XLS – Microsoft Excel 97-2003 Workbook
XLS is the legacy binary Excel format used before 2007. It is limited to 65,536 rows and is usually converted to XLSX or CSV.
More XLS conversionsDrop your XLS files here
or click to choose XLS files · up to 95MB each
How to convert XLS to CSV
- Choose your files. Click Select File or drag your XLS files into the upload box. You can add many at once.
- Pick the settings. CSV is already selected as the output format. The conversion starts as soon as a file is added.
- Download. Each file appears in the list when it is ready. Download them one by one, or all together with Download all.
CSV – Comma-Separated Values
CSV stores table data as plain text with values separated by commas. Almost every spreadsheet and database can import and export it, but it keeps no formatting or formulas.
More CSV conversionsConverting XLS to CSV
- CSV and TSV keep only the first sheet and no formatting.
Frequently asked questions
How do I convert XLS to CSV?
Click Select File or drop your XLS file onto the upload box. The converted CSV appears in the list below with a download button. You can add many files at once and download them together as a ZIP.
Is it really free?
Yes. There is no sign-up and no watermark. To keep the service available for everyone there is a 95MB limit per file and a cap on how many files one connection can process in a short period.
Are my files stored?
Your upload is used only to make the converted file. Images are processed in memory; other files are written to a private temporary folder that is deleted as soon as the conversion finishes. Nothing is kept after the result has been sent back.
Will quality drop?
For images, a little, by design: the image is re-encoded at the Quality you choose (default 75%). Audio and video are re-encoded with high-quality settings; documents keep their text and layout as far as the target format allows. Converting never restores detail that is already missing from the original.
How this works: your file is uploaded over HTTPS and converted on this server with open-source engines (libvips for images, FFmpeg for audio and video, LibreOffice and Pandoc for documents, Calibre for ebooks, Ghostscript and Inkscape for PDF and vector files). Images are processed in memory; other files use a private temporary folder that is deleted as soon as the conversion finishes.