Extensões. Como abrir um arquivo

Como abrir este ou aquele arquivo? Esta questão surge quando encontramos uma extensão de arquivo desconhecida. Abaixo listarei muitos desses formatos e indicarei com qual programa abri-los, bem como o que são. Mas primeiro, vou criar um pequeno lembrete.

Extensão de arquivo desconhecida
Se você não sabe qual extensão seu arquivo possui, faça o seguinte. Vá ao Painel de Controle e encontre Opções de Pasta. Nele, vá até a aba Visualizar e localize o item Ocultar extensões de arquivos registrados. Desmarque este item e agora o formato do arquivo será indicado ao final de cada arquivo. É indicado após o ponto. Exemplo: arquivo.txt. Aqui está o formato - txt.

Como encontrar rapidamente o formato nesta página
Para evitar rolar muito e procurar um formato, basta clicar CTRL + F e insira o ramal desejado.

Se você não encontrou a extensão que precisa, escreva nos comentários e ela certamente aparecerá. Todos os formatos são organizados em ordem alfabética.

1cd: 1C.
3ds: Autodesk 3ds Max 2011, MeshLab, IMSI TurboCAD Deluxe 18, Google SketchUp.
3ga: Media Player Classic, VLC Media Player, Windows Media Player, Apple QuickTime Player, DVDVideoSoft Free 3GP Converter, Mobile Media Converter, FFmpeg.
3gp, 3gpp: reprodutor de mídia VideoLAN VLC, Apple QuickTime Player, Roxio Easy Media Creator, conversor MIKSOFT Mobile 3GP, RealNetworks RealPlayer, MPlayer.
7z: 7-Zip, WinRAR, PeaZip, StuffIt Deluxe 2009, WinZip 12 Pro, ZipZag, ZipGenius, ConeXware PowerArchiver.
aac: Media Player Clássico, Windows Media Player, Winamp, AIMP.
abr: Adobe Photoshop, visualizador ABR, ABRView
ac3: Nullsoft Winamp Media Player 5.6, Nero Multimedia Suite 10, Microsoft Windows Media Player, CyberLink PowerDVD 10 Mark II
ADF: ADF Opus, WinUAE, WinFellow, Cloanto Amiga Forever
ai: Adobe Illustrator, Adobe Acrobat, Adobe Photoshop, IMSI TurboCAD, ACD Systems Canvas
ar: Adobe AIR, Adobe Flash
amr: Conversor AMR para MP3, Ferramenta AMR, Conversor AMR Móvel
macaco:Winamp
app: um arquivo executável para executar aplicativos em Mac/iOS. No sistema operacional Windows, seu análogo é a extensão *.exe.
arco: WinAce, WinZip 12 Pro - Avaliação gratuita, Acubix PicoZip, ConeXware PowerArchiver, Smith Micro Stuffit Deluxe
arf: Reprodutor de gravação em rede
arj: ARJ ou ARJ32 (software ARJ), Zipeg
braço: Ferramenta Windows AMR, Conversor Mobile AMR, RealNetworks RealPlayer, Apple QuickTime Player
arw: Adobe Photoshop, Adobe Photoshop Lightroom, ImageMagick Studio ImageMagick, driver Sony RAW, Sony Image Data Converter SR
asd: Microsoft Office
asec: SDK do Google Android
caralho: Media Player Classic, Zoom Player, VLC Media Player, Windows Media Player, liga leve
ashx: Microsoft Visual Web Developer, bloco de notas
aspx: Microsoft Visual Studio, em qualquer navegador
ast: Adobe Photoshop, Illustrator, Acrobat ou Apple ClarisWorks
att: Weaver Software PostData Spider, Windows Notepad, outro editor de texto
avc: Kaspersky Antivírus, Kaspersky Internet Security
avchd: K-Lite
avi: Media Player Classic, Windows Media Player, Zoom Player, MPlayer, VLC Media Player 
awb: Kodak Imaging para Windows, Smart FaxSee, FaxSee Pro, Polybytes PolyView
