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Developer Runs in your browser

JSON formatter and validator

Format, minify, and validate JSON with line and column error reporting.

Parsed with the built-in JSON parser: no comments and no trailing commas. Input is limited to 1,000,000 characters to keep the page responsive.

Limitations

Very large inputs are limited to keep the tab responsive. Parsing uses the built-in JSON parser: no custom extensions, no comments or trailing commas.

Privacy

JSON is parsed in your browser and never transmitted.

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Feedback

Something wrong, unclear, or missing? Report a problem and mention the tool name.