Does it use the first row as headers?

Yes. By default the first row becomes the JSON keys.

Can I download the JSON as a file?

Yes. Use the Download button next to the output to save the result as data.json.

Can it handle huge datasets?

Yes. Local processing converts large CSV files without upload limits.

Are my data files secure?

Yes. Conversion happens in your browser for this tool.

CSVをJSONに

The CSV to JSON converter turns comma-separated values into a JSON array of objects, using the first row as keys. It runs in your browser so your data is parsed locally for this conversion.

無料 · 制限なし · ブラウザで処理

使い方

1Paste your CSV data or upload a CSV file.
2The tool maps columns and generates JSON.
3Copy or download the resulting JSON array.

よくある質問

Does it use the first row as headers?: Yes. By default the first row becomes the JSON keys.
Can I download the JSON as a file?: Yes. Use the Download button next to the output to save the result as data.json.
Can it handle huge datasets?: Yes. Local processing converts large CSV files without upload limits.
Are my data files secure?: Yes. Conversion happens in your browser for this tool.