CSV to XLS

Upload your CSV file (max 5MB) and download it in the classic XLS (Excel 97-2003) format.

About CSV to XLS Conversion

This tool allows you to convert CSV (Comma-Separated Values) files to XLS (Excel 97-2003) format quickly and easily. The conversion is done entirely in your browser - no files are uploaded to any server.

Features

  • Local Processing: All conversion happens in your browser
  • Privacy: No data is sent to any server
  • Fast: Instant conversion for files up to 5MB
  • Simple: Just upload and download - no complex settings
  • Legacy Support: Creates files compatible with Excel 97-2003

How to Use

  1. Click the upload area or drag and drop your CSV file
  2. Wait for the file to be processed
  3. Click the "Download XLS" button when it appears
  4. Find your converted file in your downloads folder

CSV File Requirements

  • Must be a valid CSV file with the .csv extension
  • File size must be under 5MB
  • Should have a header row with column names
  • Data should be properly comma-separated
  • Text containing commas should be properly quoted

Note About XLS Format

The XLS format is the classic Excel format used in versions 97-2003. While it offers good compatibility with older software, it has some limitations compared to newer XLSX format:

  • Maximum of 65,536 rows per sheet
  • Maximum of 256 columns per sheet
  • Limited formatting options

If you don't need compatibility with older Excel versions, consider using our CSV to XLSX converter instead.