JSON Formatter and Validator
Format, validate, and beautify JSON. Minify or prettify. Detect errors with helpful messages.
How to use this tool
- Paste JSON data into editor
- Click Format/Beautify to indent and prettify
- Or click Minify to remove whitespace
- View syntax errors with line numbers if invalid
- Use tree view to explore nested structure
- Copy formatted result for use in code or APIs
About JSON Formatter
The JSON formatter beautifies compact JSON with proper indentation and line breaks, making nested structures readable. It also minifies (removes whitespace) for production use, validates syntax, and highlights errors with helpful messages.
Features include: syntax validation, error detection with line numbers, tree/outline view for exploring structure, collapsible nodes for large JSON, search functionality, and conversion between compact and pretty formats.
All processing happens locally using JavaScript JSON.parse/JSON.stringify. No data is uploaded, critical for API responses with sensitive data, config files with secrets, or proprietary data structures.