MP4 to MP3
Extract audio from video files and convert to MP3. Works with MP4, MOV, AVI, MKV, and WebM. Free and private.
Options
So funktioniert es
Upload your video file — MP4, MOV, AVI, MKV, or WebM
Choose audio quality — 192 kbps is recommended for most uses
Download your MP3 — audio extracted and converted in your browser
Häufig gestellte Fragen
What video formats are supported?
MP4, MOV, AVI, MKV, WebM, and M4V are all supported. The audio track is extracted and converted to MP3 regardless of the video format.
How long does conversion take?
Conversion typically takes 5–30 seconds depending on video length and your device. The first use downloads a ~25 MB audio processing engine which is then cached.
Will quality be lost?
The 192 kbps setting preserves near-CD quality audio. Choose 320 kbps for the highest quality or 128 kbps for smaller file size.
Is my video uploaded anywhere?
No. All processing happens locally in your browser using WebAssembly. Your video never leaves your device.
Can I extract audio from a video on my phone?
Yes. OneConvertly works in modern mobile browsers. However, large video files may be slow on older phones due to limited RAM and processing power.
Is there a file size or duration limit?
Files up to 500MB are supported. There is no duration limit, but longer videos take more time since conversion runs locally on your device.
Is this tool completely free?
Yes. No signup, no watermarks, no daily caps. Extract audio from as many videos as you need.