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