Yes, completely free with no signup required.

Does my data leave my device?

No. All processing happens locally in your browser — nothing is sent to a server.

Does it work on mobile?

Yes. The tool is mobile-first and works on any modern browser.

大きなCSVを行数単位で分割し、各チャンクを個別にダウンロードできます。

CSV input Rows per chunk

Paste your CSV (with header row) into the text area.
Set how many data rows you want per chunk (e.g., 100).
Click "Split CSV" and download each chunk — every file includes the original header row.

Is this tool free?: Yes, completely free with no signup required.
Does my data leave my device?: No. All processing happens locally in your browser — nothing is sent to a server.
Does it work on mobile?: Yes. The tool is mobile-first and works on any modern browser.

Last updated: 2026-05-20 By jarvisbox