STT
Speech Playground
Try live speech recognition, transcribe a compatible audio-file track, and read text aloud with the voices installed in your browser or operating system.
TTS
Text to speech
The Web Speech API exposes speech recognition and speech synthesis features supplied by the browser or operating system. Available voices, languages, recognition quality, and offline support vary by device and browser.
This page passes microphone or compatible audio-track input directly to the browser's speech recognizer and sends text to the device speech synthesizer. ComUtil does not receive those inputs, but the browser may contact its own speech provider when on-device recognition is not selected.
- Check recognition support for a language or browser
- Draft text by speaking into a microphone
- Test installed voices, rate, pitch, and volume
- Try real-time transcription of a compatible audio file
Does ComUtil upload my audio or text?
No. The page has no upload endpoint for this tool. However, your browser or operating system may use an online speech service unless supported on-device recognition is explicitly enabled.
Why is audio-file transcription unavailable?
Passing an audio track into Web Speech recognition is a newer browser capability. Use a compatible Chromium browser such as Chrome 135 or newer, or use microphone recognition instead.
Can I download text-to-speech audio?
Not through the standard Web Speech API. It plays speech through the device but does not provide the generated audio bytes for download.