bak: Autodesk AutoCAD
bat: arquivo executável, executado pelo sistema operacional
bdmv: VLC Media Player ,CyberLink PowerDVD,Roxio Creator,Corel WinDVD
bdrip: reprodutor de mídia VLC
grande: FinalBig,AssetCache Builder
bik: Windows Media Player com pacote de codecs do Windows 7
bin: UltraISO, Nero, MagicISO 
bkf: Backup e restauração do Windows, Backup do Microsoft Windows NT - Restaurar, reparo SysTools BKF
Blu-ray: Cyberlink PowerDVD 10
bmp: Paint.NET, CorelDRAW Graphics Suite, Adobe Acrobat, Adobe InDesign, Nuance OmniPage
bsa: BSA Commander,BSA Unpaker,FOMM (FallOut Mod Manager),FO3 Archive,Quick Morrowind BSA
Bup: Nero, CyberLink PowerDVD, Corel WinDVD
bwg: Gerador BrainWave
bz2: janelas WinRAR
cabine: BobCAD-CAM,PRO Landscape,AutoSketch,ExtraCAD,LogiKal
cbr: STDU Viewer,Calibre,WinRAR,StuffIt Deluxe
cbz: Windows Comical, CDisplay
ccd: MagicISO, Projetos Inteligentes IsoBuster, SlySoft CloneCD, CD Virtual do Software H+H, Lightning UK! ImgBur
cda: Windows Media Player, Apple iTunes, Nullsoft Winamp, RealNetworks RealPlayer, VLC Media Player 
cdi: IsoBuster,UltraISO,PowerISO,MagicISO
cdp: N3V Games Trainz Driver, N3V Games Trainz Railway, Trainz CDP Batcher, Trainz Pro Routes CDP Browser
cdw: COMPASS, visualizador COMPASS-3D
cfg: Bred 3, Notepad++, editor PSPad, Bloco de notas
cfp: Cfont Pro
chm: FBReader, Calibre, executável de ajuda HTML da Microsoft, xCHM
classe: Eclipse IDE para desenvolvedores Java com plugin JD-Eclipse, Oracle Java Runtime Environment, dirtyJOE, JD-GUI
cpi: Adobe Premiere Pro, Roxio Creator, CyberLink PowerDirector, Pinnacle Studio
cpt: IrfanView, XnView, Corel Photo-Paint
cr2: Adobe Photoshop, ACDSee, XnView
crd: Notepad, Bred 3, editor PSPad, Notepad++ e qualquer outro editor de texto
download: Google Chrome
crw: Software incluído com câmera Canon, Adobe Photoshop, Adobe Photoshop Lightroom, ACDSee Photo Manager, ACD Systems Canvas
crx: Google Chrome
csd: Manga Studio
cso: Compressor ISO PSP, Conversor CiSO, Windows UMDGen
ctg: Não pode ser aberto manualmente
sugestão: Álcool 120%, Nero, IsoBuster, UltraISO, MagicISO
cvs: Tela X
cxarchive: minecraftovich
daa: PowerISO, UltraISO, WinArchiver, DAA2ISO
dat: Bred 3,Notepad++,editor PSPad,Notepad
dados: bloco de notas
Davi: KMPlayer,Reprodutor DVR365,Reprodutor DAV
banco de dados: Bloco de notas, editor PSPad, Notepad++
dbf: dBASE, Visual FoxPro, Microsoft Access, Microsoft Excel, DBFShow
banco de dados: WinZip, WinRAR, ALZip
dbx: Microsoft Outlook Express, MailNavigator, Windows Live Mail, OE-Mail Recovery, Remo Recover Outlook Express
dc1: Stata Labs Bloomba
dcm: Adobe Photoshop, ACD Systems Canvas, IrfanView, XnView, DicomWorks
dctmp:DC++
dds: Adobe Photoshop, IrfanView, Editor de textura Microsoft DirectX, Nvidia DDS Utilities, Otaku DeskSpace
deb: 7-Zip (para lunix Alien)
dtu: deltup (Linux)
criadores: Half-Life: Counter Strike, Hexen 2, VirtualDub
dff: Visualizador DFF, Análise RW, Ferramentas GTA, Ferramentas SA, Modelador Zanoza
dfx: Autodesk AutoCAD, Autodesk Maya, Logipole Konvertor, eDrawings, Softdesk Drafix
dgdat: não pode ser aberto manualmente
dgn: Autodesk AutoCAD, Corel PaintShop, IMSI TurboCAD, Rhinoceros (Rhino), AutoDWG Conversor DGN para DWG
