What is a .H3 file?
An .H3 file is a special type of file used with Nintendo Wii U games. It's like a digital fingerprint for a game's data file, which is called an .APP file. This fingerprint is made using a method called SHA-1, which helps make sure the game data hasn't been tampered with or damaged. It's a way for the Wii U game console or a computer program that acts like a Wii U (an emulator like Cemu) to check that the game files are correct and safe to use. Normally, you as a game player won't need to open or change this .H3 file.
The main program that can work with an .H3 file is called Cemu, which is an emulator that lets you play Wii U games on a computer. You might come across an .H3 file if you buy a Wii U game online through the Nintendo eShop and download it to your console. Another way you might find an .H3 file is if you use a special tool to copy a game from a physical disc onto your computer, a process known as "dumping." When you do this, the .H3 file will be in a folder with the game's .APP file and other files related to the Wii U game, like .TMD, .TIK, and .CERT files. These files all work together to make sure the game runs properly on your Wii U console or on a computer using an emulator.
Verification
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