Audio to text
Transcribe a recording, such as an interview, meeting, lecture, or voice memo, to text you can copy or download. Free, with no upload and no limit on length.
Drop a recording to turn its speech into text
The speech is recognized on your device, so nothing is uploaded and there's no limit on length.
MP3, M4A, WAV, FLAC, and other audio, or a video with sound.
How to convert audio to text
Open a recording in any common format and Mastershot writes down what's said, in paragraphs, with the time each one starts if you want it. Copy the transcript, or save it as a TXT file or as SRT or VTT subtitles. The speech is recognized in your browser, so the recording stays on your device and there are no minutes to buy.
Step 1
Choose a recordingPick an MP3, M4A, WAV, or other audio file.Step 2
Transcribe itThe speech is written down on your device.Step 3
Copy or downloadSave the transcript as TXT, SRT, or VTT.
What to expect
- Supported inputs
- MP3, M4A, WAV, AAC, OGG, FLAC, AIFF, and other recordings this browser can read, or a video whose speech you want.
- What happens
- Whisper, a speech recognition model, listens on your device and writes down each word with the time it's said. Paragraphs start where the talk pauses.
- Limits
- The first time, the browser downloads the 77 MB speech model and keeps it. Transcribing takes about a sixth of the recording's length, so an hour takes about 10 minutes. Clear speech comes out best; music, noise, and people talking over each other make more mistakes. It doesn't say who is speaking.
Private by design
Your video stays on your device
Mastershot processes your file locally in this browser. It does not need to be uploaded to a server, and you do not need an account to use the tool.
- No upload
- No signup
- No watermark