WK1 to XLSX Converter
Convert your WK1 Lotus 1-2-3 spreadsheet into an editable XLSX workbook for Excel and Google Sheets. Secure processing, free downloads, no account required.
Drop your WK1 files here
Up to 50MB per file.
Files are encrypted and auto-deleted after conversion
How to Convert
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Upload your WK1 files
Drag and drop or select WK1 files from your device. You can upload multiple files at once.
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Configure Output
Start the conversion. Crest Convert will prepare the XLSX file using the appropriate format engine.
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Download XLSX files
Once conversion finishes, download your files individually or as a compressed ZIP archive.
Why convert WK1 to XLSX?
WK1 is a Lotus 1-2-3 version 2 worksheet used for calculations, tables, financial data, and archives. Converting it to XLSX creates the current Microsoft Excel workbook format with worksheets, formulas, and formatted cells, ready for workflows that use the destination format.
XLSX opens in Microsoft Excel, Google Sheets, Apple Numbers, and LibreOffice Calc.
Frequently Asked Questions
How do I convert WK1 to XLSX?
Add your WK1 spreadsheet, start the conversion, and download a genuine editable XLSX workbook ready for compatible spreadsheet apps.
What is a WK1 file?
WK1 is a Lotus 1-2-3 version 2 worksheet format used for tables, formulas, financial models, business records, and archived spreadsheet data.
What does converting WK1 to XLSX do?
The converter reads the legacy Lotus worksheet and creates a genuine editable XLSX workbook ready for compatible spreadsheet apps.
Can I edit the converted XLSX file?
Yes. The converter creates a genuine XLSX file with supported cells, values, structure, and formatting ready for compatible apps.
Can I convert several WK1 files?
Yes. Add multiple WK1 files and download a separate XLSX result for each spreadsheet.
Is WK1 to XLSX conversion secure?
Yes. Files are transferred over an encrypted connection, processed securely, and automatically removed after conversion. No account is required.