📊 Excel to CSV Converter
Turn an .xlsx or .xls workbook into plain CSV — choose the sheet and download, all on your device.
Everything runs in your browser — nothing is uploaded to any server.
How the excel to csv converter works
The workbook is parsed in the browser with SheetJS. If it has multiple sheets you pick which one to export; the chosen sheet's cells are written out as comma-separated values with quoting where needed, ready to copy or download as a .csv. Formulas are exported as their computed values.
CSV is the universal format for importing data into databases, analytics tools and scripts — but spreadsheets often live as .xlsx. Converting locally matters because spreadsheets routinely hold financial, HR or customer data you shouldn't hand to a random web converter. Only the values are kept — formatting, charts and formulas-as-formulas are dropped, which is expected for CSV.
Frequently asked questions
How do I convert Excel to CSV?
Open your .xlsx or .xls file, pick the sheet if there's more than one, and copy or download the CSV. It all happens in your browser.
What happens to multiple sheets?
CSV holds one table, so you choose which sheet to export. Run the tool again for each sheet you need.
Are formulas exported?
As their calculated values, not the formula text — which is what CSV supports. Formatting, colours and charts are not part of CSV and are dropped.
Is my spreadsheet uploaded?
No — SheetJS parses it in your browser. Financial and personal data in the file never leaves your device, and it works offline.