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.

Text to speech Checking
Microphone STT Checking
Audio-file STT Checking
On-device STT Checking

STT

Speech to text

Checking browser support...
Uses your browser language by default. You can enter any BCP 47 language tag.
No audio file selected
Experimental in Chrome 135+. The file is played and transcribed in real time without being uploaded to ComUtil.
Advanced recognition options

TTS

Text to speech

Checking browser support...
1.0
1.0
1.0
Web Speech API plays synthesized speech through the device, but it does not expose the generated audio as a downloadable file.
What is the Web Speech API?

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.

How Speech Processing Works Here

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.

Useful Tests
  • 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
Frequently Asked Questions

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.