CSV to Excel
Convert CSV to a real Excel .xlsx workbook in your browser. Paste or upload your data, preview the columns, and download a spreadsheet Excel opens natively.
How it works
- 01Paste your CSV or drop a .csv file.
- 02Confirm the detected delimiter.
- 03Preview the parsed columns and rows.
- 04Download a ready-to-open .xlsx workbook.
Frequently asked questions
Does this create a genuine Excel file?
Yes. It builds a real .xlsx workbook using the SheetJS library, so the download opens natively in Microsoft Excel, Google Sheets, LibreOffice and Apple Numbers.
Does it detect my delimiter?
Yes. Comma, semicolon and tab-separated files are detected automatically and you can override the choice, so European semicolon exports convert correctly too.
Is my data uploaded anywhere?
No. The workbook is generated entirely in your browser and the spreadsheet engine is loaded locally. Your data never leaves your device.
Will my numbers and text stay intact?
Cell values are written as-is from your CSV. Excel then applies its own formatting on open, so long numeric IDs are preserved as the text they were in the source file.
How large a file can I convert?
Typical spreadsheets convert instantly. Because everything runs in the browser, very large files depend on your device's memory, but there is no upload limit.