Lotus 1-2-3 version 3.x spreadsheet
File type: Spreadsheet and workbook file
An fm3 file is a spreadsheet created by Lotus 1-2-3 version 3.x.
It is an obsolete Lotus 1-2-3 spreadsheet file used to store worksheet data.
Found 3 different file type records with the same fm3 filename suffix.
File type category:
Spreadsheet and workbook file
Date updated: October 11, 2026
Record marked as obsolete and not updated for a long time.
Lotus 1-2-3 was spreadsheet software from Lotus Development Corporation. The fm3 file extension was used for spreadsheets created by Lotus 1-2-3 release 3.x, including worksheet data and its associated spreadsheet content.
The format is associated with the following MIME types: application/vnd.lotus-1-2-3 and application/x-123. It was used by older Lotus 1-2-3 software for Microsoft Windows and is now considered obsolete.
Microsoft Excel 2007 and Excel 2010 do not support this format. Earlier spreadsheet software may open an fm3 file, but formatting and other content may not be preserved completely.
Open an fm3 file with a compatible installation of Lotus 1-2-3, including the Microsoft Windows version associated with this format.
Some earlier spreadsheet programs may also open the file. Microsoft Excel 2007 and Excel 2010 do not support this format; earlier Excel releases may open it with some loss of formatting.
To convert an fm3 file, open it in a compatible version of Lotus 1-2-3 and save or export the spreadsheet to a format supported by the target spreadsheet program.
If Lotus 1-2-3 is unavailable, an earlier version of Microsoft Excel may work as an intermediary, but the resulting file should be checked for lost formatting or other spreadsheet content.
Software applications that can open fm3 files:
Microsoft Windows
Software applications that can edit fm3 files:
Microsoft Windows
Software capable of saving fm3 files:
Microsoft Windows
Software apps that create fm3 files:
Microsoft Windows
Software apps that print fm3 files:
Microsoft Windows
Software applications that handle other tasks involving fm3 files:
Microsoft Windows
File type category:
Database file
Date updated: November 6, 2026
The fm3 file extension identifies a database document created by FileMaker, Inc. with FileMaker Pro version 3. FileMaker Pro is used to create databases and custom database applications.
An FM3 document can contain database tables, fields, records, layouts and other elements of a FileMaker database application. It is a document format for the database itself rather than a general-purpose file for storing an exported table.
The format is obsolete and is no longer the normal format used by current FileMaker Pro releases. Its associated MIME type is application/filemaker.
Open an fm3 file with a compatible copy of FileMaker Pro version 3 for Windows or Mac OS. The file is intended to be opened as a database document in FileMaker Pro, not as a text file.
Current FileMaker Pro releases may not open this legacy format directly. If the file is not recognised, an older compatible FileMaker Pro installation may be required before converting or exporting the database.
Open the file in a compatible version of FileMaker Pro and use that software's conversion or export features where available.
Records can typically be exported to a structured data format, while reports can be printed or exported as PDF. PDF preserves a report's appearance but does not create an editable FileMaker database.
Software applications that can open fm3 files:
Microsoft Windows
Apple macOS / Mac OS X
Software applications that can edit fm3 files:
Microsoft Windows
Apple macOS / Mac OS X
Software capable of saving fm3 files:
Microsoft Windows
Apple macOS / Mac OS X
Software apps that create fm3 files:
Microsoft Windows
Apple macOS / Mac OS X
File type category:
Various data file
Date updated: November 29, 2024
The fm3 Harvard Graphics 3.0 device driver file type is probably or no longer supported file format.
This entry was verified by File-Extensions.org team. In time of research, there was not any internet resource to find out what kind of file type it is.
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Not possible to open fm3 extension file.
It is not convertable file format.
Online conversions and file conversion information are provided by 101convert.com.
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