FileExt.txt

Text File
	txt
	text
	wtx				Text Document
	doc

	Readme[.*]

2nd Text File
	log
	asc				PGP ASCII Armored File
	map				Linker map file
	bnf				BNF grammar

C/C++ Source
	c
	cpp
	cxx				C++ Source File
	cc				C++ Source File
	h				C/C++ Header File
	hpp				C++ Header File
	cppm			Clang C++ Module
	hxx				C++ Header File
	hh				C++ Header File
	inl				C++ Inline File
	ixx				Visual C++ Module interface
	pch				Precompiled Header File
		idl			Interface Definition Language
		odl			Object Definition Language
		midl		Microsoft Interface Definition Language
	m				Objective C Source File
	mm				Objective C++ Source File
	xpm				X11 Pixmap Graphic
	cl				OpenCL Source File
	cu				CUDA Source File
	cuh				CUDA Header File

	*.h.in

	[x] rs			Android RenderScript

C# Source
	cs
	csx				C# Script
	vala			GNOME Vala
	vapi			Vala API File

CSS Style Sheet
	css
	scss			Sassy CSS, https://sass-lang.com/
	less			Less CSS, https://lesscss.org/
	hss				HSS, https://github.com/ncannasse/hss
	wxss			WeChat Mini Program, https://developers.weixin.qq.com/miniprogram/dev/framework/view/wxss.html

Java Source
	java
	jad				Jad Decompiler
	aidl			Android IDL
	bsh				BeanShell

JavaScript
	js
	jse				JScript Encoded File
	jsm				JavaScript Module
	jsx				JavaScript with JSX
	cjs				CommonJS Module
	mjs				ECMAScript Module
	qs				Qt Installer Framework Script

JSON Document
	json
	har				Firefox -> Web Developer -> Network
	ipynb			Jupyter Notebook
	wxcp			CodeLite wxCrafter Resource
	jshintrc		JSHint Configuration File
	eslintrc		ESLint Configuration File, https://eslint.org/
	babelrc			Babel Configuration File, https://babeljs.io/
	prettierrc		Prettier Configuration File, https://prettier.io/
	stylelintrc		Stylelint Configuration File, https://stylelint.io/
	jsonld			JSON for Linked Data, https://json-ld.org/
	jsonc			JSON with Comments, https://code.visualstudio.com/docs/languages/json#_json-with-comments
	json5			JSON5, https://json5.org/
	arcconfig		Phabricator Arcanist
	arclint			Phabricator Arcanist
	jscop			JSCoP File, https://polly.llvm.org/documentation/passes.html

PHP Script
	php
	phps			PHP Source
	phpt			PHP Test Script
	phtml			PHP Web Page
	php_cs			PHP-CS-Fixer
	eyecode			eyeOS

Python Script
	py
	pyw
	pyx				Cython Implementation File
	pxd				Cython Definition File
	pxi				Cython Include File
	pyi				Stub File (PEP 484), https://www.python.org/dev/peps/pep-0484/#stub-files
	py3				used by some people for Python 3 code
	pth				Path Configuration File, https://docs.python.org/3.9/library/site.html
	boo				Boo
	empy			EmPy
	cobra			Cobra
	gs				GNOME Genie

	bzl				Bazel BUILD file, https://docs.bazel.build/versions/main/build-ref.html
	bazel
	BUILD
	mojo			https://docs.modular.com/mojo/programming-manual.html

Ruby Script
	rb
	ruby
	rbw
	rake			Ruby Makefile
	rjs				Ruby JavaScript
	gemspec 		RubyGems Specification
	podspec			CocoaPods