divx: Media Player Classic, Zoom Player, CyberLink PowerDVD, Light Alloy, BSplayer
diz: Bred 3, Notepad, editor PSPad, Notepad++
djproject: After Effects
djvu: Leitor DjVu, Visualizador STDU, Calibre
dll: Hacker de recursos do Windows 
dmf: DeliPlayer, StormSky RainbowPlayer, MODPlug Tracker ou Player, Xtracker32, FMJ-Software Awave Studio
dmg: UltraISO, MagicISO, Sistemas Agudos TransMac
dmp: Microsoft Visual Studio, ferramentas de depuração do Windows, depuração do kernel do Windows, utilitário Microsoft Dumpflop
documento: word, OpenOffice.org
docm: word, OpenOffice.org
docx: word, OpenOffice.org
dotx: palavra, OpenOffice.org
dsnv: Designer de PCB OrCAD
dt: recodificar para 1s
dts: Apple iTunes, CyberLink PowerDVD, VLC Media Player, Media Player Classic, Corel WinDVD
dtshd: DTS-HD Master Audio Suite, DTS Surround Audio Suite
dv4: Bosch Security Systems Archive Player, Windows Media Player com codec Xvid, Media Player Classic com codec Xvid
dvd: k-lite, KMP e outros programas que reproduzem vídeo
dvdrip: Windows Media Player 11
DVR: Windows Media Playe, Media Player Classic, Microsoft Windows Media Center, WinDVD Creator
dwf: Autodesk AutoCAD, Autodesk Inventor, IMSI TurboCAD
dwg: Autodesk AutoCAD, Autodesk Inventor, IMSI TurboCAD
dxf: Autodesk AutoCAD, Autodesk Inventor, IMSI TurboCAD
ecw: Erdas Imagine, ACD Systems Canvas, IrfanView, ArcGIS, TatukGIS Viewer
eml: Mozilla Thunderbird, Microsoft Outlook, Microsoft Outlook Express, Windows Mail, bem como qualquer navegador
emz: Microsoft Office, Microsoft Visio, XnView, Corel PaintShop, Logipole Konvertor
epf: 1C: Empresa, 1C: Contabilidade
EPS: Adobe Illustrator, Adobe Photoshop, CorelDRAW Graphics Suite, Inkscape, ACDSee
epub: Adobe Digital Editions
ert: 1C:Contabilidade
especialmente: Fallout 3, Fallout: New Vegas, Bethesda Softworks GECK
ex4: MetaQuotes MetaTrader, ex4_to_mq4, descompilador ex4_to_mq4
exe: Clique duplo, Resource Tuner, Resource Hacker, eXeScope
f4v: Adobe InDesign, VLC Media Player, Adobe Creative Suite
fb2: FBReader, STDU Viewer, CoolReader, Caliber, TequilaCat Book Reader para telefones com Java
fbd: FBDMaker, MyHomeLib, Fb2Librarian
fdb: Portfólio Extensis
flac: Nullsoft Winamp com plugin FLAC, VLC Media Player, Roxio Creator, Adobe Audition, VUPlayer, Windows Media Player com plugin CoreFLAC
FLV: Adobe Flash Player, Media Player Classic, Adobe Flash, Adobe InDesign, FLV Player
fp3: Visualizador FastReport
frd:MS LiveMeeting 2007
frf: Font Monger, FreeReport
frp: Melhor Zvit
frw: KOMPAS, visualizador KOMPAS-3D (gratuito)
fsb: Designer FMOD da Firelight Technologies, Sandbox FMOD da Firelight Technologies
ftp: Baixar Mestre
gadget: WinZip, Microsoft Windows Vista, Microsoft Windows 7, Microsoft Windows 8
gcf: Valve Steam, GCFSscape
gdb: Embarcadero InterBase, Recoveronix InterbaseRecovery, IBExpert
geração: ESRI ArcView
gho: Symantec Norton Ghost Explorer, Symantec Norton Ghost
gif: ACDSee, ACD Systems Canvas, Paint.NET, XnView, Adobe Photoshop
gp4: Guitar Pro, TuxGuitar, DGuitar
gp5: Guitar Pro, TuxGuitar, DGuitar
gpx: Google Earth, Merkaartor, TopoGrafix EasyGPS, Microsoft Streets & Trips, Garmin MapSource
