How-to guide
How to extract audio from an MP4 video
MP4 is the container most iPhones, Androids, screen recorders and editing suites spit out by default, and its audio is usually AAC. VideoSplit demuxes the audio track without touching the video stream, so you get the cleanest possible copy with none of the re-encoding artefacts a generic converter introduces.
Nothing uploads. VideoSplit reads the file via the browser's File API, decodes the audio track locally with the Web Audio API, and hands you the result — the video itself never leaves your device.
Step-by-step
- Open VideoSplit.io. Open videosplit.io in Chrome, Safari, Firefox or Edge. No account, no install, nothing to sign up for.
- Drop your MP4 onto the page. Drag the .mp4 file anywhere on the hero zone or click Upload video. VideoSplit accepts MP4 files of any size your browser can hold in memory.
- Pick WAV or MP3. WAV gives you uncompressed 48 kHz audio — use it for a DAW or video editor. MP3 is a 320 kbps export, ideal for quick sharing.
- Download the file. Hit Download and the audio saves to your Downloads folder under the same base name as your video.
Tips for better results
- iPhone MP4 clips over 4 GB get split across files — process each part separately and stitch them in your DAW.
- If your MP4 uses AC-3 5.1 audio (common on DVD rips), VideoSplit downmixes to stereo on export.
- Hardware-encoded H.264 from action cams sometimes has audio and video in separate tracks; VideoSplit picks the first audio track automatically.
Free forever. No upload, no account.
Drop a video, get a WAV or MP3. Runs entirely in your browser — nothing uploads, nothing to install.
Try it free