LipSyncSmith Pro

LipSyncSmith Pro is the full lip sync timing tool for game developers who want dialogue that fits both the mouth and the timeline.

Import your voice audio and see the real waveform. Auto-detect speech segments with energy + zero-crossing analysis on real decoded PCM, estimate visemes (mouth shapes) with an honest heuristic, and check dialogue timing against real subtitle standards — reading speed, minimum duration, and overlaps. Preview everything karaoke-style, then export timing JSON, SRT, and VTT straight into your engine or video pipeline.

Pro removes every demo limit: unlimited dialogue lines, multiple audio files, and fully unlocked exports.

Everything runs locally in your browser and works fully offline. One single HTML file — no installs, no accounts. One-time purchase of $9.99 — yours forever.

New to LipSyncSmith? Try the free demo first: https://theluckyduck666.itch.io/lipsyncsmith