Welcome to the PC Pitstop File Extension Library, the internet's most complete and comprehensive source for file extension information. Over the years PC Pitstop has developed numerous free scans that diagnose various PC performance issues. Over 200 million scans that have been run all over the world contribute to our file extension libraries.

Welcome to the PC Pitstop File Extension Library

PC Pitstop's File Extension Library is the internet's most complete and comprehensive source for file extension information. Over the years PC Pitstop has developed numerous free scans that diagnose various PC performance issues. Over 200 million scans that have been run all over the world contribute to our file extension libraries.


To find the latest driver for your computer we recommend running our Free Driver Scan.

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To make your own comment about your PC and to find out how to make your computer faster, try running our Free PC Matic Scan.

Search For File Extensions

File Extension


50 Most Common Extensions

Extension Most Used Application File Name
reg Registry Editor regedit.exe
wtx Notepad notepad.exe
log Notepad notepad.exe
txt Notepad notepad.exe
scp Notepad notepad.exe
vbs Microsoft ® Windows Based Script Host wscript.exe
mp2v Windows Media Player wmplayer.exe
mpv2 Windows Media Player wmplayer.exe
hta Microsoft (R) HTML Application host mshta.exe
mpe Windows Media Player wmplayer.exe
mpa Windows Media Player wmplayer.exe
m1v Windows Media Player wmplayer.exe
msi Windows® installer msiexec.exe
inf Notepad notepad.exe
msc Microsoft Management Console mmc.exe
jse Microsoft ® Windows Based Script Host wscript.exe
js Microsoft ® Windows Based Script Host wscript.exe
ini Notepad notepad.exe
msrcincident Windows Remote Assistance msra.exe
qds Directory Service Find dsquery.dll
vbe Microsoft ® Windows Based Script Host wscript.exe
compositefont Notepad notepad.exe
wsh Microsoft ® Windows Based Script Host wscript.exe
wsf Microsoft ® Windows Based Script Host wscript.exe
scf Windows Explorer explorer.exe
Extension Most Used Application File Name
htm Internet Explorer iexplore.exe
wsc Notepad notepad.exe
xbap Windows Presentation Foundation Host presentationhost.exe
xaml Windows Presentation Foundation Host presentationhost.exe
msu Windows Update Standalone Installer wusa.exe
udl OLE DB Core Services oledb32.dll
html Internet Explorer iexplore.exe
msstyles Windows Shell Common Dll desk.cpl
theme Windows Shell Common Dll desk.cpl
p7c Windows Contacts wab.exe
nfo System Information msinfo32.exe
wab Windows Contacts wab.exe
mod Windows Media Player wmplayer.exe
contact Windows Contacts wab.exe
group Windows Contacts wab.exe
mhtml Internet Explorer iexplore.exe
wmx Windows Media Player wmplayer.exe
wms Windows Media Player wmplayer.exe
wmz Windows Media Player wmplayer.exe
mht Internet Explorer iexplore.exe
chm Microsoft® HTML Help Executable hh.exe
wmd Windows Media Player wmplayer.exe
wvx Windows Media Player wmplayer.exe
m2v Windows Media Player wmplayer.exe
pbk Remote Access Phonebook rasphone.exe

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