Open 123 files in your browser
The workbook of Lotus 1-2-3, the spreadsheet that made the IBM PC a business machine. Open one right here, every sheet, with no Lotus. 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 123
Lotus 1-2-3 ruled spreadsheets through the 1980s, and its later versions kept a following into the 2000s. Release 3 brought workbooks of several sheets in 1989, saved as .wk3, 1-2-3 for Windows saved .wk4, and 1-2-3 97 and Millennium Edition saved .123, all in the same family of records.
A workbook holds each sheet's cells with their values, labels and formulas, number formats, fonts and column widths, and named ranges. IBM, which bought Lotus, ended 1-2-3 in 2014, and Microsoft Office stopped opening Lotus files with Office 2013, so a WK4 from an old budget or model has nowhere obvious to go.
Filepeek reads the workbook with libwps, the open source reader LibreOffice uses, compiled to WebAssembly, and draws every sheet in a grid of its own with its tabs along the bottom. Show formulas reveals what's behind each value, Show as a table sorts, filters and searches a sheet, and Export saves sheets as CSV.
Lotus 1-2-3 workbook
.123 • .wk3 • .wk4
Format
- MIME type
- application/vnd.lotus-1-2-3
- Made by
- Lotus Development, then IBM
- Released
- 1989
Inside the file
- Sheets
- Several in one workbook
- Cells
- Values, labels and formulas
- Look
- Number formats, fonts and widths
- Written by
- 1-2-3 release 3 to Millennium
Opens in every browser
Filepeek opens Lotus 1-2-3 workbooks 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 123
- 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 .123 or .wk4 file?
Microsoft Office stopped opening Lotus 1-2-3 files with Office 2013. Drop the file here instead: every sheet shows, and Export saves sheets as CSV, which Excel opens.
Are the formulas kept?
Yes. Values show as 1-2-3 saved them, and Show formulas reveals the formula behind each one. Nothing is worked out again.
What about older WK1 files?
They open too, from Lotus 1-2-3 release 2 for DOS. See WK1.