Online WK1 Converter
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What is a WK1 file?
WK1 is a spreadsheet file format used by Lotus 1-2-3, one of the earliest popular spreadsheet programs. It stores data in rows and columns along with simple formulas.
Although now obsolete, WK1 was a foundational format in business computing. Some modern spreadsheet programs still offer support for reading and converting these legacy files.
How to open WK1 files
WK1 files can be opened with older versions of Lotus 1-2-3, or with modern tools like LibreOffice Calc and some versions of Microsoft Excel.
You can convert WK1 to XLS or CSV using AnyConv or by importing the file into compatible spreadsheet software.
Key facts about WK1
- Full name: Lotus 1-2-3 Spreadsheet
- Extension: .wk1
- MIME type: application/vnd.lotus-1-2-3
- Developed by: Lotus Development Corporation
- Initial release: 1983
Useful links and resources
Convert from WK1
Quickly turn your WK1 files into any format you need
❓ Frequently Asked Questions
Answers to common questions about WK1
- Do I need to install software to convert WK1 files?No, you don’t need to install anything. AnyConv converts WK1 files directly in your browser — no downloads required.
- Can I use WK1 converter on my phone or tablet?Yes, you can convert WK1 files on any device — including phones and tablets. AnyConv works perfectly on mobile.
- Is it safe to convert WK1 files with AnyConv?Yes, converting WK1 files with AnyConv is secure. All files are automatically deleted after conversion and never shared.
- Can I convert multiple WK1 files at once?Yes, our converter supports batch processing. You can upload several WK1 files and convert them all at once.