What JSON structure is supported?

The tool expects a JSON array of objects (e.g., [{"name": "Alice"}, {"name": "Bob"}]) or a single object. Object keys become CSV column headers.

How are nested objects handled?

When 'Flatten nested objects' is enabled, nested keys are joined with dots. For example, {"address": {"city": "NYC"}} becomes a column named 'address.city'. Arrays are serialized as JSON strings.

Can I use a different delimiter?

Yes. You can choose comma, semicolon, tab, or pipe as your CSV delimiter. The default is comma.

JSON to CSV

Convert JSON arrays to CSV with optional nested object flattening using dot-notation. Handles complex structures. Choose your preferred delimiter. All processing happens in your browser — your data stays private.

Drop files here or click to browse

Supports .JSON (up to 20 files)

Your files are processed entirely in your browser. Nothing is uploaded to any server.

How to Use JSON to CSV

1
Upload your data file
Drag and drop your CSV, JSON, or data file into the upload area.
2
Configure the transformation
Set delimiters, choose columns, or select the output format for your data.
3
Download the result
Click download to save the cleaned or converted data file. Processing runs locally in your browser.

Frequently Asked Questions

Next Steps

Clean the generated CSV

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