	Rakefile		Ruby Makefile
	Podfile			CocoaPods

	cr				Crystal		https://crystal-lang.org/

SQL Query
	sql
	mysql
	hsql			Apache Hive

Web Source Code
	html
	htm
	shtml			Server Side Include HTML File
	xhtml			Extensible Hypertext Markup Language File
	asp				Active Server Page
	aspx			Active Server Page Extended File
	jsp				Java Server Page
	rhtml			ERB, HTML with embedded Ruby
	mht				MHTML Web Archive
	htd				Adobe ExtendScript HTML file
	htt				Hypertext Template File
	hta				HTML Application
	htc				HTML Component File
	cfm				ColdFusion Markup File
	tpl				Document Template
	jd

XML Document
	xml
	xsl				XML Style Sheet
	xslt			XSL Transformation File
	xsd				XML Schema Definition
	dtd				Document Type Definition File
	rss				Rich Site Summary
	svg				Scalable Vector Graphics File
	xul				XML User Interface Language File
	axl
	rdf				Resource Description Framework File
	xaml			WPF Extensible Application Markup Language
	resx			ResX Schema
	plist			Property List
	pom				Maven POM
	mm				FreeMind Mind Map
	xrc				wxWidgets XML Resource
	fbp				wxFormBuilder Project
	wxml			WeChat Mini Program

	web.config		ASP.NET Web Configuration


ABAQUS
	inp

ActionScript
	as

ANSI Art
	nfo				System Information File
	diz				Description in Zip File

ANSYS APDL
	cdb

Assembler Source
	asm
	s
	sx
	inc
	cod				Visual C++ assembler output machine code
	a51				Keil A51

Asymptote Code
	asy

AutoHotkey Script
	ahk

	ia
	scriptlet

AutoIt3 Script
	au3

AviSynth Script
	avs
	avsi

Awk Script
	awk


Batch File
	bat
	cmd

blockdiag
	diag


CIL Assembly
	il

CMake Script
	cmake
	ctest

	CMakeLists.txt
	CMakeCache.txt
	*.cmake.in
	*.ctest.in

CoffeeScript
	coffee
	cjsx			CoffeeScript with JSX
	cson			https://github.com/bevry/cson

	Cakefile

Config File
	conf
	cfg
	cnf
	htaccess		Apache httpd
	properties
	prefs
	iface			Scintilla
	prop
	po				gettext po
	te				SELinux Policy

	my*.ini			MySQL Configuration
	my*.cnf			MySQL Configuration
	Kconfig			Linux Kernel Build Configuration
	Doxyfile		Doxygen Configuration
	.*				dot-file

CSV File
	csv


D Source
	d
	di				D Interface File
	dd				Ddoc Source File

Dart Source
	dart

Diff File
	diff
	patch


Fortran Source
	f
	for
	ftn
	fpp
	f90
	f95
	f03
	f08
	f2k
	hf

F# Source
	fs
	fsi				F# Signature File
	fsx				F# Script File
	fsscript		F# Script
	fsl
	fsy


GN Build Script
	gn
	gni

Go Source
	go
	gop				Go+, https://github.com/goplus/gop
	ql				Q Language, https://github.com/c4pt0r/qlang

Gradle Build Script
	gradle

GraphViz Dot
	dot
	gv

Groovy Script
	groovy
	gvy
	gy
	gsh				Groovy Shell
	gpp				Groovy Parallel Pattern
	grunit			GrUnit


Haskell Source
	hs
	lhs				Literate Haskell

Haxe Script
	hx


Ini Config File
	ini
	inf
	reg
	oem
	sif
	url
	sed
	theme
	clw
	abnf			ABNF, https://www.ietf.org/rfc/rfc5234.txt

	[x] LLVMBuild.txt

Inno Setup Script
	iss
	isl
	islu


Jamfile
	jam

	Jamroot
	Jamfile

Julia Script
	jl


Kotlin
	kt
	kts				Kotlin Script

LaTeX File
	tex
	latex
	sty
	cls				LaTeX Document Class File
	tpx
	bbl
	bib
	ltx
	dtx
	ins
	toc
	info
	rd				R documentation

Lisp Script
	lisp
	el				Emacs Lisp
	lsp
	clj				Common Lisp, ClojureScript
	cljs			Common Lisp
	scm				Scheme

