Quikbench
Quikbench
Extract the audio track from an MP4 video and save it as MP3 — right here in your browser tab. Nothing is uploaded — open your network tab if you don’t believe it.
Drop in one or more MP4 video files. Only the audio track is extracted and encoded to a high-quality 320kbps MP3 — no video is uploaded, stored, or produced.
Every tool on Quikbench follows the same rule: your files are read, converted, and turned into a download entirely inside this browser tab — nothing is ever uploaded to a server.
Extracts the audio track from an MP4 file and encodes it to MP3 entirely locally in your browser using the lamejs encoder — nothing is sent to a server, and the video itself is never touched or re-encoded.
Convert one file at a time, or queue several MP4 files and convert them all to MP3 in a single batch, with a zip download when you're done.
MP3 encoding runs entirely client-side at a solid 320kbps default, so you get a genuine, playable MP3 extracted straight from your video.
Pulling the audio out of an MP4 is useful for turning a recorded lecture, podcast video, interview, or music video into a lightweight, shareable MP3 — far smaller than the original video and playable on any music app or device. Note that some MP4 files use video/audio codec combinations your browser can’t decode; if a file fails, try re-exporting it with standard H.264/AAC encoding first.
This is a straightforward format conversion — it doesn't trim, normalize volume, or edit the audio in any way. If you need to cut a clip or adjust levels, do that in a dedicated audio editor before converting here. Need other formats too? The full Audio Converter handles MP3, WAV, M4A, MP4, AAC, OGG, and FLAC in one place.
Drop your MP4 file into the box above, wait a moment while it's read in your browser, then hit Convert and download the MP3 file. No account or install needed.
Just the audio. This tool reads the audio track out of your MP4 file and converts that — it doesn't touch or re-encode the video, and no video is produced as output.
No. The whole conversion, from reading the MP4 file to producing the MP3 download, happens locally in your browser tab using the Web Audio API. Nothing is sent to a server.
Yes, there's no cost, no account, and no watermark. Since conversion happens on your device, there are no server-side usage limits either.
It depends on the direction. Converting a lossy format (like MP3, MP4/AAC audio) to WAV doesn't recover any quality that was already lost — it just repackages the same audio uncompressed. Converting to MP3 applies lossy compression, so some quality is deliberately traded for a smaller file.
Yes — queue up to 20 files (300MB combined) and convert them all in a single batch, then download everything as one zip file.
Any modern browser with Web Audio API support — Chrome, Edge, Firefox, and Safari all work. If a specific file fails to decode, try a different browser, since audio/video codec support varies slightly between them.
📖 Related guide: Audio Formats Explained: MP3 vs WAV vs OGG · Need another format? Try the full Audio Converter.