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Quick reference, email attachment.
List of file types.
Sort order: by extension (ending letters),
by rating
More information is available at my
More information, email attachment safety.
Ending Letters |
|
Description of file |
Safety Rating |
| |
|
|
.alx |
![](images/icon_ca.gif) |
HTML Layout |
Caution, low risk |
.asp |
![](images/icon_ca.gif) |
Active Server Page, web page definition |
Caution, may contain nasty programming |
.au |
![](images/icon_ok.gif) |
audio, basic |
Safe, common |
.avi |
![](images/icon_ok.gif) |
video |
Safe, common |
.bas |
![](images/icon_st.gif) |
script, Basic programming lanquage |
Dangerous, Common |
.bat |
![](images/icon_st.gif) |
script, DOS batch file |
Dangerous, Common |
.bin |
![](images/icon_st.gif) |
application/octet-stream" |
Dangerous, non-standard |
.bmp |
![](images/icon_ok.gif) |
image, bit-map |
Safe, common |
.c |
![](images/icon_st.gif) |
programming, C++ |
Dangerous, non-standard |
.cab |
![](images/icon_ca.gif) |
compressed file storage |
Caution, may contain infected files |
.cda |
![](images/icon_ca.gif) |
audio, CD format |
Safe, non-standard |
.cdr |
![](images/icon_ok.gif) |
data, Corel Draw |
Safe, common |
.chf |
![](images/icon_ca.gif) |
PCAnywhere, remote control config |
Safe, non-standard |
.cmd |
![](images/icon_st.gif) |
script, advanced batch file |
Dangerous, Common |
.com |
![](images/icon_st.gif) |
program, older DOS |
Dangerous, Common |
.cpl |
![](images/icon_st.gif) |
Control Panel application |
Dangerous, non-standard |
.cur |
![](images/icon_ca.gif) |
Cursor (pointer) definition |
Caution, low risk |
.dic |
![](images/icon_ca.gif) |
Dictionary |
Caution, low risk |
.dll |
![](images/icon_st.gif) |
program helper file (Dynamic Link Library) |
Dangerous, Common |
.doc |
![](images/icon_ca.gif) |
MS Word Document |
Caution, may contain nasty programming |
.dot |
![](images/icon_ca.gif) |
MS Word Template, for starting a new document |
Caution, low risk |
.drw |
![](images/icon_ok.gif) |
CAD, drawing file |
Safe, common |
.dwg |
![](images/icon_ok.gif) |
CAD, Adobe Illustrator, drawing file |
Safe, common |
.dxf |
![](images/icon_ok.gif) |
CAD, universal Data eXchange Format |
Safe, common |
.eml |
![](images/icon_st.gif) |
Microsoft Internet Mail Message |
Dangerous, Common |
.eps |
![](images/icon_ok.gif) |
image, post script |
Safe, common |
.exe |
![](images/icon_st.gif) |
program, 'executable' |
Dangerous, Common |
.fav |
![](images/icon_ca.gif) |
Outlook Navigator Bar File |
Caution, could activate local program |
.gif |
![](images/icon_ok.gif) |
image, internet |
Safe, common |
.grp |
![](images/icon_ca.gif) |
windows program manager file |
Caution, could activate local program |
.gtar |
![](images/icon_ca.gif) |
compressed file storage |
Caution, may contain infected files |
.gwf |
![](images/icon_ca.gif) |
PCAnywhere Gateway File |
Safe, non-standard |
.gz |
![](images/icon_ca.gif) |
compressed file storage |
Caution, may contain infected files |
.hlp |
![](images/icon_ca.gif) |
help file |
Safe, non-standard |
.ht |
![](images/icon_ca.gif) |
Hyperterminal setting file |
Safe, non-standard |
.htm |
![](images/icon_ca.gif) |
web page, Hyper Text Markup File |
Caution, low risk |
.html |
![](images/icon_ca.gif) |
web page, Hyper Text Markup File |
Caution, low risk |
.ico |
![](images/icon_ok.gif) |
icon file |
Safe, common |
.img |
![](images/icon_ok.gif) |
image file |
Safe, common |
.inf |
![](images/icon_ca.gif) |
