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Tongue Twister Trial
SpeechSay "she sells seashells" as fast as you can — the on-device recognizer scores how much of it survived.
Why On-Device?
A pronunciation game with zero backend: every attempt is transcribed and scored locally, so you can embarrass yourself in complete privacy.
Interactive Demo
Web Speech (on-device): Loading...
"She sells seashells by the seashore."
Tap and say it as fast as you dare. Scored on-device, judged mercilessly.
Implementation Code
demo.js
Keep exploring
56 demos, all running on-device.
Speak to Fill
Say "table for four next Friday at seven, outside" and watch the booking form fill itself — speech in, structured data out.
Web Speech Prompt API
ASR Quality Tier Lab
Read the same passage against the command, dictation, and conversation models — then compare accuracy and latency.
Web Speech
Jargon Dictation
Dictate product names the recognizer has never heard — then boost them with contextual biasing and watch the diff.
Web Speech