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WK3 XLSX
Free online converter

Convert WK3 to XLSX

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WK3 to XLSX converterFREE
Drop a .WK3 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 WK3 to XLSX

  1. Add your .WK3 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

  • The spreadsheet stays functional: cells, values and layout carry over into the modern XLSX workbook.
  • Lotus 1-2-3 formula syntax differs from Excel's, so some formulas may need review after conversion.
  • XLSX cannot hold macros, and WK3 is a legacy format, so treat the conversion as a recovery-and-verify step.

Frequently asked questions

How faithful is the conversion?
WK3 and XLSX are both spreadsheet formats, so the cell grid, values and layout transfer well and the file remains a live workbook. XLSX is the modern ZIP-based Office Open XML format, giving a well-supported result.
Why convert WK3 to XLSX?
WK3 is a discontinued Lotus 1-2-3 format that modern software rarely opens, while XLSX is today's standard Excel workbook. Converting rescues the data into the current, widely supported spreadsheet format.
Where can I open the XLSX?
XLSX opens in current desktop spreadsheet apps, online sheet editors and mobile apps, no Excel purchase required. It is the default spreadsheet format most tools expect today.
What should I double-check?
Lotus 1-2-3 formulas may not map one-to-one onto Excel functions, so review calculated cells after converting. Plain values and the table structure carry over reliably; legacy Lotus features are the likeliest to need attention.
Learn about the formats: .WK3 · .XLSX
Programs that convert WK3: Microsoft Excel · Corel Quattro Pro · Apache OpenOffice Calc (OpenOffice.org Calc) · LibreOffice Calc