Spreadsheet Converter

One spreadsheet converter.

Convert spreadsheets: XLS ↔ XLSX, CSV ↔ XLSX and more — universal spreadsheet converter. Limits: 3/day, 25MB.

Up to 25 MB for server (free, no signup).

About Spreadsheet Converter

One spreadsheet converter.

Free limits: 3/day, 25MB.

Where it is used

CSV→XLSX.

How to use the Spreadsheet Converter

  1. Select Spreadsheet — select a file (.xls,.xlsx,.csv,.ods) — Up to 25 MB for server (free, no signup)..
  2. Output Format — enter the value.
  3. Calculate — press the Calculate button to see the result instantly above.

Formula

CSV in-browser; Excel via server. Free: 3/day, 25MB.

Examples

CSV to XLSX

output:xlsx
Result: Queued

Frequently Asked Questions

Why server?
Excel needs LibreOffice.
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