A daily updated filename extension database!

FNM file extension

The table below provides useful information about the .fnm file extension. It answers questions such as:

  • What is the .fnm file?
  • What program do I need to open a .fnm file?
  • How can the .fnm file be opened, edited or printed?
  • How can I convert .fnm files to another format?

We hope you find this page helpful and a valuable resource!

2 extension(s) and 0 alias(es) found in database

✅ Lucene Field Name Data

Lucene Field Name Data .fnm file icon
FNM file is a Lucene Field Name Data. Apache Lucene is a free/open source information retrieval software library, originally created in Java by Doug Cutting.
Category: Data files
Application: Apache Lucene
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
FNM aliases:
FNM related links:
FNM related extensions:
Lucene 2 Compound File

Lucene Single Compound File

Lucene Frequencies File

Lucene Positions File

Lucene Norms File

Lucene Field Data

Lucene Field Index

Lucene Term Infos

Lucene Term Info Index

Lucene Term Vector Index

✅ SOBEK Filenames Data

SOBEK Filenames Data .fnm file icon
FNM file is a SOBEK Filenames Data. SOBEK is a modelling suite for flood forecasting, optimization of drainage systems, control of irrigation systems, sewer overflow design, river morphology, salt intrusion and surface water quality.
FNM format description not yet available
Category: Data files
Application: SOBEK
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
FNM aliases:
FNM related links:
FNM related extensions:
SOBEK Rainfall Series Data

SOBEK Wind Data

SOBEK History Data

SOBEK Debug Data

SOBEK Real-time Control Data

SOBEK Communications Data

SOBEK Water Quality Locations Data

SOBEK Digital Elevation Map Data

SOBEK RTC Communication Data

Other types of files may also use the .fnm file extension.

🚫 The .fnm file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

cnm, dnm, enm, fbm, fhm, fm, fmm, fn, fnk, fnl, fnn, gnm, nfm, nm, tnm

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

eNewsletter Manager Message Data
CADfix Command Level Log
RM Number Magic Document
GCL Cross Referencing Data
Fuzzy Pixmap Manipulation Image
FileMaker Pro Data
Synopsys Synplify Time Names Data
FunkTracker Music Module
FREE!ship Ship Model
FreeMind MindMap

🔴 Can't open a .fnm file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .fnm file association, check the FAQ.

🔴 Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .fnm file extension, write to us!

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