To convert an MP3 to text on a Mac, drop the file onto an on-device transcription app and it returns timestamped text in minutes — no upload and no conversion service. TranscribeAnything handles MP3, WAV, M4A, AIFF, FLAC and more, transcribes an hour of audio in about a minute at up to 80× realtime, and runs entirely on your Mac. Your first 5 files (up to 30 minutes each) are free.
MP3 is the common one, but the same drag-and-drop works for WAV, M4A (Apple's default for voice memos and recordings), AIFF, FLAC, and the audio track of MP4 or MOV video. You don't convert anything first — the app reads the file directly.
And there's no per-file charge or minute meter. TranscribeAnything runs Apple's on-device speech engine at up to 80× realtime, supports 10 languages, and costs $19.99/year for unlimited transcription — the first 5 transcriptions (up to 30 minutes each) are free.
Free 'MP3 to text' websites upload your audio to their servers, cap the length, watermark the output, or all three — and your recording ends up on infrastructure you don't control. Converting on your Mac has none of those catches: no upload, no length cap on a paid license, no watermark, and it works with the Wi-Fi off. The audio stays exactly where it already was.