I am running Minecraft forge 1.14.4 with lots of mods. There are some mods that I want to use as-well that are 1.12.2. I was wondering if I could update the mod / or convert the mod into 1.14.4. Like by using software or editing the mod file? - Dose anyone Know anything about this?
No. If this was possible, it would save thousands of hours of work for mod developers, who usually need to put in considerable effort to update their mods to new releases.
Mods change parts of the existing Minecraft code. To be able to do that, they need to know what code even to change. Especially from 1.12 to 1.13 a lot of code was changed, so very often you wouldn't even find the same Vanilla code anymore that the mod modifies.
Mods also often need special changes for new versions, for example if a 1.8 mod adds hats, it needs to move them downwards and rotate them when flying with elytra in 1.9+. No automatic converter could consider all these cases.