This free CSV to JSON converter lets you transform spreadsheet-style data into structured JSON arrays in seconds. It also works in reverse as a JSON to CSV converter, making it useful for API testing, ETL prep, imports, exports, and cleaning raw datasets before development work.

Because everything runs locally in your browser, you can convert CSV files with headers, JSON arrays of objects, and delimiter-based tabular data without uploading sensitive content to a server.

Common CSV JSON conversion use cases

Convert exported spreadsheet rows into JSON for frontend fixtures and API mocks
Turn JSON API responses into CSV for analysts, product managers, or finance teams
Normalize seed data before importing into databases or internal tools
Quickly inspect headers, column counts, and row counts before a bulk import

FAQ

Does it support semicolon or tab-delimited files?

Yes. You can switch between comma, semicolon, tab, and pipe delimiters before converting the data.

What JSON format is required for JSON to CSV?

Use a JSON array of objects, such as [{"name":"Alice"}, {"name":"Bob"}]. The tool uses object keys as CSV headers.