XLSX .xlsx
An Office Open XML workbook. Table previews show stored values, without recalculating formulas.
XLSX file format guideXLSX to WK3 converter
Convert XLSX (.xlsx) to WK3 for free. Choose files, review the available settings and download your results. No account needed.
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Lotus 1-2-3 workbook .wk3
A later Lotus 1-2-3 workbook format using binary spreadsheet records. It supports moving legacy workbook data into modern table formats.
Exports stored values in up to 8,192 rows, 256 columns and 256 sheets. Formatting, formulas and macros are not retained. Some legacy readers require a character-set choice for multilingual text.
WK3 file format guideHow to convert XLSX to WK3
- Select XLSX files from your device or drag them into the converter.
- Check the WK3 output. Open conversion settings if you want to make adjustments.
- Convert, compare the original and result, then download your files.
Quality, compatibility and file limits
Choose a sheet for CSV, TSV, JSON, HTML, DBF, DIF, SYLK, or WK1 output. Workbook formats export stored cell values. Formulas are not recalculated; macros, charts, and original styling are not preserved.
Processing uses your device when possible and our servers when required. Browser files are limited to 256 MB each; server conversions to 64 MB; browser spreadsheets to 32 MB. Previews show supported content and do not guarantee identical rendering in every application.