Convert your .xls files to .csv format online for free. No software to install. Fast, secure, and easy.
Free — 3 conversions per day
Drag and drop your .xls file or click to browse.
Select CSV as your output format.
Click Convert and download your .csv file.
Converting from XLS (Microsoft Excel Binary Spreadsheet) to CSV (Comma-Separated Values) helps you work with your content in a different application or workflow. XLS and CSV serve different purposes, and converting between them bridges the gap.
XLS (Microsoft Excel Binary Spreadsheet, introduced in 1987) uses None (OLE2 compound binary) compression. CSV (Comma-Separated Values, introduced in 1972) uses None (plain text) compression. XLS browser support: None (requires office application). CSV browser support: Universal (displayed as plain text).
Converting from uncompressed XLS to CSV (lossless) reduces file size dramatically while preserving every bit of the original data. This is the ideal way to make large uncompressed files more manageable without any quality sacrifice.
Typical XLS file size: A 10,000-row spreadsheet: ~1-5 MB. Typical CSV file size: 100,000 rows x 10 columns of text: ~5-15 MB.
Check your delimiter settings before converting. Some regions use semicolons instead of commas as the CSV separator. Also verify that numeric columns with leading zeros (like ZIP codes) are preserved correctly, as CSV has no data type information.
Convert XLS to CSV with 3 free conversions per day. No hidden fees.
Create a free account in 10 seconds and start converting immediately. No credit card required.
Files are encrypted during transfer, processed on secure servers, and deleted immediately after conversion.
Convert files from any device — desktop, tablet, or phone. No software to install, works in any modern browser.
SquishConvert supports over 358 file conversion combinations across images, documents, audio, and video.
Your converted .csv file maintains the best possible quality. No unnecessary compression or quality loss.
You get 3 free conversions per day. Upgrade to Pro for unlimited conversions.
Most files convert in under 10 seconds. Larger files may take a bit longer depending on size.
Yes. Files are encrypted during transfer, processed on secure servers, and deleted immediately after conversion. We never store your files.
Currently, SquishConvert converts one file at a time. Batch conversion is coming soon — stay tuned!
Free users can convert files up to 10 MB. Pro users can convert files up to 500 MB.