JSON Visualiser

Free JSON visualizer tool - validate, format and convert JSON to CSV. Instant response for developers with no limits.

Swap input and output

Convert JSON array of objects to CSV. Each object becomes a row.

Convert CSV (with headers) to JSON array of objects.

JSON input

Output

About this tool

JSON Visualizer is a free online tool for formatting, validating, and visualizing JSON data. JSON (JavaScript Object Notation) is the standard data format for APIs and web applications. This tool helps developers, data analysts, and API users validate JSON syntax, format messy JSON, highlight errors, and explore complex data structures. Perfect for debugging API responses, configuring applications, and understanding data schemas. All processing happens in your browser.

How to use

1Paste or type your JSON data into the editor
2The tool instantly validates the JSON syntax and highlights any errors
3JSON is automatically formatted with proper indentation and line breaks
4Click on elements to expand/collapse complex nested structures
5Copy formatted JSON or error messages with one click

Specifications and limits

Validates JSON according to RFC 7158 standard. Supports files up to 10 MB. Highlights syntax errors with line numbers. Supports nested objects, arrays, and all JSON data types. Tree view for large datasets.