CSV .csv
Tabular text with comma-separated fields. Formatting and multiple sheets are not preserved.
CSV file format guideCSV to WK1 converter
Convert CSV (.csv) to WK1 for free. Choose files, review the available settings and download your results. No account needed.
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Lotus 1-2-3 worksheet .wk1
A legacy Lotus 1-2-3 worksheet format. Converting WK1 files to CSV or XLSX can make old table data accessible in current spreadsheet tools.
Single-sheet export with legacy row and column limits. Cell values are retained; original presentation and formulas are not.
WK1 file format guideHow to convert CSV to WK1
- Select CSV files from your device or drag them into the converter.
- Check the WK1 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.