List of common file extensions

Video files

264	H.264/MPEG-4 AVC video data file
3g2	3GPP2 multimedia data
3gp	Multimedia files for wireless networks
arf	WebEx advanced record file
asf	Advanced Systems (streaming) format
asx	Microsoft Advanced Streaming Redirector
avi	Audio Video Interleave movie
bik	BINK video
dash	Dynamic Adaptive Streaming over HTTP video
dat	Video CD MPEG movie MPEG1
dvr	Microsoft Windows XP Media Center TV recording
flv	Flash video
h264	H.264 video
m2t	MPEG-2 transport stream
m2ts	MPEG-2 stream (Blu-Ray)
m4v	MPEG-4 video file format
mkv	Matroska multimedia container video file
mod	Hard disk camera movie MPEG-2 program stream
mov	Apple QuickTime digital video
mp4	MPEG-4 video file format
mpeg	MPEG movie
mpg	MPEG 1 video file format
mts	AVCHD MPEG-2 transport stream
ogv	Ogg Vorbis video
prproj	Adobe Premiere Pro project
rec	Recorded data
rmvb	RealMedia variable bitrate
swf	ShockWave Flash, Animated vector format for the Internet
tod	Hard disk camera movie MPEG-2 transport stream
tp	MPEG-2 TV recorded video
ts	MPEG-TV recorded video format
vob	DVD video object
webm	Matroska WebM video
wlmp	Microsoft Windows Live Movie Maker video project
wmv	Windows Media Video

Audio files

3ga	Audio file for wireless networks
aac	Advanced audio coding stream file
aiff	Audio Interchange File Format
amr	Adaptive Multi-Rate compressed audio
ape	Monkey's Audio lossless audio compression format
arf	WebEx advanced record file
asf	Advanced Systems (streaming) format
asx	Microsoft Advanced Streaming Redirector
cda	CD Audio track
dvf	Sony DV voice data
flac	Audio files encoded by Flac - free lossless audio codec
gp4	Guitar Pro 4 project
gp5	Guitar Pro 5 project
gpx	Guitar Pro 6 format
logic	Apple Logic Pro music project
m4a	MPEG-4 compressed audio
m4b	MPEG-4 Audio Layer audio book
m4p	Apple iTunes Music Store audio
midi	MIDI-sequention sound
mp3	Compressed audio and music file, mp3 songs or ringtones
ogg	Ogg Vorbis audio
opus	Opus audio data
pcm	PCM audio data file
rec	Recorded data
snd	Sound data
sng	Audio or song
uax	Unreal audio package
wav	WAVe PCM Sound, standard Windows sound format
wma	Windows Media Audio file
wpl	Microsoft Windows Media Player playlist
zab	Zipped audio book

Bitmap images

bmp	Standard Windows bitmap image
cpt	Corel PHOTO-PAINT bitmap image
dds	DirectDraw surface data
dib	Device-Independent bitmap graphics
dng	Adobe Digital Negative
emf	Enhanced Windows Metafile picture
gif	Graphics interchange file format
heic	High Efficiency Image Format
ico	Icon image
icon	Icon image file
jpeg	JPEG bitmap image format
jpg	JPEG bitmap image
pcx	Paintbrush bitmap image
pic	Picture image
png	Portable Network Graphic file
psd	Adobe Photoshop graphics
psdx	Adobe Photoshop Touch graphics
raw	Digital camera photo RAW image format
tga	Truevision TarGA bitmap image
thm	Thumbnail bitmap image
tif	Aldus Tagged Image File Format (TIFF) bitmap image
tiff	Aldus Tagged Image File Format (TIFF) bitmap image
wbmp	Wireless Bitmap image
wdp	Windows Media HD Photo picture image
webp	Google image file format

Digital camera RAW photos

arw	Sony Digital Camera RAW digital image
cr2	Canon digital camera RAW image format version 2.0
crw	Canon digital camera RAW image format
dcr	Kodak Digital Camera Raw Image Format
dng	Adobe Digital Negative
fpx	Kodak FlashPiX bitmap image
mrw	Minolta Dimage RAW image
nef	Nikon Digital SLR camera RAW image
orf	Olympus Digital camera raw image
pcd	Kodak Picture CD multiresolution image
ptx	Pentax RAW bitmap graphic file
raf	Fuji CCD-RAW graphic image
raw	Digital camera photo RAW image format
rw2	Panasonic Lumix RAW image

