A practical matrix for converting legacy Lotus 1-2-3 spreadsheet files into modern review, archive, and analytics formats.
Supported Lotus-family inputs include .123, .wk1, .wk3, .wk4, .wks, .wb1, .wb2, and .wb3. These are common in archives created by Lotus 1-2-3, Lotus Symphony-era workflows, and older spreadsheet export pipelines.
Export to XLSX for modern spreadsheet review, XLS for older Excel workflows, CSV for analytics and database import, PDF for fixed archive records, HTML for browser-readable review, and Markdown for text-first AI/RAG preparation.
For migration projects, create XLSX and PDF together. For data engineering, pair CSV with Markdown. For records retention, keep originals plus a PDF snapshot and conversion log.