JSON Formatter & Validator
Transform messy, minified JSON strings into clean, readable code. This tool creates a structured tree view of your data, fixes indentation, validates syntax errors (like missing commas or quotes), and helps you make sense of complex API responses.
Formateador JSON
Formatear, validar y embellecer datos JSON
Formateador JSON
Quién Usa Esta Herramienta
- • Backend Developers debugging API responses
- • Data Analysts reviewing JSON exports
- • Frontend Devs mocking state objects
- • Configuration Managers editing config.json
- • Students learning data structures
Características Clave
- ✓ Syntax Validation (detects errors)
- ✓ Auto-indentation (2 or 4 spaces)
- ✓ Collapsible/Expandable tree view
- ✓ Color-coded syntax highlighting
- ✓ Click-to-copy functionality
- ✓ Handles massive JSON payloads
Preguntas Frecuentes
Can it fix bad JSON?
It will validate and point out the error (e.g., 'Expected string at line 5'). It intentionally does not 'auto-fix' logic to prevent data corruption, but it prettifies the structure so you can spot the fix easily.
Is my data sent to a server?
No. This runs entirely in your browser using JavaScript. You can safely format sensitive config files or private data without it leaving your machine.
How do I make it smaller again?
Use our 'JSON Compact' tool to minify it back to a single line for production use.
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