grp: Conversor de grupo do gerenciador de programas do Windows (arquivo grpconv.exe), SmarterTools SmarterMail
gsf:Vapor
GSM: Awave Studio, Switch NCH, SoX
gz: WinRAR, WinZip, 7-Zip, ALZip, StuffIt Deluxe
h264: Media Player Classic, Windows Media Player, VLC Media Player, BSplayer, Apple QuickTime Player 
hlp: Adobe RoboHelp, Help Explorer Viewer, Microsoft Help Workshop, YpgSoft Windows HLP para RTF
htm: qualquer navegador da web, bem como qualquer editor de texto
html: navegador web, bloco de notas, bem como qualquer editor de texto
ibk: ICE Book Reader Versão Russa Profissional 
ico: IcoFX, Axialis IconWorkshop, ActivIcons
idx: CyberLink PowerDVD, VLC Media Player, URUWorks Subtitle Workshop, DVDSub
ifo: VLC Media Player, Windows Media Player, Roxio Creator, CyberLink PowerDVD, Nero
igs: IMSI TurboCAD, Autodesk AutoCAD com plug-in de importação IGES, Autodesk Inventor, Autodesk 3ds Max, ACD Systems Canvas
imagens: UltraISO, Nero, MagicISO, WinImage
img: UltraISO, Nero, MagicISO, WinImage
indd: Adobe Acrobat, Adobe InDesign, Adobe InCopy, QuarkXPress com plugin ID2Q XTension
ini: Bloco de notas, Microsoft Office Word, Notepad++, Bred 3, editor PSPad
ipa: Instale no iPhone, iPod Touch ou iPad
iso: PowerISO, Álcool 120%, DAEMON Tools, UltraISO, WinRAR
isz: UltraISO, Álcool 120%, DAEMON Tools, WinMount
ithmb: conversor iThmb
iwd: Activision Call of Duty 2, Activision Call of Duty 4, descompactando usando WinZip 12 Pro - avaliação gratuita
jad: MidpX, LogoManager Mobile Media Browser, JADMaker, bem como qualquer editor de texto
jar: Java Runtime 1.1
jfif: qualquer editor de imagens ou navegador da web
jnlp: Oracle Java Web Start, bem como qualquer editor de texto
jp2: Adobe Photoshop, Adobe Photoshop Elements, ACD Systems ACDSee, ACD Systems Canvas, CorelDRAW Graphics Suite
jpa: JoomlaPack eXtract
jpe: IrfanView, XnView, ACDSee, ACD Systems Canvas, Paint.NET
jpeg: IrfanView, XnView, ACDSee, ACD Systems Canvas, Paint.NET
jpg: XnView, ACDSee, Paint.NET, Adobe Photoshop
jquery:-
js: Adobe Dreamweaver, qualquer navegador e qualquer editor de texto
kar: Nullsoft Winamp, Light Alloy, KarMaker, KarPlayer, Recisio KaraFun
chave: qualquer editor de texto
kml: Google Earth, Merkaartor, SketchUp, Rinoceronte (Rinoceronte)
kmz: Google Earth, Merkaartor, SketchUp, Rinoceronte (Rinoceronte)
kwm: WebMoney Keeper clássico
configuração: Splan, Sprint Layout
licença: Bred 3, Notepad, Notepad++, editor PSPad
lng: qualquer editor de texto, bem como Nullsoft Winamp, Adobe Acrobat, Audiograbber, AVG Anti-Virus
lnk: Clique duplo, Flint LinkInfo
log: editor PSPad, Notepad++, Bred 3, Microsoft Word, bloco de notas
sem perdas: winamp
lrf: Sony Reader Library, Calibre, BookDesigner, Makelrf, Canon Book Creator, Microsoft C/C++
lst: Microsoft Visual Studio, bem como qualquer editor de texto (bloco de notas)
ltx: STALKER
lvf: software de webcam da Logitech
m2ts: Sony Picture Motion Browser (PMB), CyberLink PowerDVD, VideoLAN VLC Media Player, Media Player Classic, Nero Show Time
m3d: CorelDRAW Graphics Suite, Askon KOMPAS, Sony EverQuest, Rockstar Games Grand Theft Auto: Vice City, Aurora 3D Text & Logo Maker
m3u: Nullsoft Winamp, VLC Media Player, RealNetworks RealPlayer, KMPlayer, Apple iTunes
