WK1 to XLS 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
What is a XLS file?
XLS is the proprietary spreadsheet format used by Microsoft Excel prior to the introduction of XLSX in 2007. It uses a binary file structure and supports formulas, charts, macros, and formatting.
XLS files remain widely compatible and are still used in many organizations. However, XLSX offers better performance and security.
How to open XLS files
XLS files can be opened using Microsoft Excel, Google Sheets, LibreOffice Calc, and other spreadsheet applications. They support charts, formulas, and formatting.
To ensure compatibility and security, convert XLS to XLSX or ODS using AnyConv or within Excel itself.
Key facts about XLS
- Full name: Microsoft Excel Binary File Format
- Extension: .xls
- MIME type: application/vnd.ms-excel
- Developed by: Microsoft
- Initial release: 1987
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❓ Frequently Asked Questions
- Do I need to register to convert WK1 files?Not at all! You can convert WK1 to XLS without signing up or installing anything.
- Is it safe to convert WK1 to XLS on AnyConv?Absolutely. All WK1 and XLS files are securely handled and automatically deleted after 1 hour. Nobody can access your data.
- Will the quality change after converting WK1 to XLS?We do our best to preserve the original quality during WK1 to XLS conversion. The result is accurate and clean.
- How long does it take to convert WK1 to XLS?Most conversions from WK1 to XLS take just a few seconds — even for larger files.
- Can I upload more than one WK1 file?Yes, batch conversion is supported. You can convert multiple WK1 files to XLS at once — fast and easy.
- What browsers support WK1 to XLS conversion?All modern browsers! Chrome, Firefox, Safari, Edge — AnyConv runs online and supports converting WK1 to XLS on any platform.