IPSW Editor Free is a Windows-based tool that supports a wide range of iOS devices, including iPhones, iPads, and iPod touches. The tool is designed to be user-friendly, with a simple and intuitive interface that makes it easy to navigate and edit IPSW files.

Once you extract the DMG from the IPSW, you need to mount it.

While many paid "all-in-one" repair tools exist, these free and open-source options are the gold standard for editing and research:

A comprehensive, open-source command-line "Swiss Army Knife" for iOS research. It allows you to download, parse, and analyze Apple firmware on macOS, Linux, and Windows.