3 July 2026
MP4 to MP3: pulling the audio out of any video
Turn lectures, interviews, voice memos shot as video, or music sessions into audio files — and know when you want WAV instead of MP3.
A recorded lecture you want to listen to on a commute. An interview you need to transcribe. A jam session filmed on a phone where only the sound matters. Video files carry a full audio track — extracting it gives you something a tenth of the size that plays in any music app.
Extracting the audio
Video to MP3 takes MP4, MOV, MKV, WebM and friends, and hands back the soundtrack as an MP3. The audio is extracted and re-encoded, not re-recorded, so what you hear is what the camera captured.
MP3, or something else?
- MP3 — the default. Plays literally everywhere, small, and at 192kbps+ transparent for speech and casual music listening.
- WAV — uncompressed, huge, but lossless. Choose it (via Convert Audio) only if the audio is going into further editing or production, where each lossy re-encode adds damage.
- M4A/AAC — slightly better quality than MP3 at the same size; fine if your destination supports it (Apple ecosystem does).
For a voice lecture, MP3 at a modest bitrate is perfect: an hour lands around 40–60MB versus over a gigabyte of video.
If the goal is text, skip a step
If you're extracting audio just to transcribe it, go straight to Audio to Text — it accepts the audio and returns a transcript (including Bangla). Extract-then-transcribe manually only when you also want to keep the audio file.
One legal note
Extract audio from your own recordings, lectures you're permitted to keep, and content whose licence allows it. Ripping music from streaming platforms violates their terms — that's not what this tool is for.