🎤 Speech-to-text conversion

Converts voice from the microphone into text in real time using the browser's Web Speech API. Supports multiple languages including Japanese and English. No data is sent to the server.

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Usage and Application Examples

  • Transcribe audio from meetings and interviews in real time
  • Quickly text notes and ideas by voice
  • Foreign language pronunciation practice - check for correct recognition
  • Efficiently performs long text entry without a keyboard

What is Speech-to-Text?

Speech-to-Text leverages your browser's Web Speech API—built-in speech recognition technology—to convert spoken words into written text in real-time. You speak, and your words appear on screen as though you're dictating to a transcription assistant. The tool supports 50+ languages including English, Japanese, Spanish, Mandarin, and more, making it invaluable for multilingual users. No external services required; processing happens locally in your browser, protecting privacy while eliminating cloud upload delays. This accessibility feature benefits users with mobility limitations, accessibility needs, and anyone wanting faster text input than typing.

How to Use

Select your language from the dropdown menu matching your intended speech language. Click the microphone button to start listening. Speak clearly into your device's microphone—the tool transcribes your words in real-time, displaying text in the input field. Pause briefly between sentences to allow accurate punctuation. The status indicator shows whether the tool is actively listening, processing, or idle. Click the stop button when finished. The converted text is immediately available for copying, editing, or further processing. The tool handles accents and colloquialisms reasonably well, though technical jargon and proper nouns require manual correction. Works on desktops, tablets, and smartphones with microphone hardware.

Use Cases

Students transcribe lecture notes hands-free while focusing on understanding rather than typing. Researchers document field observations without interrupting workflow: botanists describing specimens, journalists recording interviews, archaeologists noting excavation details. Writers overcome typing fatigue by dictating first drafts, accelerating creative flow. Non-native speakers practice pronunciation by comparing spoken input to text output, identifying accent patterns. Users with RSI (repetitive strain injury) or arthritis avoid keyboard strain. Content creators rapidly generate bulk text for videos, social media, or documentation. Accessibility features empower users with motor disabilities to independently interact with web applications. Multilingual users quickly translate spoken thoughts by changing language settings mid-session.

Tips & Insights

Web Speech API accuracy varies by browser and operating system—Chrome/Edge typically outperform Firefox. Background noise significantly impacts accuracy; quiet environments yield 95%+ accuracy while noisy spaces drop to 70-80%. The API performs best with deliberate, clear speech at natural conversational pace—rushed mumbling or overly formal enunciation reduces accuracy. It struggles with homophones (to/too/two) and requires context to resolve ambiguity. Punctuation recognition varies; speaking "period" or "comma" explicitly helps but feels unnatural. The technology handles continuous speech better than isolated words. Local processing means no recordings sent to cloud servers—privacy-focused users appreciate this advantage over centralized transcription services.

Frequently Asked Questions

What is the Web Speech API?

Web Speech API is a speech recognition function built into the browser that converts speech from the microphone into text in real time. No registration with an external service or API key is required.

Which browsers are available?

Works most stably in Google Chrome (desktop and Android); also available in Microsoft Edge; some limitations may exist in Safari and Firefox.

What languages are supported?

We support many languages including Japanese, English, Chinese, Korean, French, German, Spanish, Portuguese, Italian, Russian, Arabic, and Hindi.

Is audio data sent to the server?

The tool itself does not send data to servers. However, data may be sent to servers such as Google for speech recognition processing inside the browser's Web Speech API. Please be careful with sensitive content.

What is continuous recognition mode?

When continuous recognition mode is on, recognition continues automatically after a sentence is finished. When off, recognition stops at the end of an utterance. Continuous recognition mode is useful for transcribing long sentences.

How can I improve recognition accuracy?

Use in a quiet environment and speak clearly and close to the microphone for better accuracy. Also, an external microphone may provide higher accuracy than the built-in microphone. Also make sure that the recognition language setting is correct.

Do I need to grant microphone permissions?

Yes, your browser will request microphone access when you first use the tool. You must allow this permission in the browser prompt for speech recognition to function, and denying it will prevent the tool from operating.

How does the tool handle punctuation?

Punctuation is typically added automatically by the speech recognition engine if you speak naturally with pauses and tone changes. For precise punctuation, you can also manually edit the text after recognition or use voice commands like "period" or "comma."

Will background noise affect accuracy?

Background noise can significantly reduce accuracy, especially loud or constant noise like traffic or music. For best results, use the tool in a quiet environment with a close microphone placement and clear, distinct speech.

Can I use this tool offline?

Speech-to-text requires an internet connection because the Web Speech API typically relies on cloud processing through your browser. Some browsers may offer limited offline dictation, but full functionality requires an active connection.

How do I switch between languages during a session?

Select your desired language from the language dropdown before starting recognition. If you need to switch languages mid-session, stop the current session, change the language setting, and start a new recognition session.

Can I export or save my transcribed text?

You can copy the transcribed text directly from the text box to your clipboard, then paste it into documents, emails, or other applications. The tool doesn't have a built-in save feature, but the text remains editable on the page until you refresh your browser.