m4a: Nullsoft Winamp, VLC Media Player, RealNetworks RealPlayer, KMPlayer, Apple iTunes
m4b: Nullsoft Winamp, VLC Media Player, RealNetworks RealPlayer, KMPlayer, Apple iTunes
m4v: Nullsoft Winamp, VLC Media Player, RealNetworks RealPlayer, KMPlayer, Apple iTunes
mapa: Atlas MapMaker
máximo: Autodesk 3ds Max
mcd: PTC Mathcad, SMathStudio Desktop
md5: IsoBuster, MD5Summer, MD5 Checker, SlavaSoft FSUM
md80: IsoBuster, MD5Summer, MD5 Checker, SlavaSoft FSUM
mdb: Microsoft Access, Microsoft Visual Studio, Microsoft Excel, OpenOffice.org Base, MDB Viewer Plus
mde: Microsoft Access
mdf: WinRAR, Álcool 120%, UltraISO, DAEMON Tools, IsoBuster
mdi: imagem de documento do Microsoft Office
mdl: MathWorks Simulink
mds: Álcool 120%, DAEMON Tools, CyberLink PowerDVD, UltraISO, MagicISO
mdx: Ferramentas DAEMON, Astroburn
mht: Opera, Internet Explorer, Microsoft Word, Kingsoft Writer, WizBrother WizHtmlEdito
mif: SISContents, Mif Manager (requer Python), SmartSIS, miftool (requer Python)
mim: Microsoft Outlook, Microsoft Outlook Express, StuffIt Deluxe, WinZip, ALZip
mkv: Windows Media Player com plug-in Matroska DirectShow, Media Player Classic, Zoom Player, MPlayer, VLC Media Player 
mobi: FBReader, STDU Viewer, Calibre, Mobipocket Reader, Amazon Kindle
mod: FBReader, STDU Viewer, Calibre, Mobipocket Reader, Amazon Kindle
mov: Apple QuickTime Player, Windows Media Player, Media Player Classic, MPlayer, Roxio Creator
mp3: Nullsoft Winamp, AIMP, Media Player Classic, VLC Media Player, Windows Media Player
mp4: Nullsoft Winamp, AIMP, Media Player Classic, VLC Media Player, Windows Media Player
mpeg4: Media Player Classic, Zoom Player, Windows Media Player, RealNetworks RealPlayer, VLC Media Player 
mpg: Media Player Classic, Zoom Player, Windows Media Player, RealNetworks RealPlayer, VLC Media Player 
mpo: Adobe Photoshop, CyberLink PowerDVD, Stereomerger, StereoPhoto Maker, STOIK Imaging Imagic
mpp: Microsoft Project, Seavus Project Viewer, Stand By Soft RationalPlan, Housatonic Project Viewer, KaDonk LiveProject Viewer
mpq: Editor MPQ, Biblioteca StormLib, SCMDraft, Addon Studio para World of Warcraft
mpqe: Editor MPQ, Biblioteca StormLib, SCMDraft
mq4: MetaQuotes MetaTrader
msg: Microsoft Outlook, The Bat!, Priasoft MSG File Viewer e Assessor, Encryptomatic MsgViewer Pro, Pegasus Mail
msi: Microsoft Windows Installer, 7-Zip, extrator universal
mso: Microsoft Outlook
msu: Microsoft Windows Update
mtf: Klyaksa.net MyTest
mts: CyberLink PowerDVD, Ulead VideoStudio, Corel WinDVD Plus Blu-ray, Sony Vegas Movie Studio Platinum, Sony Vegas Pro
Mus: Finale NotePad - grátis, Finale, SmartMusic
mxf: Avid Media Composer, Adobe Premiere, VLC Media Player, Sony Vegas Pro, Pavtube Video Converter
mxl: 1C: Empresa, 1C: Trabalhando com arquivos
nbf: WinRAR, analisador NBF, analisador NBU, Nokia Suite
nbu: Nokia Suite, Nokisoft Noki, NbuExplorer, NBU Parser, Jumping Bytes Mobile Master
nef: XnView, Adobe Photoshop, ACDSee, Nikon photo RAW, Nikon View
nes: VirtuaNES, Nestopia, NesterJ, FakeNES, Jnes
nfo: GetDiz, NFOPad, Compact NFO Viewer, bem como qualquer editor de texto
nfs: OpenVMS
nm2: Navitel Navegador
nm3: Navitel Navegador
npf: Backup NTI agora, NTI DriveBackup!
