JSON Formatter & Validator

Format, validate, sort, and minify JSON with automatic date detection.

config.json

Format Options

input.json
output.json

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Frequently asked questions

Paste your JSON into the editor. Choose indent size (2 spaces, 4 spaces, or tabs). Enable options like sort keys, sort by date, or minify. The formatted result appears instantly.

No. All formatting happens 100% client-side in your browser. Your data never leaves your machine.

Yes. Enable 'Fix trailing commas' to automatically remove trailing commas before parsing. The tool also handles common JSON syntax issues.

Automatically detects ISO date strings in array objects and sorts the array chronologically. Choose ascending (oldest first) or descending (newest first).

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