123 XLS
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Convert 123 to XLS

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123 to XLS converterFREE
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Tested on macOS, Windows & Linux
Last verified Oct 2026

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How to convert 123 to XLS

  1. Add your .123 file - drop it in the box above or click to browse.
  2. Convert it to .XLS in a few seconds.
  3. Download your new .XLS file.

What to expect

  • Modern Microsoft Excel (2007 and later) cannot open .123 files - Lotus import was removed; always convert through LibreOffice or Gnumeric first.
  • Lotus-specific @functions (e.g. @DSUM, date variants) may become static values rather than working formulas - spot-check key cells after conversion.
  • .xls caps at 65,536 rows and 256 columns per sheet; if your data fits those limits you are fine, but XLSX is the better long-term target.

Frequently asked questions

Can modern Excel open .123 files?
No - Microsoft removed Lotus import filters after Excel 2003. Convert to .xls or .xlsx first using LibreOffice Calc or Gnumeric, then open the result in Excel.
Will charts from the .123 file carry over?
Lotus charts rarely survive conversion accurately - expect to recreate them in Excel after the data has been converted.
Should I save as XLS or XLSX?
Use XLSX unless you specifically need Excel 97-2003 compatibility - it supports far more rows (1,048,576 vs 65,536) and is better supported by modern tools.
Will multiple sheets be preserved?
Yes - LibreOffice Calc preserves the multi-sheet structure when saving to .xls; verify sheet names and counts after saving.
Learn about the formats: .123 · .XLS
Programs that convert 123: Corel Quattro Pro · LibreOffice Calc