How to convert your WK1 file
- Click the "Select File" button above, and choose your WK1 file.
- You'll see a preview.
- Click the "Convert file to..." button to save your file in the format you want.
Convert WK1 to another file type
The converter easily converts your WK1 file to various formats - free and online. No Excel or extra software needed.
- WK1 to XLS
- WK1 to XLSX
- WK1 to XLSM
- WK1 to XLSB
- WK1 to ODS
- WK1 to CSV
- WK1 to TSV
- WK1 to TAB
- WK1 to DIF
- WK1 to SLK
- WK1 to WK3
- WK1 to NOTES
Convert a file to WK1
The converter also works in reverse, so you can convert other Spreadsheet formats to WK1 with high quality output.
- WQ1 to WK1
- XLSM to WK1
- NOTES to WK1
- QPW to WK1
- WK3 to WK1
- WB2 to WK1
- WKS to WK1
- XLSB to WK1
- 123 to WK1
- XLS to WK1
- WB1 to WK1
- XLSX to WK1
About WK1 files
A .WK1 file is a legacy spreadsheet document created by Lotus 1-2-3, specifically associated with Release 2.x of the software. It stores financial data, formulas, and macros in a binary grid format composed of rows and columns. While Lotus 1-2-3 was once the dominant spreadsheet application on DOS-based systems, the format is now effectively obsolete. Users attempting to access these files today encounter significant friction: modern iterations of Microsoft Excel have deprecated native support for opening older Lotus formats due to security policies and architectural updates, often displaying errors or requiring "Legacy File Block" settings to be disabled. Additionally, .WK1 files lack compatibility with modern formatting standards, Unicode text, and large datasets. To ensure data accessibility and security, migration is essential. For continued editing and calculation, convert your files to XLSX or ODS. For data ingestion into databases or web applications, convert to CSV. For immutable archiving of the historical data, convert to PDF.
Use Convert.Guru to open and convert your WK1 file.
Users also converted WK4, WK3, FMT, WQ1, 123, PNG, PDF, FM3 and XLS files.
The WK1 Converter Story
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our WK1 converter.