Convert CSV data to Excel (.xlsx) file and download online. All processing is done locally in your browser.
TL;DR: Free online CSV to Excel converter that exports CSV data as .xlsx files with custom sheet names and separators. Columns are auto-detected and the file downloads instantly, all in your browser.
This tool runs entirely in your browser. Open DevTools → Network panel and search your input — it appears in no request.
Usage Guide
Turn CSV text into a real .xlsx workbook — not a renamed CSV, but a workbook file generated locally with the xlsx library. Paste or import, convert in the browser, and your rows never leave the machine.
1. How to use
- Paste CSV content into the input box (or import from a file).
- Click convert — a local xlsx workbook is generated.
- Download export.xlsx; it opens in Excel / WPS as a real, filterable, pivot-ready table.
2. Why not just rename the file
- A renamed CSV still triggers the text-import wizard in Excel, with mojibake for CJK; a real xlsx just double-clicks open.
- The exported xlsx supports bold headers, filters and later pivots — no re-doing Text to Columns.
- Exports from admin panels and database tools become far easier to share with business colleagues as xlsx.
3. A classic pitfall
Leading-zero loss is the canonical CSV-to-Excel trap: order IDs, area codes and phone numbers lose their leading zeros when Excel reads them as numbers. Spot-check such columns after converting and set them to Text format in Excel if needed. Mind encoding too: if the source CSV is GBK rather than UTF-8, CJK text garbles — re-save the source as UTF-8 before pasting.
FAQ
Completely free with no registration. The .xlsx file is generated locally in your browser and downloads instantly.
Yes. You can set a custom worksheet name before generating, and configure separators such as comma, semicolon, or tab.
It produces a standard .xlsx file that opens directly in Excel, WPS, Numbers, or Google Sheets.
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