Excel to CSV online: free, private, no upload
Export every sheet as a CSV file.
How it works
- 1
Drop your spreadsheet.
- 2
Pick a delimiter.
- 3
Download the CSV (or a ZIP for several sheets).
Convert XLSX, XLS or ODS workbooks to CSV. Choose a comma, semicolon or tab delimiter and get one CSV per sheet. Processed privately in your browser.
Convert XLSX, XLS or ODS workbooks to CSV. Choose a comma, semicolon or tab delimiter and get one CSV per sheet. Processed privately in your browser. Spreadsheets are read and converted locally in your browser, so sensitive data never leaves your device. Formulas are exported as their calculated values.
What people use it for
- Excel to CSV for exports, reports and data clean-up.
- Move data between spreadsheets, apps and APIs.
- Process financial or customer data privately.
Tips for best results
- Formulas are exported as their calculated values.
- Remove empty rows and merged cells first for the cleanest output.
- Large workbooks may take a moment to process.
Your files never leave your device
Unlike most online PDF tools, Intelli File does not upload your documents to a server. Everything runs in your browser using your own device, so contracts, IDs and financial records stay private. Only a small usage counter is sent so we can apply daily limits.
Read how we handle privacyWhat to do next
After this, you may want to Excel to JSON, CSV to Excel, or Split Excel.
Frequently asked questions
What happens with several sheets?+
Each sheet becomes its own CSV file and they are delivered together in a ZIP.
Are my files uploaded anywhere?+
No. The conversion runs inside your browser, so your file never leaves your device.
Is it free?+
Free accounts get a few tasks per day; sign up for more, or go Pro for unlimited use and larger files.
Is there a file size limit?+
Files are processed on your device, so the practical limit is your browser's memory. Formulas are exported as their calculated values.
Does it work on my phone?+
Yes. Modern mobile browsers run this tool, although large files are faster on a computer.