CSV ↔ Excel Converter
Convert CSV to Excel (XLSX) and back. Handles multi-sheet workbooks, large files and UTF-8 — all in your browser.
- Runs in your browser
- No upload on server
- Free, forever
- Enter value
- Pick units
- Copy result
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Preview
Upload a file to see a preview here.
How this works — and why it's private
- Pick a direction — CSV to Excel or Excel to CSV.
- Choose your file. Multi-sheet workbooks show a sheet picker.
- Download a single sheet or every sheet as separate CSV files.
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