How to Format JSON Online

JSON (JavaScript Object Notation) is the standard data format for APIs, configuration files, and data exchange. But raw JSON from APIs, logs, or minified sources is often unreadable. Formatting JSON makes it human-readable and helps catch syntax errors.

Why format JSON?

• Readability — properly indented JSON is much easier to understand and debug.
• Error detection — formatters highlight syntax errors like missing commas, unmatched brackets, and trailing commas.
• Data validation — ensure your JSON is valid before sending it to an API or storing it in a database.
• Minification — remove whitespace to reduce file size for production deployments.

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