Sample code for 30+ languages & platforms
AutoIt

UnGzip .tgz to get a .tar

See more Tar Archive Examples

A .tgz is simply a TAR archive compressed using GZip. It is also commonly referred to as a .tar.gz. Chilkat GZip can be used to ungzip to get an uncompressed .tar.

Chilkat AutoIt Downloads

AutoIt
Local $bSuccess = False

$oGzip = ObjCreate("Chilkat.Gzip")

$bSuccess = $oGzip.UncompressFile("qa_data/tar/test.tgz","qa_output/test.tar")
If ($bSuccess <> True) Then
    ConsoleWrite($oGzip.LastErrorText & @CRLF)
Else
    ConsoleWrite("success." & @CRLF)
EndIf