JSON (JavaScript Object Notation) is the most common data format for APIs, configuration files, and data exchange. When JSON comes from APIs or logs, it's often a single long line — unreadable without formatting. This tool beautifies JSON with proper indentation and syntax highlighting, validates it with precise error messages, and can minify it for production use.
How to Use
Paste JSON data to instantly:
- Format: Beautify with 2 or 4 space indentation
- Validate: Check for syntax errors with line/column pinpointing
- Minify: Remove whitespace for smallest payload
- Analyze: See key count, depth, and data types
Common JSON Errors
- Trailing commas: JSON doesn't allow commas after the last item
- Single quotes: JSON requires double quotes for strings
- Unquoted keys: All keys must be double-quoted strings
- Comments: JSON does not support comments (use JSONC)
JSON vs Other Formats
- JSON vs XML: JSON is lighter, easier to parse, no closing tags
- JSON vs YAML: YAML is more human-readable but whitespace-sensitive
- JSON vs TOML: TOML is better for config files, JSON for data exchange
Step-by-Step Instructions
- 1Paste or type JSON data into the input area.
- 2View instant formatting with syntax highlighting.
- 3Check for validation errors with line/column details.
- 4Toggle between formatted and minified output.
- 5Review stats: key count, depth, and data types.