Vector graphics

ai	Adobe Illustrator graphics
cdr	CorelDRAW vector or bitmap graphics
csh	Adobe Photoshop custom shape
csl	CorelDRAW symbol library
drw	Vector drawing
emz	Microsoft Windows compressed enhanced metafile
odg	OpenDocument drawing
pic	Picture image
sda	Apache OpenOffice (OpenOffice.org) drawing
svg	XML based scalable vector graphics format
svgz	Compressed SVG (Scalable Vector Graphics)
swf	ShockWave Flash, Animated vector format for the Internet
wmf	Windows Metafile Format

Graphics file types

abr	Adobe Photoshop brush
aep	Adobe After Effects project
ai	Adobe Illustrator graphics
ani	Animated cursor
cdt	CorelDRAW template
djvu	DjVu image
eps	Encapsulated PostScript image
fla	Editable Adobe Flash project (animation, movie, flash application)
icns	Apple icon graphic format
ico	Icon image
icon	Icon image file
mdi	Microsoft Office Document Imaging file format
odg	OpenDocument drawing
pic	Picture image
psb	Adobe Photoshop Large Document Format
psd	Adobe Photoshop graphics
pzl	Puzzle picture image
sup	3D Subtitle format
vsdx	Microsoft Visio drawing
xmp	Adobe Extensible Metadata Platform data

3D graphics

3d	3D drawing CAD data
3ds	3ds Max (3D Studio MAX) graphics
c4d	CINEMA 4D file format
dgn	MicroStation drawing
dwfx	Autodesk Design Web Format
dwg	AutoCAD drawing
dxf	AutoCAD DXF Drawing Exchange Format
ipt	AutoDesk Inventor CAD part
lcf	ArchiCAD library container
max	3ds Max (3D Studio MAX) scene
obj	3D object graphics
pro	General project file
skp	SketchUp graphics
stl	Stereolithography CAD data
u3d	Universal 3D format graphics
x_t	Parasolid model (text)

Font files

eot	Embedded OpenType font
otf	OpenType font file format
ttc	TrueType Font collection
ttf	TrueType font
woff	Web Open Font Format package

Documents

abw	AbiWord document
aww	Ability Write document
chm	Microsoft compiled HTML help module
cnt	Help Contents data
dbx	Microsoft Outlook Express e-mail folder
djvu	DjVu image
doc	Microsoft Word document (prior version 2007)
docm	Microsoft Word Open XML macro-enabled document
docx	Microsoft Word Open XML document
dot	Microsoft Word document template (up to Microsoft Word 2003 version)
dotm	Microsoft Word Open XML macro-enabled document template
dotx	Microsoft Word XML document template
epub	Open Publication structure e-book
gp4	Guitar Pro 4 project
ind	Adobe InDesign graphics document
indd	Adobe InDesign document
key	iWork Keynote '09 presentation
keynote	iWork Keynote '06 presentation
mht	Mime HTML (MHTML) document
mpp	Microsoft Project plan file
odf	Open Document Interchange Format (ODIF)
ods	OpenDocument spreadsheet
odt	ODF text document
opx	Microsoft Office Organization chart file format
ott	OpenOffice.org text document template
oxps	Microsoft OpenXPS document
pages	Pages document
pdf	Adobe Portable document format
pmd	Adobe PageMaker document
pot	Microsoft PowerPoint 97 to 2003 template
potx	Microsoft PowerPoint Open XML presentation template
pps	Microsoft PowerPoint 97 to 2003 complete slide show
ppsx	Microsoft PowerPoint Open XML complete slide show
ppt	Microsoft PowerPoint 97 to 2003 presentation
pptm	Microsoft PowerPoint macro-enabled Open XML presentation
pptx	Microsoft PowerPoint Open XML presentation
prn	HP PCL printer output
prproj	Adobe Premiere Pro project
ps	Adobe PostScript document
pub	Microsoft Publisher document
pwi	Microsoft Office Mobile personal note
rtf	Rich Text Format document
sdd	OpenOffice.org presentation
sdw	OpenOffice.org text document
shs	Microsoft Windows Shell Scrap Object
snp	Microsoft Access report shapshot
sxw	OpenOffice.org Writer document
tpl	Template file
vsd	Microsoft Visio diagram document
wpd	Corel WordPerfect document
wps	Microsoft Works document
wri	Windows Write document
xps	Microsoft XPS document

