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File Extensions

Open that Unknown File!

Welcome to the PC Matic File Extension Library, the internet's most complete and comprehensive source for file extension information. Over the years PC Matic 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.

File Extension Library

PC Matic's File Extension Library is the internet's most complete and comprehensive source for file extension information. Over the years PC Matic 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.

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50 Most Common Extensions

Extension Most Used Application File Name
reg Registry Editor regedit.exe
wtx Notepad notepad.exe
vbs Microsoft ® Windows Based Script Host wscript.exe
log Notepad notepad.exe
txt Notepad notepad.exe
msi Windows® installer msiexec.exe
msc Microsoft Management Console mmc.exe
jse Microsoft ® Windows Based Script Host wscript.exe
wsf Microsoft ® Windows Based Script Host wscript.exe
qds Directory Service Find dsquery.dll
vbe Microsoft ® Windows Based Script Host wscript.exe
wsh Microsoft ® Windows Based Script Host wscript.exe
scf Windows Explorer explorer.exe
wsc Notepad notepad.exe
msstyles Windows Shell Common Dll desk.cpl
msu Windows Update Standalone Installer wusa.exe
udl OLE DB Core Services oledb32.dll
theme Personalization CPL themecpl.dll
compositefont Notepad notepad.exe
p7c Windows Contacts wab.exe
wab Windows Contacts wab.exe
xbap Windows Presentation Foundation Host presentationhost.exe
xaml Windows Presentation Foundation Host presentationhost.exe
scp Notepad notepad.exe
js Microsoft ® Windows Based Script Host wscript.exe
inf Notepad notepad.exe
ini Notepad notepad.exe
nfo System Information msinfo32.exe
hlp Windows Winhlp32 Stub winhlp32.exe
msp Windows® installer msiexec.exe
chm Microsoft® HTML Help Executable hh.exe
xrm-ms Internet Explorer iexplore.exe
pbk Remote Access Phonebook rasphone.exe
emf Paint mspaint.exe
url Internet Browser ieframe.dll
rat Internet Ratings and Local User Management DLL msrating.dll
hta Microsoft (R) HTML Application host mshta.exe
sct Notepad notepad.exe
rle Paint mspaint.exe
xsl Internet Explorer iexplore.exe
wmf Paint mspaint.exe
psc1 Windows PowerShell powershell.exe
evt Event Viewer Snapin Launcher eventvwr.exe
evtx Event Viewer Snapin Launcher eventvwr.exe
xml Internet Explorer iexplore.exe
zip Windows Explorer explorer.exe
rtf Microsoft Office Word winword.exe
ps1 Notepad notepad.exe
psm1 Notepad notepad.exe
psd1 Notepad notepad.exe




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