nrg: Nero, UltraISO, IsoBuster, MagicISO
nrw: Adobe Photoshop Elements, Corel PaintShop Pro, Nikon Transfer, Nikon ViewNX, Nikon Capture NX
o3d: API javascript
obb: Console do desenvolvedor do Google Play, 7-Zip, WinRAR
obj: Rinoceronte (Rinoceronte), Autodesk 3ds Max, Autodesk Maya, Blender, Autodesk AutoCAD
odg: OpenOffice.org, LibreOffice
odp: Apache OpenOffice (OpenOffice.org) Impress, LibreOffice Impress, Microsoft PowerPoint 2010 e posterior
programas: OpenOffice.org Calc, Microsoft Excel, LibreOffice Calc, IBM Lotus Symphony, StarOffice
odt: OpenOffice.org (Writer), LibreOffice, Corel WordPerfect Office, AbiWord, TextMaker
ogf: Mestre OGF
ogg: Nullsoft Winamp, AIMP, MPlayer, BSplayer, VLC Media Player 
oms: OperaVini PC Helper
1:Microsoft OneNote
orf: Adobe Photoshop, Adobe Photoshop Lightroom, CorelDRAW Graphics Suite, ACD Systems Canvas, ACDSee
ost: Microsoft Outlook, Visualizador OST gratuito, Ferramenta de verificação de integridade Microsoft OST, Remo Convert OST para PST, SysTools OST Recovery
otd: OpenOffice 
ozfx3: OziExplorer, Androzic, DeMapper
p7e: 7-zip
p7s:7-zip
páginas: páginas da Apple - para MacOS, EZ Freeware Free Opener
pacotes: WinRAR, WinZip, Leinen PAK Explorer, Pak Explorer, Sprite Explorer
parte: Mozilla Firefox, gerenciador de download gratuito, Go!Zilla, FlashGet, DrSiRiUs eMule Plus
pat: Adobe Photoshop, ACD Systems Canvas, Corel PaintShop, Corel WordPerfect Office, GIMP
pbo:Ferramentas de BI 2
pbp: PBP Unpacker, PSP Brew, psx2psp, EBOOT2ISO
pcb: Altium Designer, Altium Designer Viewer (gratuito), Altium P-CAD, P-CAD 2006 Viewer (gratuito), Cadence OrCAD
pck: Gerenciador de configuração do Microsoft System Center, ferramenta de pacote de pré-carregamento da Microsoft
pcx: Adobe Photoshop, Adobe Photoshop Lightroom, Adobe Premiere Pro, Adobe Illustrator, Inkscape
pdb: Palm Desktop, XnView, Calibre, conversor de PDF online, iSilo
pdf: Foxit Reader, STDU Viewer, Adobe Reader, Adobe Acrobat, Adobe InDesign
pdn: Paint.NET, Chasys Draw IES
pdo: Pepakura Designer, Pepakura Viewer
php: Você pode abrir e executar em um servidor com php instalado., Denwer
pacote: Apple Installer, CharlesSoft Pacifist
pln: Adobe InDesign
plt: IMSI TurboCAD, Autodesk AutoCAD, CorelDRAW Graphics Suite, Corel WordPerfect Office, IrfanView
pmd: Adobe PageMaker, Adobe InDesign
png: Adobe Photoshop, Adobe Illustrator, ACDSee, IrfanView, Paint.NET
pote: Microsoft PowerPoint, Kingsoft Presentation
pps: Microsoft PowerPoint, Microsoft PowerPoint Viewer, OpenOffice.org, Ability Office
ppsx: Microsoft PowerPoint 2007 e posterior, OpenOffice.org, Ability Office Presentation, Microsoft PowerPoint Viewer, Kingsoft Presentation
ppt: LibreOffice Impress, OpenOffice.org Impress, Corel WordPerfect Office, Ability Office, Nuance OmniPage
pptx: LibreOffice Impress, OpenOffice.org Impress, Corel WordPerfect Office, Ability Office, Nuance OmniPage
prn: Impressão bruta gratuita, AllWeb FastPrint
prt: Autodesk Inventor, Blender, PTC Creo (Pro/ENGINEER), Okino Computer Graphics PolyTrans, Adobe Acrobat
ps: Adobe Illustrator, Adobe Photoshop, Adobe Photoshop Lightroom, ACD Systems Canvas, ACDSee
psd: Adobe Photoshop, Adobe Photoshop Elements, Adobe InDesign, ACDSee Photo Manager, Corel PaintShop
pst: Microsoft Outlook, Microsoft Outlook Express, MailNavigator, Microsoft Exchange Server, BitDaddys Email Open View Pro
psw: Visualizador do TextMaker
pub: Microsoft Office Publisher, Adobe InDesign com plugin PUB2ID, CorelDRAW
