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JSON Hero: Converter & Formatter banner

JSON Hero: Converter & Formatter

The ultimate tool for working with JSON data. JSON Hero allows you to convert complex JSON files into easy-to-read Excel (.xlsx) or CSV files. It intelligently flattens nested objects and arrays into tabular format. You can also use it to convert spreadsheets back into JSON, format and beautify messy JSON, or explore your data in an interactive tree viewer. It's an essential utility for developers, data analysts, and anyone working with APIs.

Tool Interface
JSON Input
Options
Table Preview
Your JSON data displayed as a table.

Provide valid JSON to see the table preview.

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Features
  • Convert JSON to Excel (.xlsx) and CSV.
  • Convert Excel (.xlsx) and CSV to JSON.
  • Intelligently flattens nested JSON objects.
  • Interactive tree viewer for exploring JSON structure.
  • Built-in JSON formatter and beautifier.
  • Works entirely in your browser for data privacy.
Frequently Asked Questions

Is there a file size limit?

The tool is designed for moderately sized files. Very large files (>10MB) may cause performance issues in the browser.

How are nested objects handled?

Nested objects are "flattened" into separate columns using dot or underscore notation (e.g., `user.address.city`), which you can choose in the options.

Is my data secure?

Yes. All file processing and conversion happens locally in your browser. Your data is never sent to our servers.