Speech to Text Beta
Transcribe recordings with Whisper. Timestamps and captions included.
How to speech to text
- Add an audio or video file — MP3, WAV, M4A, OGG, MP4, MOV and others are all accepted.
- Choose the model size. Base is the best starting point. The model downloads once and is cached.
- Select the output format — SRT or VTT if you need subtitles, TXT for a plain transcript.
About this tool
Whisper is OpenAI's open-source transcription model, released in 2022, and it shifted the field. Before it, accurate automatic transcription required either an expensive commercial API or a dedicated GPU. Whisper is small enough to run in a browser via WebAssembly, and the quality on clear speech is good enough to replace most manual transcription workflows.
The model comes in several sizes. Tiny (75 MB, roughly real-time on WASM) is sufficient for clear recordings in English. Base and Small are meaningfully more accurate and worth the extra seconds of first-load time for anything that matters. WebGPU acceleration — available in Chrome and Edge on most modern hardware — can reduce processing time to a fraction of real-time.
Because everything runs locally, the tool is appropriate for sensitive recordings: therapy sessions, legal depositions, confidential interviews, medical notes. The audio never leaves your machine. If you want to verify this, open your browser's Network tab before loading a file — you will see the model download once, and nothing else.