information file, usually for install |
Caution, local settings could be altered |
.ini |
![](images/icon_ca.gif) |
initialization information, settings |
Caution, local settings could be altered |
.iso |
![](images/icon_ca.gif) |
CD-Recordable image |
Safe, non-standard |
.java |
![](images/icon_st.gif) |
programming, internet universal scripting |
Dangerous, non-standard |
.jpeg |
![](images/icon_ok.gif) |
image, internet |
Safe, common |
.jpg |
![](images/icon_ok.gif) |
image, internet |
Safe, common |
.js |
![](images/icon_st.gif) |
programming, javascript (see .java) |
Dangerous, non-standard |
.jse |
![](images/icon_st.gif) |
scipt |
Dangerous, non-standard |
.ldb |
![](images/icon_ca.gif) |
MS Access, lock file |
Safe, non-standard |
.lnk |
![](images/icon_ca.gif) |
link - shortcut definition |
Caution, could activate local program |
.log |
![](images/icon_ok.gif) |
log file - generic |
Safe, common |
.mdb |
![](images/icon_ok.gif) |
MS Access, database file |
Safe, common |
.mde |
![](images/icon_ok.gif) |
MS Access, database file (can't change design) |
Safe, common |
.mdw |
![](images/icon_ca.gif) |
MS Access, workgroup security file |
Safe, non-standard |
.mid |
![](images/icon_ok.gif) |
audio, MIDI file |
Safe, common |
.midi |
![](images/icon_ok.gif) |
audio, MIDI file |
Safe, common |
.mov |
![](images/icon_ok.gif) |
movie, quicktime format |
Safe, common |
.movie |
![](images/icon_ok.gif) |
movie, sgi format |
Safe, common |
.mp1 |
![](images/icon_ok.gif) |
audio, mpeg format |
Safe, common |
.mp2 |
![](images/icon_ok.gif) |
audio, mpeg format |
Safe, common |
.mp3 |
![](images/icon_ok.gif) |
audio, mpeg format |
Safe, common |
.mpeg |
![](images/icon_ok.gif) |
video, MS format |
Safe, common |
.mpg |
![](images/icon_ok.gif) |
video, MS format |
Safe, common |
.msg |
![](images/icon_ok.gif) |
message file |
Safe, common |
.msi |
![](images/icon_ca.gif) |
MS installer, package information |
Caution, local settings could be altered |
.msp |
![](images/icon_ca.gif) |
MS installer, patch information |
Caution, local settings could be altered |
.nws |
![](images/icon_ok.gif) |
Microsoft Internet News Message |
Safe, common |
.obd |
![](images/icon_ok.gif) |
MS Office Binder |
Safe, common |
.oft |
![](images/icon_ca.gif) |
MS Outlook Template |
Caution, low risk |
.pbk |
![](images/icon_ca.gif) |
phone book, Dial Up Networking & others |
Caution, local settings could be altered |
.pcl |
![](images/icon_ca.gif) |
output to printer, HP |
Safe, non-standard |
.pcx |
![](images/icon_ok.gif) |
image, black & white (fax) |
Safe, common |
.pdd |
![](images/icon_ok.gif) |
image, Photo Deluxe format |
Safe, common |
.pdf |
![](images/icon_ok.gif) |
Acrobat Reader document, Adobe Portable Document Format |
Safe, common |
.pic |
![](images/icon_ok.gif) |
image |
Safe, common |
.pif |
![](images/icon_st.gif) |
program start information file |
Dangerous, Common |
.pl |
![](images/icon_st.gif) |
PERL programming, UNIX internet server script |
Dangerous, non-standard |
.pot |
![](images/icon_ca.gif) |
MS Powerpoint Template |
Caution, low risk |
.pps |
![](images/icon_ok.gif) |
MS Powerpoint Slide Show |
Safe, common |
.ppt |
![](images/icon_ca.gif) |
MS Powerpoint data file |
Caution, may contain nasty programming |
.pub |
![](images/icon_ok.gif) |
MS Publisher data file |
Safe, common |
.qbb |
![](images/icon_ok.gif) |
Intuit Quick Books Backup file |
Safe, common |
.qbw |
![](images/icon_ok.gif) |
Intuit Quick Books work file |
Safe, common |
.qdb |
