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CSV to Excel Converter

Your data never leaves your device

How to Use

  1. 1. Choose direction — Select CSV→Excel or Excel→CSV.
  2. 2. Upload your file — Drop a CSV or Excel file.
  3. 3. Preview — Check the first rows in the preview table.
  4. 4. Convert & download — Click convert and download the result.

Frequently Asked Questions

Is my data safe?
Yes. Conversion happens entirely in your browser using SheetJS. No files are uploaded to any server.
What Excel formats are supported?
XLSX and XLS files for input. Output is always XLSX (the modern Excel format).
Can I convert multi-sheet Excel files?
Yes. When you upload an Excel file with multiple sheets, a dropdown lets you select which sheet to convert to CSV.
Are formulas preserved?
No. CSVArc converts the computed cell values, not the formulas. This is the expected behavior for CSV conversion.