Windows: Press Win + R, type %appdata%.minecraft, and press Enter
Windows: Open File Explorer and go to C:UsersYourNameAppDataRoaming.minecraft
Mac: Open Finder, press Command + Shift + G, type ~/Library/Application Support/minecraft, and press Enter
Linux: Open your file manager and go to ~/.minecraft
Minecraft Launcher: Open the launcher, go to Installations, and open the game directory if available
If the folder is hidden, enable hidden files in your file manager