Open WKS files in your browser
The spreadsheet of Microsoft Works, and of the first Lotus 1-2-3 before it. Open one right here, now that Excel no longer does. Nothing leaves your device.
Or drop it anywhere on this page
What you'll see
Your workbook opens at the sheet it was saved on, drawn as its app draws it, with its tabs along the bottom.
- Every sheet • Formats, merges and frozen panes
- Show formulas • Behind every value
- Show as a table • Sort, filter and search
- Export • Save a sheet or all of them as CSV
About WKS
Microsoft Works came on millions of new PCs from 1987 to 2007, a cheap suite of a word processor, a spreadsheet and a database, and its spreadsheets were .wks files up to Works 4. Lotus 1-2-3 release 1A had used .wks years before, for its own worksheets.
Both are worksheets of cells in rows and columns, with values, labels and formulas, their number formats and column widths. Microsoft Office stopped opening Works files and Lotus 1-2-3 worksheets with Office 2013, so an old budget or grade book in a WKS has no Microsoft app left to open it.
Filepeek reads the worksheet with libwps, the open source reader LibreOffice uses, compiled to WebAssembly, and draws every cell with its value, format and width in a grid of its own. Show formulas reveals what's behind each value, Show as a table sorts, filters and searches it, and Export saves it as CSV.
Works spreadsheet
.wks
Format
- MIME type
- application/vnd.ms-works
- Made by
- Microsoft, and Lotus before it
- Released
- 1987
Inside the file
- Cells
- Values, labels and formulas
- Look
- Number formats and column widths
- Written by
- Works 1 to 4, and Lotus 1-2-3 1A
- Next
- Works 5 and later saved XLR
Opens in every browser
Filepeek opens WKS files in Chrome, Edge, Firefox and Safari. Excel no longer opens them, and browsers only download them.
- YouChromeOpens through Filepeek
- YouEdgeOpens through Filepeek
- YouFirefoxOpens through Filepeek
- YouSafariOpens through Filepeek
Apps that open WKS
- WindowsLibreOffice Calc opens it • Excel stopped with Office 2013
- MacLibreOffice Calc opens it
- iPhone and iPadNo app built in opens it
- AndroidNo app built in opens it
Questions
Why won't Excel open my WKS file?
Microsoft Office stopped opening Works spreadsheets and Lotus 1-2-3 worksheets with Office 2013. Drop the file here instead: every cell shows, and Export saves the sheet as CSV, which Excel opens.
Is my WKS from Works or from Lotus 1-2-3?
Either opens, and Filepeek tells them apart by their bytes. Show details names the app that wrote it.
Are the formulas kept?
Yes. Values show as they were saved, and Show formulas reveals the formula behind each one. Nothing is worked out again.