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WK1 to JSON converter

Convert Lotus 1-2-3 worksheet (.wk1) to JSON 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 guide

JSON .json

Structured data represented using objects, arrays, and values.

JSON file format guide

How to convert WK1 to JSON

  1. Select WK1 files from your device or drag them into the converter.
  2. Check the JSON output. Open conversion settings if you want to make adjustments.
  3. 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.

Convert from WK1

WK1 to CSVWK1 to TSVWK1 to JSONWK1 to XLSXWK1 to XLSWK1 to ODSWK1 to HTMLWK1 to XLSBWK1 to XLSMWK1 to DBFWK1 to DIFWK1 to SYLK

Convert to WK1

CSV to WK1TSV to WK1XLSX to WK1XLS to WK1ODS to WK1XLSB to WK1XLSM to WK1DBF to WK1DIF to WK1SYLK to WK1FODS to WK1WK3 to WK1

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