Instant In-Browser XLSX Conversion
CSV to Excel Converter
Convert CSV and TSV spreadsheets directly into Microsoft Excel (.xlsx) workbooks with custom worksheet titles and format protection.
Drop your CSV or TSV file here
Instantly bundles your rows into a downloadable Microsoft Excel (.xlsx) file.
Spreadsheet Data Preview
0 rows
Frequently Asked Questions
The converter parses your CSV tabular structure and generates a binary OpenXML (.xlsx) file in browser memory using client-side JavaScript, enabling immediate download without server processing.
Yes. When the 'Preserve all columns as text' option is checked, all cells are stored explicitly with string formatting so Excel will not trim leading zeros.
No. All parsing and XLSX generation occur strictly inside your device's browser memory sandbox. No data leaves your computer.