Simple text files

1st	Readme first text document
alx	BlackBerry application loader
application	ClickOnce deployment manifest
asp	Active Server Page script page
csv	Comma Separated Value file
htm	HTML Hypertext Markup Language web page
html	HyperText Markup Language web page
log	Log
lrc	Lyrics data
lst	List text
md	Markdown markup language source code
nfo	Information readme text document
opml	OPML Outline Processor Markup Language file format
plist	Apple property XML list
reg	Windows registry data
rtf	Rich Text Format document
srt	SubRip video subtitle format
sub	Video subtitles
tbl	Table data
text	Simple text file
txt	Simple plain text
xml	XML document
xmp	Adobe Extensible Metadata Platform data
xsd	XML schema description
xsl	XML eXtensible stylesheet
xslt	XSL transform data

E-book files

azw	Amazon Kindle eBook format
azw3	Amazon Kindle eBook
azw4	Amazon Kindle Print Replica e-book
cbr	Comic Book Archive file or ComicBook Reader e-book
cbz	Comic Book Archive file or ComicBook Reader e-book
epub	Open Publication structure e-book
fb2	FictionBook e-Book
iba	iBooks Author e-book
ibooks	iBooks e-book
lit	Microsoft Reader eBook
mobi	Mobipocket eBook format
pdf	Adobe Portable document format

Spreadsheets

numbers	Apple Numbers spreadsheet
ods	OpenDocument spreadsheet
sdc	OpenOffice.org spreadsheet
sxc	Apache OpenOffice 1.0 spreadsheet
xls	Microsoft Excel 97 to 2003 workbook
xlsm	Microsoft Excel Open XML macro-enabled workbook
xlsx	Microsoft Excel Open XML workbook and spreadsheet

Microsoft Office files

accdb	Microsoft Access main database
accdt	Microsoft Access database template
doc	Microsoft Word document (prior version 2007)
docm	Microsoft Word Open XML macro-enabled document
docx	Microsoft Word Open XML document
dot	Microsoft Word document template (up to Microsoft Word 2003 version)
dotm	Microsoft Word Open XML macro-enabled document template
dotx	Microsoft Word XML document template
mdb	Microsoft Access database
mpd	Microsoft Project database
mpp	Microsoft Project plan file
mpt	Microsoft Project template
oft	Microsoft Outlook template
one	Microsoft OneNote document
onepkg	Microsoft OneNote package
pot	Microsoft PowerPoint 97 to 2003 template
potx	Microsoft PowerPoint Open XML presentation template
pps	Microsoft PowerPoint 97 to 2003 complete slide show
ppsx	Microsoft PowerPoint Open XML complete slide show
ppt	Microsoft PowerPoint 97 to 2003 presentation
pptm	Microsoft PowerPoint macro-enabled Open XML presentation
pptx	Microsoft PowerPoint Open XML presentation
pst	Microsoft Outlook personal storage table
pub	Microsoft Publisher document
snp	Microsoft Access report shapshot
thmx	Microsoft Office theme
vsd	Microsoft Visio diagram document
vsdx	Microsoft Visio drawing
xls	Microsoft Excel 97 to 2003 workbook
xlsm	Microsoft Excel Open XML macro-enabled workbook
xlsx	Microsoft Excel Open XML workbook and spreadsheet

Game related files

big	Electronic Arts game resource package
bik	BINK video
cab	Windows Cabinet Compressed Archive
dat	Game data
dds	DirectDraw surface data
hi	High score record
lng	Language definition file
pak	Game resource package
replay	Rocket League game replay
replay	Fortnite game replay
res	Game resource data
rofl	League of Legends game replay file
sav	Saved game file
save	Doom 3 saved game
sc2replay	Starcraft 2 game replay
scn	Game scenario file
scx	Game scenario
uax	Unreal audio package
wotreplay	World of Tanks battle replay
wowpreplay	World of Warplanes replay
wrpl	War Thunder replay

Emulation related files

Virtualization software related files

ova	Open Virtual Machine Format single archive
ovf	Open Virtualization Format package file
pvm	Parallels Desktop virtual machine
vdi	VirtualBox disk image
vhd	Virtual Hard Disk file
vhdx	Microsoft Windows Hyper-V virtual hard disk
vmdk	VMware virtual disk
vmem	VMware virtual machine's paging data
vmwarevm	VMware virtual machine package
vmx	VMware configuration data file

