Convert CSV to XLSX
CSV to XLSX converter: upload, click convert, download the result. Free, no watermarks, no account. Small files convert inside your browser (never uploaded). Larger ones go to our server and disappear automatically after a few minutes. Hit "Delete now" to wipe them instantly after download.
How to convert
- Pick your CSV file - drag it onto the dropzone or click to choose.
- The target format XLSX is already selected.
- Hit Convert and wait a few seconds. Larger files take longer.
- Download the result. Press Delete now to wipe the server copy immediately.
When to use it
- Import elsewhere - XLSX → CSV (universal).
- Backup / share - CSV → XLSX.
- Open in Excel - ODS / NUMBERS → XLSX.
- Reporting - XLSX → PDF.
- CSV → XLSX - common case.
Frequently asked questions
CSV is plain text — no formatting, no formulas, no charts. XLSX gives you the full Excel feature set on top of the same data. Convert CSV to XLSX when you want to add charts, conditional formatting or share with people who only use Excel.