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File Extensions

Clear explanations, compatible software, and practical guidance for file extensions.

753
Indexed file extensions

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753 extensions
.NASM

Netwide Assembler Source Code File

Programming
.X64

64-bit Binary Executable File

Executable
.KAR

MIDI Karaoke File

Audio
.VCXPROJ

Visual C++ Project

Programming
.MLYACC

ML-Yacc Parser Generator Input

Programming
.MMAP

MindManager Map File

Data
.AAF

Advanced Authoring Format

Video
.PJX

Visual FoxPro Project File

Programming
.TFX

TensorFlow Extended Pipeline Metadata

Data
.WIM

Windows Imaging Format

Archive
.ESL

E-Prime Experiment File

Data
.HSF

HOOPS Stream Format

Data
.FR3

FastReport Form File

Data
.SF3

SoundFont 3 Audio Bank

Audio
.S2ML

SAS Strategy Management Markup Language

Data
.ADG

Ableton Device Group

Data
.S01

Split Multi-volume Compressed Archive Part 1

Archive
.FSX

F# Script File

Programming
.LSP

Lisp Source Code File

Programming
.CSPROJ.USER

Visual Studio Project User Options File

Programming
.FSA

FASTA Sequence File

Data
.PDB

Protein Data Bank File

Data
.DOTX

Microsoft Word Open XML Template

Data
.MLL

Autodesk Maya Link Library

Executable

Frequently Asked Questions

Everything you need to know about file extensions

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Each listing provides a definition of the file extension, common use cases, compatible software, supported platforms, and related or alternative formats.

The database is updated regularly to reflect new file extensions, changes in software compatibility, and evolving file format standards.