Format and visualize JSON with ease. Collapse or expand nodes, and copy or delete sections with a click.

Supports high-precision numbers (BigInteger, BigNumber, BigDecimal) and auto-fixes common JSON syntax errors.

All tools on this site run entirely in your browser locally. No data is uploaded to any server.

Common issues that can be repaired:

• Missing quotes: unquoted keys or string values, e.g. {name: "John"}
• Missing commas: commas omitted between object or array elements
• Trailing commas: an extra comma after the last element
• Single quotes: single quotes used instead of double quotes, e.g. {'name': 'John'}
• Special quotes: special characters such as Chinese curly quotes “”‘’
• Comments: contains /* ... */ or // ... comments
• Truncated JSON: content cut off, leaving brackets/quotes unclosed
• Python constants: None/True/False converted to null/true/false
• Escaped strings: removes redundant escape characters, e.g. {\"key\": \"value\"}
• JSONP: removes the callback({...}) wrapper
• Code block markers: removes ```json ``` fences
• Ellipsis: removes ... placeholders in arrays/objects
• Multi-line JSON: merges multiple newline-separated JSON entries into an array

Options:

• Sort JSON: Sort by key names
• Minify JSON: Remove spaces and line breaks
• Escape JSON: Escape JSON strings
• JSON to DICT: Convert JSON to Python dict

Common uses:

• Format and beautify JSON for reading and debugging
• Sort JSON key-values for easy viewing
• Compress JSON to reduce transfer size