How does it handle nested objects?

It automatically flattens nested objects into dot-notation columns (e.g., 'user.address.city') when converting to tabular formats like CSV or Excel.

Can I convert Excel to JSON?

Yes! Just upload your .xlsx file, and we will extract the first sheet and convert it to JSON array.

Absolutely. We do not use any server-side processing for this tool. All conversion and file generation happens locally on your computer.

Universal JSON Converter

⚠️ Tool Moved & Upgraded

This tool has been consolidated into the Universal JSON Formatter suite. The new version supports CSV delimiters, JSONL, TOML, YAML, and much more!

Go to Universal JSON Formatter

How to Use This Universal JSON Converter

1Paste your data (JSON, CSV, JSONL) or upload an Excel file.
2Select your desired Output format (CSV, Excel, JSON, JSONL).
3View the data in the Table Preview tab.
4Click Download or Copy to get your converted file.

Features

✓Convert JSON to CSV, Excel (XLSX), and JSONL
✓Convert Excel/CSV back to JSON
✓Visual Data Grid Preview (Table View)
✓Automatic flattening of nested JSON structures
✓Handle large datasets efficiently in-browser
✓100% private: All data stays in your browser

Why use the Universal JSON Converter?

JSON is the standard for web APIs, but analysts need Excel/CSV. Developers often need JSON Lines (NDJSON) for logs or streams. This tool bridges all these worlds in one place without uploading your data to a server.

Frequently Asked Questions

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