Convert Lotus 1-2-3 to CSV
Extract clean, importable data from Lotus 1-2-3 spreadsheets — in bulk, offline — ready for databases, scripts, and modern tools.
TL;DR
Lotus 1-2-3 Converter batch-extracts the data from .wk1/.wk3/.wk4/.123 files into clean CSV — no Lotus codes, no binary. Perfect for database imports, data migration, and scripting. Free trial covers 10 files.
How to convert Lotus 1-2-3 to CSV — step by step
Install Lotus 1-2-3 Converter (free trial)
Download the offline Windows installer. The trial converts 10 files with all features.
Point it at your archive
Select a folder and the converter recursively finds every Lotus 1-2-3 spreadsheet inside — even files with missing or wrong extensions.
Choose CSV output
Select CSV. Need the workbooks in editable form too? Add XLSX output in the same run.
Convert and load the data
Thousands of files convert in one pass, locally and in parallel. Import the CSVs into your database, notebook, or BI tool.
Why convert Lotus 1-2-3 files to CSV?
CSV is the universal data interchange format: every database, spreadsheet, and programming language reads it. Converting Lotus 1-2-3 archives to CSV makes decades of tabular data instantly importable into the systems you use today.
For data migrations and ETL work, CSV is the cleanest handoff — no proprietary format to wrestle with, just rows and columns ready to load into Postgres, pandas, Power BI, or anything else.
Safer than online Lotus converters
Searching for a "free online Lotus 1-2-3 converter" means uploading your spreadsheets to someone else's server — a real problem for financial models, ledgers, and any confidential data. Lotus 1-2-3 Converter runs entirely on your Windows PC: files are converted locally and never leave your machine. It also handles thousands of files in one batch, which no upload-one-file-at-a-time website can do.
The free trial converts up to 10 files with every feature enabled — for most people that's the whole job. Larger archives are covered by a one-time Standard license from $39.95. No subscription, no watermarks, no uploads.
Frequently asked questions
Is there a free way to convert Lotus 1-2-3 files to CSV?
Yes. The free trial of Lotus 1-2-3 Converter converts up to 10 files with full features — no signup, no watermarks. For unlimited conversions, Standard is a one-time $39.95 personal license (no subscription).
Is this an online converter? Do my spreadsheets get uploaded?
No. Lotus 1-2-3 Converter is a Windows desktop app — every conversion runs 100% locally on your PC. Nothing is uploaded, which matters for financial models, ledgers, and other confidential spreadsheets that shouldn't be pasted into a random website.
Can I convert an entire folder of Lotus files at once?
Yes. Point Lotus 1-2-3 Converter at a folder (it scans subfolders recursively), select CSV as the output, and it batch-converts everything — thousands of .wk1, .wk3, .wk4, and .123 files in one run.
Which Lotus 1-2-3 file formats are supported?
The classic Lotus 1-2-3 formats — .wks, .wk1, .wk3, .wk4, and .123 — from the DOS and Windows eras, including files with missing or incorrect extensions.
What happens to multiple sheets in one Lotus file?
Multi-sheet Lotus workbooks are handled per-sheet on export so each tab’s data lands in a clean, importable CSV.
Related
Unlock the data inside your Lotus archive
Free trial converts 10 files to CSV — batch, offline, and clean output.
Free trial
Full app features — up to 10 files
Windows 10 or 11
One offline installer. Same full-feature trial — convert up to 10 Lotus files locally.
Offline MSI · no account required