WK1 to XLSX 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 XLSX file?
XLSX is the default spreadsheet format used by Microsoft Excel since Office 2007. It is based on the Open XML standard and stores data in cells organized by rows and columns.
XLSX files support formulas, charts, formatting, and large data sets. They are widely used for financial modeling, data analysis, and record keeping across industries.
How to open XLSX files
XLSX files can be opened with Microsoft Excel, Google Sheets, LibreOffice Calc, and many other spreadsheet applications. They are the standard format for spreadsheets today.
You can convert XLSX to PDF, CSV, or XLS using AnyConv or via built-in export options in Excel and other tools.
Key facts about XLSX
- Full name: Microsoft Excel Open XML Spreadsheet
- Extension: .xlsx
- MIME type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
- Developed by: Microsoft
- Initial release: 2007
Useful links and resources
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❓ Frequently Asked Questions
- Do I need to register to convert WK1 files?Not at all! You can convert WK1 to XLSX without signing up or installing anything.
- Is it safe to convert WK1 to XLSX on AnyConv?Absolutely. All WK1 and XLSX files are securely handled and automatically deleted after 1 hour. Nobody can access your data.
- Will the quality change after converting WK1 to XLSX?We do our best to preserve the original quality during WK1 to XLSX conversion. The result is accurate and clean.
- How long does it take to convert WK1 to XLSX?Most conversions from WK1 to XLSX 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 XLSX at once — fast and easy.
- What browsers support WK1 to XLSX conversion?All modern browsers! Chrome, Firefox, Safari, Edge — AnyConv runs online and supports converting WK1 to XLSX on any platform.