How can I untar or unzip tar.gz file on windows 11?

I won't recommend using 7Zip for unzipping .tar.gz file on Windows 11 or Windows 10.

1. Relatively complex operation
For newbies who are not familiar with computer operation, using 7Zip to decompress .tar.gz files may require some learning costs. Because .tar.gz is compressed in two layers, you have to decompress the .gz layer first to get the .tar file, and then decompress the .tar file to get the final content. If the operation is not skillful, there may be mishandling in the process, such as decompressing to the wrong folder and so on.

2. The interface is not user-friendly enough
7Zip's interface is relatively simple and lacks some modern interactive design. For users who are used to graphical operation and are looking for a simple and intuitive interface, it may not be as user-friendly as some decompression tools or third-party commercial software that are integrated into the system.

3. Performance issues
When working with very large .tar.gz files, 7Zip may experience performance bottlenecks and slow decompression speeds. This may be especially true if the computer hardware configuration is low.

Honestly, the paid apps are much more easier to untar tar.gz files on Windows. It is recommended testing the solution out by yourself.