Round your lips into a tight circle. Lift the back of your tongue toward the soft palate and add voice.

Americans pronounce witty as WIH-tee (/ˈwɪɾi/). In "witty", the "t" between vowels sounds like a quick "d" — the tongue briefly taps the ridge behind the upper teeth. This is called the Flap T, and it's why Americans sound more relaxed than the textbook. It comes out as WIH·tee. Stress falls on the first syllable — keep everything else short and quick. You'll hear it in sentences like "I found the dialogue to be witty and very well written".
Record yourself saying "witty" and play it back. The mic stays on your device — nothing's uploaded.
2 syllables, 4 sounds. Tap a syllable to jump to its row, then explore each sound's mouth shape and how it's made.
The textbook way isn't wrong — it's just not how anyone actually says it.
In "witty", the "t" between vowels sounds like a quick "d" — the tongue briefly taps the ridge behind the upper teeth. /t/ or /d/ becomes a quick tap [ɾ] — sounds like a soft D. The tongue briefly taps the ridge behind the upper teeth.
Stress falls on the first syllable, not the others. Stretch WIH — keep everything else short and quick.