To turn off autocorrect or predictive text on WhatsApp, you need to disable the spell checker on your device settings.For iPhone users, open Settings, go to General, then Keyboard, and disable Auto-correction and Predictive Text toggles.For Android users, open the Gboard app, go to Text Correction, and disable Show Suggestion Strip, Next-word Suggestions, and Auto-Correction.This guide helps in deactivating autocorrect and predictive text features on WhatsApp for both iPhone and Android users.