If you are seeking information about file extensions, then you are in the right place at the right time.

Details of extension .fm3

On this page, we're going to take a closer look at the .fm3 file extension.

We'll explain what exactly a .fm3 file format is and how you can use it. If you're interested in learning more details about this type of file, we'll show you where to find them. And if you ever need to convert .fm3 files into different formats, we'll give you some tips on how to do that too.

Let's see the 3 file formats associated with this file extension!


  1. FileMaker v3 Database
  2. FCEUX 3 Movie Capture
  3. Lotus 1-2-3 Worksheet Formatting Data

We trust that our website will provide valuable information for you. If you have any questions, just ask!

FileMaker v3 Database

fm3 file - FileMaker v3 Database
The FM3 file belongs to the Data category and works with FileMaker Pro, being used as a FileMaker v3 Database. FileMaker Pro is a database application from FileMaker Inc. The developer is still actively supporting the FileMaker Pro, likely. Our data shows that FileMaker Pro uses 43 more file types.
Application: FileMaker Pro
Program name: -
Category: Data files
Mime-type: application/octet-stream
Related extensions:
.clr FileMaker Pro Spelling Dictionary
.xmlo FileMaker Pro Layout Object Data
.fmxt FileMaker Pro for Mac Extension
.xmsc FileMaker Pro XML Export Script

FCEUX 3 Movie Capture

fm3 file - FCEUX 3 Movie Capture
The FM3 file belongs to the Data category and works with FCEUX, being used as a FCEUX 3 Movie Capture. FCEUX is a Nintendo Entertainment System (NES), Famicom, and Famicom Disk System (FDS) emulator. It supports both PAL (European) and NTSC (USA/JPN) modes. The developer is still actively supporting the FCEUX, likely. Our data shows that FCEUX uses 5 more file types.
Application: FCEUX
Program name: -
Category: Data files
Mime-type: application/octet-stream
Related extensions:
.fm2 FCEUX 2 Movie Capture
.fcm FCEUX FCE-Ultra Capture Movie
.fc1 FCEUX Saved State
.tht FCEUX Text Hooker Table Data

Lotus 1-2-3 Worksheet Formatting Data

fmt file - Lotus 1-2-3 Worksheet Formatting Data
The FMT file belongs to the Document category and works with Lotus 1-2-3, being used as a Lotus 1-2-3 Worksheet Formatting Data. Lotus 1-2-3 is a spreadsheet program designed for IBM-compatible personal computers by Lotus Corporation in 1982. The developer no longer updates Lotus 1-2-3 and does not provide support anymore. Our data shows that Lotus 1-2-3 uses 22 more file types.
Application: Lotus 1-2-3
Program name: -
Category: Document files
Mime-type: application/vnd.lotus-1-2-3
all, fm2, fm3
Related extensions:
.xlk Microsoft Excel XLS Backup
.sls3 Microsoft Excel 3 for Mac Template
.csv Comma-Separated Values Data
.silk Microsoft Excel Symbolic Link

The .fm3 file extension might not only belong to a single type of file, there could be various kinds that use it. Keep in mind that files with the .fm3 extension may contain various content types. If you have helpful information about this extension, write to us!

Could someone have spelled the .fm3 file extension wrong?

In our database, we came across the following similar extensions:

.rm3 RAMbrandt Picture
.fmw FME Workbench
.fj3 Lotus 1-2-3 Worksheet
.dm3 Gatan DigitalMicrograph 3 Image
.mf3 Ensoniq MR 76 Audio Data
.fmr Pro/ENGINEER FMR Data

The .fm3 extension is frequently misused

People sometimes confuse the .fm3 filename extension. Based on the searches on our site, here are the most common misspellings from the past year.

fn3 (1), fl3 (1), dm3 (1), tm3 (1), fmw (1), f3 (1), bm3 (1), rm3 (1), fmr (1), gm3 (1)

Having trouble opening a .fm3 file?

If you want to open a .fm3 file on your computer, you just need to have the appropriate program installed. Incorrect settings for the .fm3 association can trigger this error.

Windows can't open this file:

File: example.fm3

To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select from a list of programs that are installed on your computer.

To change file associations:

  • Right-click a file with the extension whose association you want to change, and then click Open With.
  • In the Open With dialog box, click the program with which you want the file to open, or click Browse to locate the program that you want.
  • Select the Always use the selected program to open this kind of file check box.

Supported operating systems

Windows Server 2016/2019/2022, Windows 7, Windows 8, Windows 10, Windows 11, Linux, Mac OS X, macOS, iOS, Android