.GZ file extension
To open .GZ files on Windows, download and install 7-Zip or WinRAR.
.gz files are gzip-compressed files that require decompression before accessing their contents. Use software like 7-Zip or built-in tools on different platforms to open them.
Last updated: March 19, 2026 · Reviewed by Julian Stricker
Open on your device
Choose your operating system for a dedicated step-by-step opening guide.
How to open .GZ files
Use these platform-specific instructions to open .GZ files safely.
Windows
- Download and install 7-Zip or WinRAR.
- Right-click the .gz file and select 'Extract Here' or 'Open with' to decompress.
- For .tar.gz files, extract twice or use 7-Zip's direct extraction option.
Mac
- Double-click the .gz file in Finder to decompress it.
- For command-line control, open Terminal and use 'gunzip filename.gz'.
Linux
- Open Terminal and run 'gunzip filename.gz' to decompress.
- For .tar.gz files, use 'tar -xzf filename.tar.gz' to extract all contents.
iOS
- Install an app like iZip or WinZip from the App Store to handle .gz files.
Android
- Use a file manager app like ZArchiver or RAR that supports gzip extraction.
Security notes
- Always verify the source of a GZ file before opening it to avoid malicious content.
- Scan extracted files with antivirus software to ensure they are safe.
- Be cautious when handling GZ files from untrusted sources, as they can conceal harmful payloads.
Recommended antivirus software
Scan files before opening them. These antivirus tools help protect against malware and viruses.
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Can't open this file?
These are the most common causes and fixes when .GZ files fail to open.
Common reasons
- Decompressed file lacks extension
- Corrupted GZ file
Fix steps
- Use the 'file' command in Linux/macOS Terminal to check the file type.
- Open the file in a text editor to determine its format.
- Rename the file with the appropriate extension after identifying its type.
OS-specific troubleshooting
Convert .GZ to other formats
Use conversion tools to change .GZ files into formats your software supports.
What is a .GZ file?
Gzip is a file compression format that uses the DEFLATE algorithm to reduce file size. It is often used in conjunction with TAR to create compressed archives, known as .tar.gz or .tgz files.
Background
The GZ file format was developed by Jean-loup Gailly and Mark Adler as part of the GNU project. It is widely used for compressing single files and is a staple in Unix-based systems for reducing storage space and transmission times. The format is particularly popular for compressing TAR archives, which bundle multiple files into a single package before compression. This combination is often used for software distribution and backups. Gzip is known for its simplicity and efficiency, making it a preferred choice for many developers and system administrators.
Common MIME types: application/gzip
Known aliases: .tgz
Further reading
Authoritative resources for more details on the .GZ format.
Common .GZ issues
Decompressed file lacks extension
Sometimes the decompressed file does not have a recognizable extension, making it hard to identify.
- Use the 'file' command in Linux/macOS Terminal to check the file type.
- Open the file in a text editor to determine its format.
- Rename the file with the appropriate extension after identifying its type.
Corrupted GZ file
A GZ file may become corrupted during download or transfer, preventing decompression.
- Re-download the file from the original source.
- Check the file's checksum if available to ensure integrity.
- Try using a different decompression tool to extract the contents.
FAQ
Is .tgz different from .tar.gz?
No, .tgz is simply a shorthand for .tar.gz, both represent a TAR archive compressed with gzip.
Can a GZ file contain multiple files?
Not directly. To compress multiple files, they must first be combined into a single TAR archive, which can then be compressed into a GZ file.
What is the advantage of using GZ files?
GZ files significantly reduce file size, making them ideal for storage and transfer, especially in Unix-based systems.
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