missing comma, an extra trailing comma, unquoted keys, or a mismatched bracket right before that position.
Format (prettify) adds indentation and line breaks so JSON is easy to read. Minify strips all unnecessary whitespace to produce the smallest possible output — useful for production payloads.
No — it only changes the display order of object keys alphabetically. JSON objects are unordered by specification, so this doesn't affect how any valid JSON parser interprets the data.
Common invisible issues: single quotes instead of double quotes, trailing commas after the last item, unquoted keys, or comments — none of these are valid in standard JSON even though they're common in JavaScript object literals.