Upload a modern Excel file
Choose a .xlsx, .xlsm, .xltx, or .xltm workbook. The browser reads the file locally instead of uploading it to a server.
free tool · excel to csv
Convert Excel to CSV without uploading your workbook.
Upload a modern Excel workbook, choose the sheet you need, and export clean CSV in seconds. The file is read locally in your browser, so customer data stays on your device.
Private browser conversionPick any worksheetComma, semicolon, or tab outputCopy or download CSV
01
How to convert Excel to CSV
Use this tool when a spreadsheet needs to become a clean CSV for scripts, imports, databases, support workflows, or quick data handoffs.
Pick the worksheet
If the workbook has multiple sheets, choose the one you want to export. The preview updates before you copy or download.
Copy or download CSV
Export with comma, semicolon, or tab delimiters, then copy the result or download a .csv file.
02
A practical Excel to CSV converter for SaaS data work
Excel files are often the starting point for customer onboarding and account migration. This converter gives you a quick private way to turn a workbook sheet into a CSV.
Multi-sheet workbooks
Select the exact sheet you need instead of exporting the wrong tab or manually deleting extra data after conversion.
Private by default
The workbook is parsed in the browser. It is useful for customer exports, internal lists, or sample data that should not be uploaded to random sites.
Clean escaping
Values containing commas, quotes, line breaks, or leading spaces are escaped correctly so the CSV can be imported elsewhere.
Delimiter choices
Use comma for most tools, semicolon for many European spreadsheet workflows, or tab when you need TSV-style output.
Modern Excel formats
The browser tool supports modern XML-based Excel files. If you have an old binary .xls file, save it as .xlsx first.
Good for importer tests
Turn real workbook examples into CSV fixtures, QA files, and import test cases before you wire the workflow into your app.
03
When Excel to CSV is useful
CSV remains the simplest exchange format for many import pipelines. These are the situations where converting from Excel usually comes up.
Customer onboarding
Convert a customer workbook to CSV before testing how the data will land in your onboarding importer.
Database imports
Prepare a sheet for Postgres, MySQL, Airtable, or BI tools that expect flat CSV input.
Support and ops cleanup
Take a workbook from a customer or internal team and quickly produce a CSV that scripts and dashboards can use.
Importer debugging
Compare the Excel source and CSV output when an import fails because of delimiters, quotes, dates, or blank cells.
04
Questions about this tool
Short answers for the things people usually ask.
Is this Excel to CSV converter free?
Yes. It is free to use, no signup required, and it runs directly in your browser.
Is my Excel file uploaded to Rowslint?
No. The workbook is read locally in the browser. The CSV output is generated on your device.
Does it support old .xls files?
This browser tool supports modern Excel formats like .xlsx and .xlsm. If you have an old binary .xls workbook, open it in Excel, Numbers, or LibreOffice and save it as .xlsx first.
Can I choose a specific worksheet?
Yes. After upload, choose the worksheet from the Sheet dropdown and export only that sheet.
How do I let customers upload Excel files inside my SaaS app?
Rowslint embeds an Excel and CSV importer in your product. It handles mapping, validation, and clean row delivery so customers do not have to convert files manually.
from one-off tools to product workflows
Let customers import CSV and Excel files inside your app.
Rowslint adds mapping, validation, and clean row delivery to your product so your team is not building an importer from scratch.