pwi: Microsoft Office Word, Microsoft Office OneNote, Microsoft Works 
pws: Workshop de impressão ValuSoft
qdb: Intuit Quicken
qhf: QIP 2012, QIP Mobile, QIP PDA, QIP 2010, QIP Infium
qlitedb: SQLite, navegador de banco de dados SQLite, Navicat para SQlite, Sqliteman
qrp: Zyl Soft RepView, Dr. Regener QuickReport-Viewer, software responsivo QRP Viewer, 3Engine QuickReport Viewer
raf: Adobe Photoshop Lightroom, Adobe Photoshop
memória RAM: Real Media Player
rar: WinRAR, 7-Zip, WinZip, ZipZag, PeaZip
bruto: Adobe Photoshop, Adobe Photoshop Lightroom, XnView, JRiver Media Center, Dcraw
rcf: Cliente VPN Global SonicWALL
rdf: Mozilla Firefox, Oxygen XML Editor, Mozilla SeaMonkey, Altova XMLSpy, Liquid XML Studio
rec: Squared 5 MPEG Streamclip, reprodutor de mídia VideoLAN VLC, Elecard MPEG Player, VideoReDo
rem: Research In Motion BlackBerry Desktop Manager
res: Delphi, Construtor C++
rms: RealNetworks RealPlayer
rmvb: RealNetworks RealPlayer, VLC Media Player, Media Player Classic, Adobe Premiere, Quicktime PRO
rom: Nemu64, Project64, UltraHLE, Mupen64, SupraHLE
rpt: Bred 3, Notepad++, editor PSPad, Bloco de Notas
rsc: Nokia Symbian rcomp
rtf:WordPad do Windows
run: Execute no Linux com o comando ./filename.run
rw2: Adobe Photoshop, Adobe Photoshop Lightroom, ACD Systems Canvas, ACDSee, Corel PaintShop
sat: Spatial ACIS Modeler, IMSI TurboCAD, Autodesk AutoCAD, Ashlar-Vellum Cobalt, Argon ou Xenon, Kubotek CADKEY
sav: Half-Life 2, Dune, outro jogo que criou o arquivo
sch: Esquema P-CAD, Visualizador P-CAD
scm:ScreenCam
scs: Driver de ônibus, SCS Prism3D, WinRAR, extrator Scs
sde: dados exportados do SDE Drumbeat, arquivo de criptografia de disco SDE Steganos
sdf: dBASE, Pervasive PSQL, Rosenvick AspireGold
sfo: Desempacotador PBP
sgdt: ​​​​Vários jogos FreeSweetGames
shs: Microsoft Office Word, Microsoft Office Excel
shx: Autodesk AutoCAD
sid: MrSID
sig: Microsoft Outlook, Microsoft Outlook Express, QUALCOMM Eudora, Crypto Pro
sis: Nokia Suite, UnSIS (UnMakeSIS), Easy SIS Creator, emulador de Palm OS, SISContents
skp: SketchUp, Rinoceronte (Rinoceronte), IMSI TurboCAD
sldprt: Dassault Systemes SolidWorks, Autodesk Inventor Fusion, Adobe Acrobat
smc: ZSNES, no$sns, Snes9x, SnEM, SNEeSe
smd: Gens, Gens Plus!, Fusão, HazeMD
snp:Microsoft Access
spb: Samsung Kies
spl: Plano
spl7:Splan
spr: Microsoft Visual FoxPro
spx: AIMP, VLC Media Player, Apple QuickTime Player com plugin XiphQT, Windows Media Player com filtro DirectShow, Foobar2000
sql: Microsoft Access, Microsoft Visual Studio, Adobe Dreamweaver, Nvu, Navicat para MySQL
sqlite: SQLite, Sqliteman, Navicat para SQLite, Database Master, Autodesk AutoCAD Map 3D
srt: SubRip, SRT2SUP, SubtitleCreator, Edição de legendas
etapa: COMPASS, IMSI TurboCAD, Autodesk Inventor Fusion, Rhinoceros (Rhino), Dassault Systemes CATIA ou DELMIA
stl: Autodesk Inventor, Dassault Systemes SolidWorks, IMSI TurboCAD, Rhinoceros (Rhino), Blender
estoque: PRO100
stp: CATIA, QuickStep, Delcam Exchange, ideaMK STP Viewer, LKSoft IDA-STEP
sub: CyberLink PowerDVD, MPlayer, Universal Subtitle Viewer, SoftNI Subtitler Suite
SVG: Adobe Flash Player, Corel PaintShop, Microsoft Visio, Inkscape, Merkaartor
swf: Opera, Mozilla Firefox, Google Chrome, Internet Explorer, Adobe Flash Player
sys: Microsoft Windows, MS-DOS, OS/2
alcatrão: WinRAR, WinZip, 7-Zip, AlZip, StuffIt Deluxe
tdb: eBay Turbo Lister
técnica: FileViewPro. 
