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123 XLSX
Free online converter

Convert 123 to XLSX

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123 to XLSX converterFREE
Drop a .123 file here
or pick one - we convert it to .XLSX and give you the file to download

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Tested on macOS, Windows & Linux
Last verified Oct 2026

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How to convert 123 to XLSX

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

What to expect

  • Microsoft Excel dropped Lotus import support after Excel 2003 - Excel 2007 and later cannot open .123 files at all, so you need an intermediate tool.
  • Lotus-specific @functions such as @DSUM or @DAVG may convert to static values or display as errors in Excel; always check formula results after converting.
  • Multi-sheet (3D) .123 workbooks are supported - LibreOffice preserves the full sheet structure in the exported .xlsx.

Frequently asked questions

Can Microsoft Excel open a .123 file directly?
No - Excel removed its Lotus import filters in Excel 2007. You need LibreOffice Calc, OpenOffice Calc, or our converter as an intermediate step.
Will I lose data when converting from .123 to XLSX?
Cell values and most formatting transfer cleanly. The main risk is Lotus-specific @functions that have no direct Excel equivalent - these may become static values or errors in the converted file.
Can I open the converted .xlsx in Google Sheets?
Yes - once you have an .xlsx file, upload it to Google Drive or use Google Sheets' File > Import to open it.
What if LibreOffice shows garbled text in my .123 file?
Try Apache OpenOffice Calc as an alternative - it has its own Lotus importer and may handle edge cases such as non-standard character encoding differently.
Learn about the formats: .123 · .XLSX
Programs that convert 123: Corel Quattro Pro · Apache OpenOffice Calc (OpenOffice.org Calc) · LibreOffice Calc