Convert Excel (XLSX) to CSV
To convert Excel to CSV, open the converter in Sigmera, drop your .xlsx or .xls file, pick the sheet if there’s more than one, and download a clean UTF-8 CSV. It all happens in your browser — your file is never uploaded to a server, so it’s GDPR-safe by design and works without Excel installed.
Last updated: June 2026
Use the Excel → CSV converter free in your workspace
Free account, no credit card — every tool, unlimited rows, 3 free downloads a month, nothing uploaded.
🔒 Everything runs in your browser — your file is never uploaded, and the workspace even works offline once it has loaded.
How to convert Excel to CSV
- 1. Open the converter in your free workspace. Your workbook is read into the browser’s memory — never sent over the network.
- 2. Drop your .xlsx or .xls file. If it has multiple sheets, choose which one to export.
- 3. Download the CSV. You get a clean, UTF-8 comma-separated file ready for any import.
Frequently asked questions
- Does this tool upload my Excel file?
- No. The Excel-to-CSV conversion runs entirely inside your web browser using client-side JavaScript. Your file is never uploaded to a server, so it is GDPR-safe by design.
- Which sheet gets converted?
- By default the first sheet is exported. If the workbook has several sheets, you can pick which one to convert before downloading the CSV.
- Does it work with old .xls files?
- Yes. Both the modern .xlsx format and the legacy .xls format are supported, and the export is a standard UTF-8 CSV that any tool can read.
- Do I need Excel installed?
- No. The conversion happens in the browser, so you don't need Microsoft Excel or any spreadsheet app installed.