Format, validate, and minify JSON code online. Instantly prettify messy JSON, fix syntax errors, and explore data in tree view — free, no signup.
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This utility is a high-performance node optimized for modern browser environments. All data processing is executed client-side, ensuring zero knowledge transfer to external servers.
Paste your JSON text and click 'Format'. The tool adds proper indentation and line breaks to make it human-readable. It also validates the JSON and highlights any syntax errors.
Paste your JSON and click Validate. The tool highlights the exact line and character position of any syntax errors — missing commas, unmatched brackets, unclosed strings, etc.
Formatting (prettify) adds whitespace and indentation to make JSON human-readable. Minification removes all unnecessary whitespace to make files smaller for production APIs. Use formatted JSON for development, minified for production.
Yes. Switch to Tree View mode to explore your JSON object hierarchy interactively. You can expand and collapse nested objects and arrays, making it easy to navigate complex data structures.
No. Everything runs locally in your browser. Your JSON data never leaves your device — safe for API responses containing sensitive data.