Internet related files

ashx	ASP.NET web handler file
asp	Active Server Page script page
aspx	Active Server Page Extended ASP.NET script
atom	Atom web feed
bc	BitTorrent unfinished download
bc!	Bittorrent unfinished download
class	Java bytecode class
crdownload	Google Chrome incomplete download
css	Cascading Style Sheets
dlc	JDownloader download link container
download	Mozilla partial download
download	Apple Safari partial download
eml	Email message
flv	Flash video
gdoc	Link to Google Docs web application document
gif	Graphics interchange file format
gsheet	Link to Google Sheets web application spreadsheet document
gslides	Link to Google Slides web application presentation
htm	HTML Hypertext Markup Language web page
html	HyperText Markup Language web page
js	JavaScript source code script
json	JavaScript object notation data interchange format
jsp	JAVA Server page file
jws	Oracle WebLogic Server Java Web Services data
mht	Mime HTML (MHTML) document
opml	OPML Outline Processor Markup Language file format
part	Partial download
partial	Microsoft partially downloaded data
php	PHP script or page
png	Portable Network Graphic file
rss	Really Simple Syndication - RSS file format
swf	ShockWave Flash, Animated vector format for the Internet
torrent	BitTorrent information
webm	Matroska WebM video
webp	Google image file format
xap	Microsoft Windows Phone and Microsoft Silverlight application package
xhtml	Extensible HTML document
xml	XML document
xsd	XML schema description
xsl	XML eXtensible stylesheet
xslt	XSL transform data

Email files

dbx	Microsoft Outlook Express e-mail folder
eml	Email message
ldif	LDIF address book interchange format
mht	Mime HTML (MHTML) document
msg	Saved email message file
pst	Microsoft Outlook personal storage table
vcf	vCard contacts

File extensions blocked by mail clients

app	Mac application package or core system service
asp	Active Server Page script page
bat	Batch file (executable)
chm	Microsoft compiled HTML help module
cnt	Help Contents data
com	Command executable
eml	Email message
exe	Program executable
gadget	Windows sidebar gadget
inf	Windows installation script
js	JavaScript source code script
lnk	Windows Shortcut
mdb	Microsoft Access database
msi	Microsoft Windows Installer installation package
prg	Program
reg	Windows registry data
scr	MS Windows screensaver
shs	Microsoft Windows Shell Scrap Object
tmp	Temporary data
vbs	Visual Basic script

Possibly dangerous files

bat	Batch file (executable)
bin	Binary executable
chm	Microsoft compiled HTML help module
class	Java bytecode class
com	Command executable
dll	Dynamic Link Library
drv	Microsoft Windows device driver
exe	Program executable
jar	Compressed archive file package for Java classes and data
js	JavaScript source code script
lnk	Windows Shortcut
ocx	ActiveX Control
pcx	Paintbrush bitmap image
scr	MS Windows screensaver
shs	Microsoft Windows Shell Scrap Object
swf	ShockWave Flash, Animated vector format for the Internet
sys	System file
vbs	Visual Basic script
vxd	Microsoft Windows virtual device driver
wmf	Windows Metafile Format

