Category
Executables File Signatures
Executable, library, and bytecode formats — Windows PE, ELF, Mach-O, Java class, WebAssembly — and their identifying headers.
27 formats in this category
.a
Safe
A
3D 3C 61 72 3E
.aar
Safe
AAR
50 4B 03 04
.apk
Safe
Android package
50 4B 03 04
.axf
Safe
AXF
7F 45 4C 46
.class
Safe
Java bytecode file
CA FE BA BE
.com
High
Windows/DOS executable file
4D 5A
.cpl
High
Control panel application
4D 5A
.dex
Safe
Dalvik executable file
64 65 78 0A
.dll
High
Windows/DOS executable file
4D 5A
.drv
Safe
Windows/DOS executable file
4D 5A
.elf
Safe
ELF
7F 45 4C 46
.exe
High
Windows/DOS executable file
4D 5A
.jar
High
Java archive; compressed file package for classes and data
50 4B 03 04
.ko
Safe
KO
7F 45 4C 46
.msi
High
Microsoft Installer package
D0 CF 11 E0 A1 B1 1A E1
.none
Safe
NONE
7F 45 4C 46
.o
Safe
O
7F 45 4C 46
.ocx
Safe
ActiveX or OLE Custom Control
4D 5A
.out
Safe
OUT
7F 45 4C 46
.prx
Safe
PRX
7F 45 4C 46
.puff
Safe
PUFF
7F 45 4C 46
.qts
Safe
Windows/DOS executable file
4D 5A
.qtx
Safe
Windows/DOS executable file
4D 5A
.scr
High
Screen saver
4D 5A
.so
Safe
SO
7F 45 4C 46
.sys
High
Windows/DOS executable file
4D 5A
.wasm
Safe
Wasm
00 61 73 6D