![](images/icon_ok.gif) |
Intuit Quicken data file |
Safe, common |
.ra |
![](images/icon_ok.gif) |
RealPlayer, real audio information |
Safe, common |
.reg |
![](images/icon_st.gif) |
Windows registry, import/export data |
Dangerous, Common |
.scr |
![](images/icon_st.gif) |
screen saver file |
Dangerous, Common |
.sct |
![](images/icon_st.gif) |
programming, scriptlet file" |
Dangerous, non-standard |
.shtml |
![](images/icon_ca.gif) |
web page, Secure Hyper Text Markup File |
Caution, low risk |
.snd |
![](images/icon_ok.gif) |
audio |
Safe, common |
.sys |
![](images/icon_ca.gif) |
system information file |
Caution, local settings could be altered |
.tar |
![](images/icon_ca.gif) |
compressed file storage (UNIX) |
Caution, may contain infected files |
.text |
![](images/icon_ok.gif) |
plain text |
Safe, common |
.tga |
![](images/icon_ok.gif) |
image |
Safe, common |
.tgz |
![](images/icon_ca.gif) |
compressed file storage (UNIX) |
Caution, may contain infected files |
.tif |
![](images/icon_ok.gif) |
image |
Safe, common |
.tsv |
![](images/icon_ok.gif) |
tab seperated values |
Safe, common |
.ttf |
![](images/icon_ca.gif) |
True Type Font |
Caution, local settings could be altered |
.txt |
![](images/icon_ok.gif) |
plain text |
Safe, common |
.url |
![](images/icon_ca.gif) |
Internet Shortcut |
Caution, could activate local program |
.uu |
![](images/icon_ca.gif) |
UUEncode, internet transfer format for all files |
Caution, may contain infected files |
.vbe |
![](images/icon_st.gif) |
programming, Visual Basic Scripting |
Dangerous, Common |
.vbs |
![](images/icon_st.gif) |
programming, Visual Basic Scripting |
Dangerous, Common |
.vir |
![](images/icon_ca.gif) |
Norton anti-virus definition file |
Caution, local settings could be altered |
.wav |
![](images/icon_ok.gif) |
audio |
Safe, common |
.wb2 |
![](images/icon_ca.gif) |
spreadsheet, Quattro |
Caution, may contain nasty programming |
.wbk |
![](images/icon_ca.gif) |
MS Word, backup file |
Caution, may contain nasty programming |
.wiz |
![](images/icon_ca.gif) |
MS Word, wizard defination |
Caution, may contain nasty programming |
.wk4 |
![](images/icon_ca.gif) |
spreadsheet, Lotus 123 |
Caution, may contain nasty programming |
.wks |
![](images/icon_ca.gif) |
spreadsheets, MS Excel worksheet |
Caution, may contain nasty programming |
.wma |
![](images/icon_ok.gif) |
audio |
Safe, common |
.wmf |
![](images/icon_ok.gif) |
MS windows metafile |
Safe, common |
.wpd |
![](images/icon_ca.gif) |
Word Perfect document |
Caution, may contain nasty programming |
.wri |
![](images/icon_ok.gif) |
document, MS Write |
Safe, common |
.wsc |
![](images/icon_st.gif) |
scriptlet file |
Dangerous, Common |
.wsf |
![](images/icon_st.gif) |
Script |
Dangerous, non-standard |
.wsh |
![](images/icon_st.gif) |
programming, windows scripting |
Dangerous, Common |
.xlk |
![](images/icon_ca.gif) |
MS Excel, backup file |
Caution, may contain nasty programming |
.xls |
![](images/icon_ca.gif) |
MS Excel, spreadsheet book |
Caution, may contain nasty programming |
.xlt |
![](images/icon_ca.gif) |
MS Excel, new spreadsheet template |
Safe, non-standard |
.xml |
![](images/icon_ca.gif) |
web page, Extended Markup Lanquage |
Caution, could activate local program |
.z |
![](images/icon_ca.gif) |
compressed file storage (UNIX) |
Caution, may contain infected files |
.zip |
![](images/icon_ca.gif) |
compressed file storage |
Caution, may contain infected files |
|
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