CSV to XLSX Converter - Free, Instant, In Your Browser
Upload a .csv file to convert it into a .xlsx spreadsheet, with each comma-separated row and column mapped directly to cells.
How to use CSV → XLSX
- 1Drag and drop your file, or click to select it.
- 2Click Convert to run CSV → XLSX.
- 3Download the result - your file never leaves your device.
Drag & drop a file here, or click to browse
Your file is processed in your browser and is never uploaded.
Frequently Asked Questions
Does it handle commas inside quoted fields?
No - this tool uses simple comma splitting, matching most basic CSV exports. Files with commas embedded inside quoted fields may split unexpectedly.
Is my file uploaded to a server?
Yes, briefly - the conversion runs on our server since browsers can't generate real Word or Excel files natively. The file is processed and deleted immediately after - it's never stored long-term.