How to open a .FM3 file online
Three steps, a few seconds, no Excel.
Choose your .FM3 file
Drag your .FM3 file onto the box above, or click Choose file.
Supported
Your .FM3 file is opened: every sheet, formula and merged range.
Browse, search, export
Switch sheets, click a cell to see its formula, search the whole sheet and export it as CSV or JSON.
What is a .FM3 file?
Everything worth knowing about Lotus 1-2-3 release 3.x spreadsheet file files.
An .FM3 file is a Lotus 1-2-3 spreadsheet format file developed by IBM. These files are categorized as settings files and contain data related to spreadsheet configurations. They can be opened and viewed using Microsoft Excel.
Programs that open .FM3 files
| Developer | IBM |
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Related viewers
Other free viewers for related formats.
Is my .FM3 file uploaded anywhere?
No. Your .FM3 file is opened for you.
Are formulas recalculated?
The viewer shows the values Excel or LibreOffice saved in the file, plus the formula behind each cell when you click it. It doesn't recalculate, so what you see is exactly what the author saw when saving.
Can I open a password-protected .FM3 file?
Not yet. Files encrypted with a password to open are detected and reported; sheets that are only "protected against editing" open normally.
Why doesn't my chart or image show?
This viewer focuses on cell data: values, formulas, merged cells and fill colours. Charts, images and pivot table layouts are not drawn yet.
How big a file can I open?
Up to 50 MB. Large sheets are shown 500 rows at a time so your browser stays fast. Search still covers every row.
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