Ransomware encrypted files

Archives

001	Compressed file from a multi-volume archive (part 1)
002	Compressed file from a multi-volume archive (part 2)
003	Compressed file from a multi-volume archive (part 3)
004	Compressed file from a multi-volume archive (part 4)
005	Compressed file from a multi-volume archive (part 5)
006	Compressed file from a multi-volume archive (part 6)
007	Compressed file from a multi-volume archive (part 7)
008	Compressed file from a multi-volume archive (part 8)
009	Compressed file from a multi-volume archive (part 9)
010	Compressed file from a multi-volume archive (part 10)
7z	7-ZIP compressed 7z archive
7z.001	Split Multi-volume 7-ZIP compressed file archive (part 1)
7z.002	Split Multi-volume 7-ZIP compressed file archive (part 2)
7z.003	Split Multi-volume 7-ZIP compressed file archive (part 3)
7z.004	Split Multi-volume 7-ZIP compressed file archive (part 4)
7zip	7-Zip 7z compressed archive
a00	Split Multi-volume ARJ compressed file archive (part 2)
a01	Split Multi-volume ARJ compressed file archive (part 3)
a02	Split Multi-volume ARJ compressed file archive (part 4)
a03	Split Multi-volume ARJ compressed file archive (part 5)
a04	Split Multi-volume ARJ compressed file archive (part 6)
a05	Split Multi-volume ARJ compressed file archive (part 7)
ace	WinACE compressed ace archive
air	Adobe AIR rich Internet applications
appxbundle	Microsoft Windows app bundle package
arc	ARC lossless data compression and archive format
arj	ARJ Compressed archive
asec	Google Android encrypted application package
bar	BlackBerry OS 10 application installation package
bin	Macbinary II encoded file
c00	Split Multi-volume ACE compressed file archive
c01	Split Multi-volume ACE compressed file archive
c02	Split Multi-volume ACE compressed file archive
c03	Split Multi-volume ACE compressed file archive
cab	Windows Cabinet Compressed Archive
cbr	Comic Book Archive file or ComicBook Reader e-book
cbz	Comic Book Archive file or ComicBook Reader e-book
cso	CISO compressed ISO image
deb	Debian Linux package
dlc	JDownloader download link container
gz	GZIP compressed archive
gzip	GNU ZIP gzip compressed archive
hqx	Macintosh BinHex archive
inv	Microsoft Windows Update data
ipa	Apple iOS application
isz	UltraISO compressed disk image
jar	Compressed archive file package for Java classes and data
msix	UWP app package
msu	Microsoft Update Standalone Package
nbh	HTC ROM update utility ROM image
pak	Game resource package
part1.exe	Split Multi-volume RAR compressed self-extracting file archive (part 1)
part1.rar	Split Multi-volume RAR compressed file archive (part 1)
part2.rar	Split Multi-volume RAR compressed file archive (part 2)
pkg	Apple macOS (OS X) installer package
pkg	Archive or installation package
r00	Split Multi-volume RAR compressed file archive (part 2)
r01	Split Multi-volume RAR compressed file archive (part 3)
r02	Split Multi-volume RAR compressed file archive (part 4)
r03	Split Multi-volume RAR compressed file archive (part 5)
r04	Split Multi-volume RAR compressed file archive (part 6)
r05	Split Multi-volume RAR compressed file archive (part 7)
r06	Split Multi-volume RAR compressed file archive (part 8)
r07	Split Multi-volume RAR compressed file archive (part 9)
r08	Split Multi-volume RAR compressed file archive (part 10)
r09	Split Multi-volume RAR compressed file archive (part 11)
r10	Split Multi-volume RAR compressed file archive (part 12)
rar	WinRAR RAR compressed archive
rpm	Linux package manager archive
sis	Symbian installation file
sisx	Symbian OS program installation executable
sit	StuffIt archive format
sitd	StuffIt archive
sitx	StuffIt archive
tar	Unix standard Archive format, Tape Archive
tar.gz	Old version Gzip compressed TAR Archive
tgz	Gzip compressed TAR archive
uax	Unreal audio package
vsix	Microsoft Visual Studio extension package
webarchive	Apple Safari web archive
xap	Microsoft Windows Phone and Microsoft Silverlight application package
z01	Split Multi-volume ZIP compressed file archive (part 2)
z02	Split Multi-volume ZIP compressed file archive (part 3)
z03	Split Multi-volume ZIP compressed file archive (part 4)
z04	Split Multi-volume ZIP compressed file archive (part 5)
z05	Split Multi-volume ZIP compressed file archive (part 6)
zab	Zipped audio book
zip	Compressed ZIP archive
zipx	Extended Zip archive

Backup files

bak	Generally a backup created by various software applications
bbb	BlackBerry backup (post 2012)
bkf	Microsoft backup
bkp	Backup
dbk	Sony Ericsson mobile phone backup
gho	Norton Ghost backup image
ipd	BlackBerry backup (pre 2012)
iso	CD/DVD/HD DVD/Blu-ray disc ISO binary image
json	Mozilla Firefox bookmark backup
mdbackup	Apple iPhone backup
nba	Nero BackItUp archive
nbf	Backup NOW! backup archive
nco	Nero BackItUp compressed backup
nrg	Nero-Burning ROM CD or DVD image
old	Backup archive
rar	WinRAR RAR compressed archive
sbf	Google Android mobile phone backup file
sbu	Samsung Kies backup
spb	Samsung Kies exported phone contacts library
spba	Samsung Kies phone contacts library
tib	Acronis True Image disk image backup
wbcat	Microsoft Windows backup information
zip	Compressed ZIP archive

