WK1 to XLS Converter
Convert your WK1 Lotus 1-2-3 spreadsheet into a compatible XLS spreadsheet for established Excel workflows. 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 XLS file using the appropriate format engine.
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Download XLS files
Once conversion finishes, download your files individually or as a compressed ZIP archive.
Why convert WK1 to XLS?
WK1 is a Lotus 1-2-3 version 2 worksheet used for calculations, tables, financial data, and archives. Converting it to XLS creates the legacy Microsoft Excel workbook format used by older spreadsheet systems, ready for workflows that use the destination format.
XLS opens in Microsoft Excel and office suites that support legacy workbooks.
Frequently Asked Questions
How do I convert WK1 to XLS?
Add your WK1 spreadsheet, start the conversion, and download a genuine editable XLS 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 XLS do?
The converter reads the legacy Lotus worksheet and creates a genuine editable XLS workbook ready for compatible spreadsheet apps.
Can I edit the converted XLS file?
Yes. The converter creates a genuine XLS 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 XLS result for each spreadsheet.
Is WK1 to XLS conversion secure?
Yes. Files are transferred over an encrypted connection, processed securely, and automatically removed after conversion. No account is required.