tga: Adobe Premiere Pro, ACDSee, Adobe Photoshop, Inkscape, Apple QuickTime Player 
pacote de tema: WinRAR
thm: Fotos do Microsoft Windows, Visualizador de fotos do Microsoft Windows, ACD Systems ACDSee
nome: Acronis True Image
tif: XnView, Corel PaintShop, CorelDRAW Graphics Suite, Adobe Photoshop, Adobe Illustrator
tiff: XnView, Corel PaintShop, CorelDRAW Graphics Suite, Adobe Photoshop, Adobe Illustrator
tmp: editor de texto
torrent: utorrent
tpl: Bloco de notas, Bred 3, editor PSPad, Notepad++
ts: DRD Systems VideoReD, VobEdi, Squared 5 MPEG Streamclip
ttf: FontCreator, visualizador de fontes do Windows
txd: Visualizador VC TXD, Construtor TXD, Vice TXD
txt: Notepad, editor PSPad, Notepad++, Bred 3 e outros editores de texto
udf: IsoBuster, UltraISO, Nero, 7-Zip, MagicISO
udx: o programa que criou o arquivo
uif: MagicISO, PowerISO, gBurner, UIF2ISO, Conversor UIF para ISO
undf: Media Player Classic, Windows Media Player, CyberLink PowerDVD, K-Lite Mega Codec Pack
vbs: Microsoft Visual Studio, Adobe Dreamweaver
vcd: CD virtual do software H+H, IsoBuster, PowerISO, Roxio Creator NXT Pro, WinMount
vce: Visual CertExam Suite
vcf: Nokia Suite, Palm Desktop, QUALCOMM Eudora, Open Contacts, Bailey Handy Address Book
vdf:todos os produtos Avira
vhd: IsoBuster, Servidor Virtual, Microsoft Virtual PC, WinMount
vid: Windows Media Player, Apple QuickTime Player, QTUM AVI Converter e outros reprodutores de vídeo
vídeo ts: JetAudio7 
visão:Microsoft office
vmdk: VMware Workstation, VMware Player, VMware Server, VMware Fusion, Sun xVM
vmg: Nokia Suite, ABC Amber Nokia Converter, bloco de notas
vnt: bloco de notas, bem como qualquer editor de texto
vob: Media Player Classic, Windows Media Player, Zoom Player, MPlayer, VLC Media Player 
vol: Dragão UnPACKer
vp6: On2 Technologies Flix para vídeo Flash, Adobe Flash Player 8 ou posterior, Windows Media Player com Storm Codec, VLC Media Player, Media Player Classic
vpk: GCFScape, Extrator VPK de Gibbed, VPK.exe de Left 4 Dead Authoring Tools
vrf: Flagship Industries Ventrilo
vro: VLC Media Player, Apple QuickTime Player com plugin, reprodução MPEG-2, CyberLink PowerDVD, Corel WinDVD
vsd: Microsoft Visio, Visualizador do Visio, Documento do Visio
vvf: VVFPlayer
w3g: Blizzard WarCraft III
maço: ZipZag
wav: Windows Media Player, Media Player Classic, Apple QuickTime Player, Nullsoft Winamp, AIMP
wbfs: Gerenciador WBFS, WiiJManager, Wii Unscrambler, Wii Game Manager, Wii Backup Manager
arquivo da web: Apple Safari
webm: qualquer navegador
webp: Adobe Photoshop, Google Chrome, Opera, Logipole Konvertor
wim: 7-Zip, PeaZip, GImageX, WinMount, Microsoft ImageX
wlmp:Windows Movie Maker
wmf: Nero
wmv: Media Player Classic, Windows Media Player, CyberLink PowerDVD, Roxio Creator
wmz:7-Zip, WinRar
wotreplay: Wargaming.net World of Tanks, WOT Replays Manager, WOT Replay Parser
wps: Microsoft Works, Microsoft Office Word, LibreOffice Writer
wrl: Blender, IMSI TurboCAD Deluxe, Autodesk Maya, FreeWRL
wv: WavPack, AIMP
xap: Internet Explorer, Mozilla Firefox
xls:Microsoft Office Excel
xlsx: Microsoft Office Excel, Visualizador do Microsoft Excel
xml: Editor XML de oxigênio, Microsoft Visual Studio, Microsoft Excel
xpart: XPlayerX
xpi: Mozilla Thunderbird, Mozilla Firefox, Mozilla SeaMonkey
xps: Mozilla Thunderbird, Mozilla Firefox, Mozilla SeaMonkey
xsd: criador de padrões para ponto cruz
xsl: FileMaker ou qualquer programa que suporte folhas de estilo XML
xvid: Zoom Player, Media Player Classic, MPlayer, VLC Media Player 
xz: 7-Zip
zip: 7-Zip, WinRar

Não tem o formato de arquivo que você precisa? Escreva nos comentários e com certeza aparecerá nesta lista.

O programa também irá ajudá-lo a combater extensões desconhecidas Consultor de Arquivo Inteligente (siga o link que você será levado ao site do desenvolvedor).

Ou tente encontrar o que você precisa nos sites:

• www.filefacts.net
• www.open-file.ru