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They are identical formats. TGZ is simply a shorter file extension for TAR.GZ, used on systems that don't support double extensions. Both contain a TAR archive compressed with GZIP.
Windows 10/11 include native TAR support via command line, but it's not integrated into Explorer. For easier access, convert to ZIP which Windows handles natively, or install 7-Zip for TAR.GZ support.
Convert to 7Z or TAR.XZ for maximum compression—both can reduce file sizes by 20-40% compared to TAR.GZ. TAR.BZ2 offers moderate improvement. ZIP provides similar compression to GZIP.
TAR formats (TAR.BZ2, TAR.XZ) preserve Unix permissions. Converting to ZIP or 7Z may lose permission information as these formats don't fully support Unix metadata. Convert to TAR variants for Linux deployment.
TAR.GZ combines fast decompression with good compression, and preserves Unix file attributes. It's supported natively on all Unix systems without additional software, making it ideal for software distribution.
Convert to ZIP for email. ZIP is universally recognized by email clients and recipients, while TAR.GZ may be flagged as suspicious or unfamiliar to Windows users.
We support TAR.GZ files up to 500MB. For larger archives, use command-line tools or 7-Zip desktop software which can handle files of any size.
For distribution over slow networks, yes—TAR.XZ is 20-40% smaller. For local storage or fast networks, TAR.GZ's faster decompression may be preferable. Consider your use case.