v151 · Web API · Speech
Quality Control Panel
Two simultaneous SpeechRecognition sessions — left has unspokenPunctuation: true, right has it false. Both hear the same microphone input. The diff panel below counts auto-inserted punctuation marks, compares word counts, and shows a character-level difference.
Microphone required — Chrome 151+ with microphone permission. Simulation mode shows a side-by-side diff without live audio when the API is absent or permission is denied.
unspokenPunctuation: true
Start speaking to fill this panel…
Words: 0
Punct: 0
Chars: 0
unspokenPunctuation: false
Start speaking to fill this panel…
Words: 0
Punct: 0
Chars: 0
Diff analysis
Speak and stop to see the diff.
implementation reference
Need the exact API surface, compatibility boundaries, errors, lifecycle, and source links? Read the matching gendn reference ↗