How browser speech recognition works
This tool uses the Web Speech API SpeechRecognition interface or webkitSpeechRecognition to turn microphone audio into text. The browser supplies the recognition engine.
Some browsers, including Chrome, may use a remote recognition service. A browser interface does not imply that audio stays on the device.
Starting, stopping, and selecting a language
Select a language, press the start button, and allow microphone access. The selector offers Japanese, English, Chinese, and Spanish; availability and accuracy depend on your browser’s recognition service.
Stop recognition with the stop button. The component also requests a stop when you leave the page.
Displaying and editing recognized text
Only results marked isFinal are appended to the text area. Interim result retrieval is enabled, but unfinished results are not displayed.
You can correct the text and copy it into another application. Speaker identification, automatic timestamps, and SRT or Markdown file export are not implemented.
Audio transmission and storage
The tool does not force on-device recognition. It cannot guarantee offline operation or that audio is never sent to an external service.
Check your browser and recognition provider’s policies for audio retention and use. Avoid entering confidential information. The text area has no automatic persistence, so copy important results before closing the page.
Accuracy and session limits
Continuous recognition is enabled, but silence, network loss, permission changes, or browser limits may end a session. Uninterrupted recording and error-free recognition are not guaranteed.
Reduce background noise, select the appropriate language, and test short phrases first. Review names, numbers, and technical terms before using the transcription.
Practical workflow and troubleshooting
Try a short, non-sensitive phrase, then stop recognition and check editing and copying. If microphone access was denied, check your browser permissions.
If the API is unavailable, use a supported browser. Stop input and check connectivity if network or recognition-service errors persist.