v150 · Web API · Speech
Device Capability Probe
Check what speech recognition capabilities your current browser and device expose for a specific BCP 47 language. The probe inspects SpeechRecognition, SpeechRecognition.available() with the quality option, local language-pack status, the instance quality property, microphone readiness, and a brief start/abort trial for each quality tier.
The trial creates a SpeechRecognition session, applies the selected local/offline mode when exposed, calls start(), then aborts shortly after onstart or reports the browser error. It intentionally does not upload or store audio.
// Click "Run Capability Probe" to inspect this device…
| Probe | Result | Notes |
|---|---|---|
| Run the probe to see results… | ||
see also
- Quality Config Panel — build and copy recognition config code
- Quality Level Explorer — try different quality tiers live
- Command vs. Dictation — side-by-side comparison
- ChromeStatus feature 5136859632107520
- Web Speech API: available(options)
- Chrome 150 beta: on-device recognition quality
implementation reference
Need the exact API surface, compatibility boundaries, errors, lifecycle, and source links? Read the matching gendn reference ↗