XLSXCSV
Free online converter. No signup, no watermark. Just drop your file.
Tap to upload or drop files
.xlsx files · Up to 10 files, 100MB each
How it works
Upload
Drop .xlsx
Convert
Instant
Download
Get .csv
About XLSX and CSV
What is XLSX?
XLSX is the modern Microsoft Excel spreadsheet format supporting formulas, charts, and multiple worksheets.
What is CSV?
CSV (Comma-Separated Values) is a simple tabular data format that can be opened in any spreadsheet application or parsed programmatically.
FAQ
Is this free?
Yes, completely free. No signup, no watermarks, no hidden fees.
Is my file safe?
Files are converted on our servers and immediately deleted. We never store or share your files.
What's the maximum file size?
You can convert files up to 100MB.
Will formulas be preserved in CSV?
No. CSV only stores raw values. Formulas, formatting, charts, and multiple sheets are lost during conversion.
Can I open CSV in Excel?
Yes. CSV files open directly in Excel, Google Sheets, and virtually every spreadsheet or data application.