Free Excel to CSV converter
Turn an Excel workbook into clean .csv files right in your browser. Every worksheet becomes its own CSV — rename it, download it or copy it.
- One sheet becomes one CSV
- Formulas come through as their computed values
- Nothing leaves your browser
Need the other direction? Convert CSV to Excel
Drag & drop Excel files hereorUp to 10 files · 20MB per file · 50MB total
Frequently asked questions
- What happens to a multi-sheet Excel workbook?
- Every worksheet becomes its own CSV file, named after the workbook and the sheet (for example sales-Q1.csv). Rename any of them before downloading, grab them one at a time, or download the whole set as a single zip.
- What happens to my formula cells?
- The CSV contains the computed value, not the formula text. Excel stores the last computed result inside the file and that is what we read. A workbook generated by a script that never cached its results will show those cells as empty.
- How are dates and numbers formatted?
- Dates come out as YYYY-MM-DD. Numbers come out plain — no currency symbols, no thousands separators — so the CSV stays easy to parse.
- Are my files uploaded to a server?
- No. The conversion happens entirely in your browser — your Excel files never leave your device.
- Why was my .xls file rejected?
- The old binary .xls format is not supported. Open the file in Excel (or any spreadsheet app) and use Save As to store it as .xlsx, then convert it here.
- How big can the files be?
- Up to 10 files at a time, 20MB per file, and 50MB in total. Everything runs on your own machine, so those limits keep the browser tab responsive.
- Is this Excel to CSV converter free?
- Yes. Converting Excel (.xlsx) workbooks to CSV is completely free, with no signup required.