JSON Formatter & Validator
Paste JSON to validate it, pretty-print it with your preferred indentation, or minify it for production. Errors are reported with the exact line and column.
Output
Formatted JSON will appear here.Frequently asked questions
What makes JSON invalid?
Common mistakes are trailing commas, single quotes instead of double quotes, unquoted property names, and comments — none of which are allowed in standard JSON.
What is the difference between formatting and minifying?
Formatting adds line breaks and indentation to make JSON easy to read. Minifying removes all unnecessary whitespace to make the file as small as possible.
Is my JSON sent to a server?
No. Parsing and formatting happen entirely in your browser, so it's safe to use with API responses and configuration files.
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