LLVM IR
	ll

Lua Script
	lua
	wlua
	nse				https://nmap.org
	luadoc
	luax


Makefile
	mak
	make
	mk
	dsp				VC6
	dsw				VC6
	am				automake / autoconf
	pro				Qt Creator / qmake
	pri				Qt Creator / qmake
	gmk				GNU make
	ninja			Ninja

	Makefile*
	Kbuild*			Linux Kernel Build

Markdown
	md
	markdown
	mdown
	mkdn
	mkd

	litcoffee		Literate CoffeeScript
	Rmd				R Markdown, https://rmarkdown.rstudio.com/

Mathematica
	m				Module
	nb				Notebook
	wl				WolframScript
	wls				WolframScript

MATLAB Code
	m				MATLAB / Octave
	sce				Scilab
	sci				Scilab


Nim Script
	nim
	nimble
	nims
	nimrod

Nsis Setup Script
	nsi				NSIS Script
	nsh				NSIS Header File
	nlf				NSIS Language File


OCaml Source
	ml
	mli
	mll
	mly
	sml				Standard ML


Pascal Source
	pas
	inc
	dpr
	dpk
	dfm
	pp
	lfm
	lpr
	fpd

Perl Script
	pl
	pm				Perl Module
	cgi
	pod				Perl POD File
	plx				Perl Executable File
	stp

PowerShell Script
	ps1
	psc1			PowerShell Console File
	psd1			PowerShell Data File
	psm1			PowerShell Script Module File


R Code
	R
	rsource

	.Rprofile
	.Rhistory
	Rprofile.site
	Renviron.site

Rebol Script
	r
	reb

	red			Red
	reds		Red/System

Resource Script
	rc
	rc2
	rct
	rh
	dlg

Rust Source
	rs


Scala Script
	scala
	sbt				Scala Build Tool

Shell Script
	sh
	csh				C Shell
	zsh				Z Shell
	bash
	tcsh			C Shell

	m4				M4 Macro
	in				automake / autoconf
	ac				Autoconf

	.bash*
	.profile
	mozconfig		Firefox Build Configuration

	APKBUILD		Alpine Linux packaging script
	PKGBUILD		Arch Linux packaging script

Swift Source
	swift


Tcl Script
	tcl
	itcl			iWidgets Script
	tm				Tcl Module

Texinfo File
	texi
	texinfo
	txi

TOML File
	toml			https://github.com/toml-lang/toml

	Cargo.lock		Rust Cargo
	.pylintrc		Pylint Configuration File

TypeScript
	ts
	tsx		TypeScript with JSX
	cts		cjs
	mts		mjs
	ets		HarmonyOS ArkTS, https://developer.huawei.com/consumer/cn/arkts/


VBScript
	vbs
	dsm				Visual Studio Macro

Verilog HDL Source
	v
	vh
	sv				SystemVerilog
	svh				SystemVerilog Header File

VHDL Source
	vhd
	vhdl

Vim Script
	vim

Visual Basic
	vb
	bas				BASIC Source Code File
	frm				Visual Basic Text Form
	cls				Program Class File
	ctl				Visual Basic User Control Object File
	pag				Visual Basic Property Page
	dsr				Visual Basic Active Designer File
	dob				Visual Basic User Document


WebAssembly
	wat
	wast

WinHex Script
	whs
	tpl				Template Definition

YAML Document
	yml
	yaml
	clang-format	clang-format Configuration File
	clang-tidy		clang-tidy Configuration File
	clangd			clangd Configuration File
	mir				LLVM Machine IR, https://llvm.org/docs/MIRLangRef.html
	apinotes		Swift API Notes
	ifs				LLVM IFS (Interface Stubs)
	gyp				GYP
	gypi			GYP

Zig Source
	zig

https://en.wikipedia.org/wiki/List_of_filename_extensions
https://fileinfo.com/
https://www.file-extensions.org/