Is this transcription really free and unlimited?

Yes. The AI runs on your own device, so we have no per-minute server costs — which is why services like Otter and Rev charge and we don't.

Is my audio uploaded to a server?

No. The Whisper AI model runs inside your browser. Your recordings never leave your device — suitable for confidential interviews, legal and medical audio.

Which languages are supported?

Whisper supports 90+ languages including English, Hindi, Spanish, Portuguese, French, German, Arabic, Japanese and Chinese. Use auto-detect or pick a language.

It uses OpenAI's Whisper — the same family of models behind most paid transcription services. Choose the Accurate model for best results; clear audio transcribes very well.

What file types work?

MP3, WAV, M4A, OGG, FLAC and most video files (MP4, WebM, MOV) — the audio track is extracted automatically.

Transcribe Audio to Text Free — AI, No Upload, Unlimited

Free transcription with no catch — here's why

Transcription services charge $10–30/month because they run expensive GPU servers to process your audio. Convert.AI runs OpenAI's Whisper model inside your browser using WebAssembly. No servers = no per-minute costs = genuinely free and unlimited. The model downloads once (40–250MB depending on quality) and is cached for instant reuse.

How it compares

	Convert.AI	Otter.ai	Rev
Price	Free, unlimited	$17/month	$0.25/minute
Audio uploaded	Never	Yes	Yes
Works offline	Yes (after model cached)	No	No
Signup	None	Required	Required
Languages	90+	English-focused	Multiple

Built for confidential audio

Because nothing is uploaded, this is one of the few transcription tools appropriate for audio you legally or ethically cannot share with a third-party server:

Legal: client calls, depositions, privileged recordings
Medical: dictation and session notes (no third-party processor involved)
Journalism: source interviews stay on your machine
Business: internal meetings, unreleased product discussions

Tips for best results

Choose the Accurate model for interviews and anything important
Setting the language explicitly beats auto-detect for non-English audio
Long recordings: a laptop transcribes roughly in real-time or faster; keep the tab open
Video files work — the audio track is extracted automatically

Related: MP4 to MP3 · WAV to MP3 · video converter