Disk images

000	IsoBuster recovered CD/DVD image
bin	CD/DVD binary image
ccd	CloneCD disk image
cue	Cue sheet description
daa	PowerISO Direct-Access-Archive
dao	Disk at Once CD/DVD image
dmg	Apple Mac disk image
img	CloneCD disk image
img	Floppy Image image
iso	CD/DVD/HD DVD/Blu-ray disc ISO binary image
isz	UltraISO compressed disk image
mdf	Alcohol 120% disc image file format
mds	Alcohol 120% Image file (media descriptor file) format
mdx	Media Data eXtended image
nrg	Nero-Burning ROM CD or DVD image
tao	TAO Track at Once CD/DVD image
tc	TrueCrypt disk volume image file
toast	Roxio Toast disk image
uif	MagicISO Universal Image Format
vcd	Virtual CD-ROM CD image

Mobile phone related files

apk	Google Android application package
asec	Google Android encrypted application package
bbb	BlackBerry backup (post 2012)
crypt	WhatsApp encrypted backup (original)
crypt14	WhatsApp Messenger message database version 2021
crypt15	WhatsApp Messenger encrypted chat history database backup version 2022
ipa	Apple iOS application
ipd	BlackBerry backup (pre 2012)
ipsw	iPhone, iPad or iPod Touch iOS software firmware update
lqm	LG QuickMemo note
mdbackup	Apple iPhone backup
nbh	HTC ROM update utility ROM image
nomedia	Google Android OS system data
npf	Samsung PC Studio phone book backup
pkpass	Apple Wallet pass data
rem	BlackBerry encrypted data
rsc	Resource data
sbf	Google Android mobile phone backup file
sis	Symbian installation file
sisx	Symbian OS program installation executable
spd	S Note note (new version)
thm	Sony Ericsson mobile phone theme
tpk	Tizen application package
vcf	vCard contacts
xap	Microsoft Windows Phone and Microsoft Silverlight application package
xapk	Google Android XAPK application package

Mobile ringtones

aac	Advanced audio coding stream file
aiff	Audio Interchange File Format
amr	Adaptive Multi-Rate compressed audio
djr	Ringtone Media Studio ringtone
m4a	MPEG-4 compressed audio
midi	MIDI-sequention sound
mp3	Compressed audio and music file, mp3 songs or ringtones
wav	WAVe PCM Sound, standard Windows sound format
wma	Windows Media Audio file

Financial files

gdb	Database file
ofx	Open Financial Exchange format
qif	Quicken Interchange Format

Database related files

accdb	Microsoft Access main database
accdt	Microsoft Access database template
csv	Comma Separated Value file
db	Database file
dbf	Common database
fdb	Firebird database
gdb	Database file
idx	Index file
mdb	Microsoft Access database
mdf	Microsoft SQL Server master database file format
sdf	SQL Server compact edition database
sql	Structured Query Language Data SQL data
sqlite	SQLite database
wdb	Microsoft Works database
xml	XML document

GIS, GPS, map file types

adf	ArcView ARC/INFO coverage data
geo	eXplorist GPS Geocache Manager database
gpx	GPS eXchange format
kml	Google Earth Keyhole Markup language data
kmz	Compressed Keyhole Markup Language (Google Earth) data
map	Geographical map

Program executables

air	Adobe AIR rich Internet applications
app	Mac application package or core system service
application	ClickOnce deployment manifest
appx	Microsoft AppX application package
bat	Batch file (executable)
bin	Binary executable
com	Command executable
cpl	Microsoft Windows Control Panel data
deb	Debian Linux package
dll	Dynamic Link Library
elf	ELF executable
exe	Program executable
jar	Compressed archive file package for Java classes and data
js	JavaScript source code script
lnk	Windows Shortcut
msi	Microsoft Windows Installer installation package
part1.exe	Split Multi-volume RAR compressed self-extracting file archive (part 1)
prg	Program
rpm	Linux package manager archive
shs	Microsoft Windows Shell Scrap Object
vbs	Visual Basic script
xap	Microsoft Windows Phone and Microsoft Silverlight application package

