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JSON → CSV Converter

Convert a JSON array of objects to CSV with automatic header detection — client-side.

Runs 100% in your browser — nothing is uploaded

About this tool

The JSON to CSV converter takes a JSON array of objects and produces a comma-separated values file with automatic header detection. The first row contains the column names (keys from the objects), and subsequent rows contain the values.

Common use cases: exporting API response data to a spreadsheet, preparing data for import into a database or data analysis tool, converting API responses for non-technical colleagues. Values containing commas, newlines, or quotes are properly escaped per RFC 4180.

Frequently asked questions

What if the JSON objects have different keys?
All unique keys across all objects are collected as columns. Objects missing a key have an empty cell for that column.
Are nested objects supported?
Nested objects are converted to their JSON string representation in a single cell. For deep nesting, consider flattening the structure first.

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