MP4 to MP3: Extract Audio From Any Video Free

A recorded lecture you want to listen to on a run. An interview you need to transcribe. A DJ set where only the sound matters. In all of these the video pixels are dead weight — what you want is the audio track, and extracting it is a five-second job.

Extract MP3 from a video

1. Open the KONVERTER audio extractor.
2. Drop in your video — MP4, MOV, WEBM, MKV and friends all work.
3. The audio track is pulled and encoded to MP3 (processing runs as a background job, so big files are fine).
4. Download your MP3 — typically 5–10% of the video's size.

Bitrate: what actually matters

• 128 kbps — fine for voice: lectures, interviews, podcasts.
• 192 kbps — the sweet spot for most music.
• 320 kbps — maximum MP3 quality; only worth it if the source video had high-quality audio to begin with.
• Extraction can't add quality. If the video's audio was 128 kbps, encoding at 320 kbps just makes a bigger file.

Legal note

Extract audio from content you own or have rights to use — your own recordings, licensed material, public-domain media. Ripping copyrighted music you don't own remains copyright infringement regardless of the tool.

Next steps

Need text instead of audio? Run the extracted file through an AI transcription tool and get a timestamped transcript. Need a snippet? Trim the audio to the section you want before sharing — both take under a minute.