JSON to CSV Converter

Flattens nested JSON (dot-notation keys) into RFC 4180 compliant CSV, downloadable.

Flatten Nested JSON to RFC 4180 CSV

For data analysts and programmatic SEO engineers, working with nested JSON data from APIs can be a challenge when it comes to spreadsheet analysis and reporting. This tool provides a straightforward solution, converting complex JSON structures into clean, RFC 4180-compliant CSV files.

It automatically flattens nested objects using clear dot-notation keys (e.g., {"user": {"name":"John"}} becomes user.name) and intelligently handles arrays by collecting the union of all keys, ensuring a comprehensive dataset. The generated CSV is ready for immediate use in any spreadsheet software or data processing pipeline.

How to Use This Converter

  1. Paste or type the JSON data into the textarea labeled "Input JSON".
  2. (Optional) Tick the checkbox if you want a header row in your CSV output.
  3. Click 'Convert to CSV' to generate the CSV preview in the output area.
  4. Review the generated CSV in the "Output CSV" textarea.
  5. Click 'Download CSV' to save the RFC 4180-compliant file to your local machine.

FAQ

Q: How does the converter handle nested objects?

A: It flattens nested objects using dot-notation keys, so {"a":{"b":1}} becomes a.b in the CSV.

Q: What if my JSON has arrays with missing keys?

A: The converter builds a CSV header from the union of all keys across array items, leaving missing values empty.

Q: Are special characters like commas, quotes, or newlines escaped?

A: Yes, any value containing a comma, quote, or newline is surrounded by double quotes and internal quotes are doubled, per RFC 4180.

Q: Can I download the CSV directly?

A: After conversion, click the 'Download CSV' button to download the RFC 4180-compliant file.

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