Free Online Speech to Text Converter | Transcribe Audio to Text Instantly in Your Browser

Yes. You can use all features with no sign-up, no watermarks, and no hidden fees.

It depends on the engine you choose:

• Web Speech API → Uses your browser’s built-in service (Google, Apple, or Microsoft). This is cloud-based, so audio may be sent to their servers.
• Local Whisper, ONNX, Vosk, or Coqui engines → Run fully inside your browser with WebAssembly or WebGPU. Your audio never leaves your device.

This is what makes our tool different from Azure, AWS, or Google Cloud STT — we don’t upload your recordings by default.

Many online converters send your recordings to cloud services like Azure, AWS, or Google Cloud. While accurate, they require uploading your audio, which raises privacy and compliance concerns.

Our converter focuses on in-browser recognition using open-source models like Whisper, ONNX, Vosk, and Coqui. This way, your audio is processed locally — private, fast, and safe.

If you want a cloud engine, you can select the Web Speech API (built into Chrome, Edge, Safari). Otherwise, nothing leaves your device.

• Web Speech API (cloud) → High accuracy, especially for major languages.
• Whisper local models → Very strong accuracy and multilingual support. Larger models are more accurate but load slower.
• ONNX Whisper → Runs Whisper via ONNX in the browser with WebGPU acceleration. Similar accuracy to Whisper.cpp, often faster on supported GPUs.
• Vosk local models → Lightweight and good for streaming; slightly less accurate than Whisper.
• Coqui STT (DeepSpeech fork) → Smaller language coverage; fine for English and some others, but generally below Whisper on long/noisy speech.

For best results, use a clear microphone and minimize background noise.

• Model size → Larger Whisper models can be 100 MB+ and take time to load. Prefer Tiny/Base for fast startup.
• Performance → Speed/accuracy depend on your device. WebGPU is much faster than pure WebAssembly.
• Language coverage → Whisper ≈100 languages; Vosk ≈20; Coqui ≈10; Web Speech API varies by vendor.
• Session length → Very long recordings may need chunking or splitting for stability.
• Mobile limits → Older/low-memory phones may struggle with large models.

Unlike cloud services, there are no account quotas — your limits are device performance and browser memory.

No artificial limits. Everything runs in your browser, so there are no per-minute caps or quotas. Practical limits are device-based:

• Memory → Very long files plus large models can exhaust RAM; split into 5–30 minute chunks for best results.
• Speed → Long audio may process slowly on low-power devices; WebGPU helps a lot.
• Browser behavior → Some browsers throttle long-running tabs in the background.

Live mic sessions can run continuously while the tab remains active; uploaded files work best when chunked.

Yes. You can upload audio files (MP3, WAV, M4A, WebM) and the tool will convert them to text. Files are processed in-browser — they’re never uploaded to a server.

Yes. You can export in multiple formats:

• TXT (plain text)
• SRT (video subtitles)
• VTT (web captions)
• CSV / JSON (structured data for developers)
• DOCX / PDF (with optional libraries)

• Web Speech API → Dozens of languages depending on your browser vendor.
• Whisper (local) → ~100 languages with strong accuracy.
• ONNX Whisper → Same coverage as Whisper (~100), optimized for WebGPU.
• Vosk (local) → ~20+ languages (separate models per language).
• Coqui STT → Mainly English and a few others.

Not yet — this tool focuses on speech → text. For the opposite (text → voice), browsers support the Web Speech Synthesis API, but that’s a separate feature. Our priority here is privacy-safe transcription.