How large a file can it open?

Up to 25 MB. The table shows 100 rows per page so it stays responsive.

Is my data sent to a server?

No. Everything is processed in your browser, which matters when the input is a production payload, token or query. Nothing is uploaded, logged or stored.

CSV Viewer - Free Online Tool

JavaScript is turned off. InspireTools processes files in your browser, so the tools need JavaScript to run.

Open CSV files as a sortable, searchable table.