Blocking online chat on Switch keeps kids safe from inappropriate conversations. Open the Parental Controls app or go to 'System Settings' > 'Parental Controls' on the console. Select 'Restrictions' > 'Communication Features'. Toggle off 'Online Communication'—this blocks all in-game chat, voice chat, and friend requests from strangers. For more control, enable 'Restrict Communication with Strangers' to let your child chat only with friends. Block specific games with heavy chat features: go to 'Manage Software' > 'Restrict Software' and select individual games to limit online access. The app lets you adjust settings remotely, so you can update restrictions even when away. Check the activity report to see if your child tried to access blocked chat features.