Is my CSV data uploaded to a server?

No. The CSV file is read entirely in your browser using the File API. No data is ever sent to any server.

What file formats are supported?

CSV (comma-separated), TSV (tab-separated), and JSON arrays. The delimiter is auto-detected.

Yes. Click any cell to edit it in-place. You can also add or delete rows and columns, then export the modified data.

Open, view, sort, filter, and edit CSV, TSV, or JSON files directly in your browser. Convert between formats. Nothing is uploaded anywhere.

✓ In-browser No upload Free

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Drop file here or browse

Supported: CSV, TSV, JSON - max 50 MB

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No data loaded

Drop a CSV, TSV, or JSON file above, or paste data in the Paste tab.

No Upload Required

Your data stays in your browser. Files are read locally - nothing is sent to any server.

Edit & Export

Click any cell to edit. Add or remove rows and columns, then export as CSV, TSV, or JSON.

Large File Support

Handles files with thousands of rows smoothly. Sort and filter in real time.