MP4 to MP3 Audio Extractor - Online Save Sound from Video

Simply upload your MP4 video file by dragging and dropping it onto the upload area or clicking to browse. Once loaded, you can optionally adjust the audio quality and time range, then click "Extract Audio". The tool processes everything locally in your browser — the audio is extracted in real-time, and you can preview it before downloading. No upload to any server is involved, ensuring complete privacy.

Yes, this tool is 100% free with no hidden costs. There are no limits on the number of conversions, no sign-up required, and no watermarks added to your audio. Everything runs directly in your browser using the Web Audio API and MediaRecorder technology, so we don't incur server costs for processing — and we pass that benefit on to you.

Absolutely! This tool is fully responsive and works on iOS and Android devices. You can upload videos from your phone's gallery, extract the audio, preview it, and download it — all from your mobile browser. We recommend using Safari on iOS and Chrome on Android for the best experience. The interface adapts seamlessly to smaller screens.

You can choose from 128 kbps, 192 kbps, 256 kbps, or 320 kbps audio bitrates. Higher bitrates deliver better sound quality but result in larger file sizes. For most use cases like podcasts, ringtones, or casual listening, 192 kbps offers an excellent balance. The output format is typically WebM audio (Opus codec) or M4A depending on your browser — both offer superior quality compared to traditional MP3 at equivalent bitrates.

Extraction happens in real-time — a 5-minute video takes approximately 5 minutes to process. For shorter clips (under 2 minutes), it's very fast. The tool shows a live progress bar with an estimated completion time. If you only need a portion of the audio, use the time range feature to extract just the segment you need, which dramatically reduces processing time.

Yes, completely. This tool operates entirely client-side — your video never leaves your device. No data is uploaded to any server. All processing is done locally in your browser using JavaScript APIs (AudioContext, MediaRecorder). You can even disconnect from the internet after loading the page and the tool will continue to work. Your privacy is 100% guaranteed.

While the tool is optimized for MP4 files, it also supports WebM, MOV, AVI, MKV, and most common video formats that your browser's video decoder can handle. The maximum file size is 500 MB. For best results, we recommend using H.264 encoded MP4 files with AAC audio, as these are most reliably processed across all browsers.

Yes! Use the Time Range settings to specify start and end times (in MM:SS or HH:MM:SS format). This is perfect for extracting a specific song from a video, a key quote from a lecture, or a sound bite from a clip. Only the specified segment will be processed and extracted, saving you time and storage space.

True MP3 encoding requires the LAME encoder, which isn't natively available in browsers. This tool uses MediaRecorder to capture audio, producing WebM (Opus) or M4A (AAC) files — both are modern, widely-supported formats that offer better audio quality than MP3 at equivalent bitrates. These files play on virtually all modern devices, media players, and audio software. If you specifically need MP3, you can use a secondary converter on the downloaded file.

The tool will detect if your video contains an audio track during processing. If no audio is found (the recording yields silence or negligible data), you'll receive a notification that the video may not have an audio track. Some screen recordings and time-lapse videos are created without audio — in these cases, there's nothing to extract. You can verify by playing the video in the preview player before extracting.