MP4 to MP3 Converter
Extract audio from MP4, WebM, or MOV. Choose bitrate up to 320 kbps — no uploads.
Best for extracting a podcast, lecture, or music track from a video file.
Drop files here
or click to browse · paste from clipboard
Accepts .MP4, .WEBM, .MOV · Up to 1,000 files
How it works
Drop your files
Drag and drop, click to browse, or paste from clipboard. Up to 1,000 files at once.
Choose settings
Adjust quality, format, and other options to match your needs.
Click Convert
Everything runs in your browser via WebAssembly. MP4 to MP3 Converter happens locally — no server involved.
Download
Download files individually or grab all at once as a ZIP.
Frequently asked questions
Yes, but at 128 kbps and above, the difference is inaudible for most listeners on most speakers and headphones. MP3 is a lossy format — it discards audio data the ear typically cannot hear. At 128 kbps, speech and podcasts are indistinguishable from the original. For music, 192–256 kbps is where most people stop hearing a difference. Use 320 kbps if you plan to re-edit the audio later, since re-encoding a lossy file degrades quality.
MP3 files are almost always much smaller than the source MP4 — video makes up most of the file size. A rough estimate: a 128 kbps MP3 uses about 1 MB per minute of audio. So a 30-minute video that was 500 MB as an MP4 might produce a 4 MB MP3. Actual results depend on the bitrate you choose and the original audio track.
Video conversion requires decoding a video container, extracting the audio stream, and re-encoding it as MP3 — all using a full media-processing engine (ffmpeg.wasm) that runs in your browser. That engine is about 25 MB and takes a moment to load on first use. After that, it is cached and subsequent conversions start immediately. Audio extraction itself is real-time or faster for most files.
Yes. This tool accepts MP4, WebM, and MOV — the three most common video formats. Drop any of them and the audio track will be extracted and saved as MP3. The video stream is discarded entirely.
If the video has no audio track (muted screen recording, silent clip), the conversion will produce an empty or near-empty MP3. Videos over 500 MB can also be slow to process in the browser — for very long files, expect several minutes of processing time. If you get a corrupt output, the source file may have an unusual audio codec that ffmpeg.wasm cannot decode.
No. Conversion runs entirely in your browser using ffmpeg.wasm — your video files never leave your device. ConvertYard's servers only deliver the tool code. They never see your files, filenames, or audio content.