System file types

alx	BlackBerry application loader
blf	Microsoft Windows registry data file
cpl	Microsoft Windows Control Panel data
dat	Program data
dll	Dynamic Link Library
drv	Microsoft Windows device driver
ds_store	macOS folder information
dump	Dump data
evtx	Microsoft Windows event log
gadget	Windows sidebar gadget
idx	Index file
inf	Windows installation script
kext	Apple Mac kernel extension
key	Microsoft Windows 7 registry key file
mui	MultiLanguage Windows resource data
ocx	ActiveX Control
reg	Windows registry data
rom	Read Only Memory image
scr	MS Windows screensaver
sfcache	ReadyBoost cache
swp	Swap file
sys	System file
vxd	Microsoft Windows virtual device driver

Various presets or theme files

aae	Apple Photos sidecar file
alx	BlackBerry application loader
ccd	CloneCD disk image
cnf	Network configuration data
contact	Microsoft Windows contact data
cue	Cue sheet description
deskthemepack	Microsoft Windows theme pack
eng	English language localization
ics	iCalendar calendar file format (Microsoft Outlook, Apple iCal)
ifo	DVD movie information file format
lnk	Windows Shortcut
lrtemplate	Adobe Photoshop Lightroom preset settings
m3u	MP3 songs playlist
m3u8	UTF-8 M3U playlist
mui	MultiLanguage Windows resource data
plist	Apple property XML list
pls	Media playlist
pro	Profile file
ref	Reference
skn	Skin
svp	Virtual DJ visualization effects
theme	Windows desktop theme
themepack	Microsoft Windows 7 theme pack
thm	Sony Ericsson mobile phone theme
thmx	Microsoft Office theme
trm	Terminal settings
usr	User specific settings
wba	WindowBlinds Desktop visual style

Plugins

crx	Google Chrome extension installer file format
plugin	Plugin
safariextz	Apple Safari extension
vsix	Microsoft Visual Studio extension package
xpi	Firefox browser extension

Source code files

asm	Assembler source code
asp	Active Server Page script page
aspx	Active Server Page Extended ASP.NET script
bat	Batch file (executable)
htm	HTML Hypertext Markup Language web page
inc	Include data
jad	Java application descriptor file
java	Java language source code
js	JavaScript source code script
json	JavaScript object notation data interchange format
jsp	JAVA Server page file
lib	Microsoft Linker input library data
o	Object format
php	PHP script or page
rc	Microsoft Visual Studio Visual C/C++ resource script
rss	Really Simple Syndication - RSS file format
scpt	AppleScript script
src	Generally source code
vbs	Visual Basic script
xcodeproj	Apple Xcode software development project
xml	XML document
xsd	XML schema description
xsl	XML eXtensible stylesheet
xslt	XSL transform data

Configuration files

cfg	Configuration files
cnf	Network configuration data
config	Configuration data
ini	Text configuration data
pro	Profile file
reg	Windows registry data

Binary files

dmp	Memory dump, screen dump, junk files
log	Log

Encrypted files

asec	Google Android encrypted application package
crypt	WhatsApp encrypted backup (original)
key	Licence or encrypted security key
ksd	KeepSafe encrypted data
pfx	Certificate
pkpass	Apple Wallet pass data
rem	BlackBerry encrypted data
tc	TrueCrypt disk volume image file

Temporary files

!ut	uTorrent incomplete download
adadownload	Adobe Download Assistant partially completed download
bc	BitTorrent unfinished download
bc!	Bittorrent unfinished download
blf	Microsoft Windows registry data file
cache	Generally cache
crdownload	Google Chrome incomplete download
dmp	Memory dump, screen dump, junk files
download	Apple Safari partial download
download	Chrome partial download
download	Mozilla partial download
part	Partial download
partial	Microsoft partially downloaded data
temp	Temporary file
tmp	Temporary data

Various file types

2023	Various files saved in 2023
3dr	3DMark benchmark result
cal	Calendar data
dat	Program data
dct	Spell checking dictionary data
dic	Dictionary
dmp	Memory dump, screen dump, junk files
lng	Language definition file
log	Log
md5	Checksum data
msmessagestore	Windows Mail message information database
mswmm	Microsoft Windows Movie Maker project
npo	Nonpareil redundancy summary data
prj	Project
rep	Report file
rsc	Resource data
srg	Microsoft PowerPoint self-registration data
tbl	Table data
template	Template
upd	Update data
upg	Firmware upgrade