Most websites offering “free registration codes” for free software are traps. They distribute fake keygens (key generators) that contain trojans, keyloggers, or cryptocurrency miners. Because IrfanView is so popular, scammers exploit the confusion around “registration” to infect users.
If you are a student or a non-profit organization, you may qualify for free registration. You can contact the developer directly through the official website to request a license. How to Enter Your IrfanView Registration Code irfanview registration code
Once you have purchased a license, you will receive a registration name and code. Here is how to activate it: Launch the IrfanView application. irfanview registration code