Extract audio from MP4 videos as MP3. Free online converter for music videos, podcasts & lectures. High quality, instant download.
Conversion settings — add a file to adjust
Upload your .mp4 file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .mp3 file when it's ready.
Extracting audio from video is a common need—you want the music without the visuals, the podcast without the video feed, or the lecture audio for offline listening. Our MP4 to MP3 converter strips the audio track from any video file and saves it as a universally playable MP3.
The conversion is fast because we're not processing video at all. We extract the existing audio stream, convert it to MP3 format if needed, and deliver a compact audio file. A 500MB video becomes a 10MB MP3 in seconds, perfect for music players, podcast apps, and offline listening.
What is an MP4 file? MP4 (MPEG-4 Part 14) is a container format, not a codec—think of it as a box that holds separate video, audio, subtitle, and metadata tracks in one file. The video track is usually H.264 or H.265 and the audio track is usually AAC. Because MP4 is the default output of phones, cameras, screen recorders, and video platforms, it's the file type you most often start with when all you actually want is the sound.
What is an MP3 file? MP3 (MPEG-1 Audio Layer III) is a pure audio format—no video track, no container overhead, just compressed sound. It uses perceptual coding to discard frequencies human hearing can't easily detect, which is how it shrinks audio to a tenth of its uncompressed size while still sounding good. Released in the 1990s, it remains the most universally compatible audio format ever made: every phone, car stereo, smart speaker, web browser, and operating system from the last 25 years plays MP3 without extra software. That universality—not technical superiority—is why MP3 is still the safest choice when you need audio that simply works everywhere.
Video files consume massive amounts of storage compared to audio. A 4-minute music video at 1080p might be 200MB, while the same song as MP3 is 4MB. When you only need the audio, why carry the visual baggage?
MP3 format works everywhere audio is played. Every phone, tablet, computer, car stereo, and smart speaker supports MP3. You can create playlists, add to music libraries, burn to CDs, or load onto portable players. The extracted audio integrates seamlessly with your existing audio collection.
The conversion is also valuable for accessibility. Converting video lectures to audio lets you listen while commuting or exercising. Podcast episodes published as video become portable audio files. Language learning videos become audio practice material.
Our converter extracts the audio stream from MP4 and encodes it as MP3 using the LAME encoder at 192kbps (default) or 320kbps (high quality). If the MP4 already contains MP3 audio, we can extract it directly without re-encoding—lossless extraction.
For MP4 files with AAC audio (most common), we transcode to MP3 with high-quality settings. The conversion preserves audio characteristics including stereo/mono, sample rate, and normalized volume levels.
Which bitrate should you choose? It depends on what's in the audio, and you can set it before uploading—the bitrate selector (64 to 320 kbps), VBR toggle, sample rate, and channel options are all in the settings panel, not hidden behind a post-upload screen. For music—concert recordings, music videos, DJ sets—use 256 or 320 kbps; music has wide frequency content and benefits from every extra bit. For podcasts, lectures, and interviews, 96 to 128 kbps is plenty: speech occupies a narrow frequency band, and most podcast networks distribute at exactly this range. For audiobooks and long voice memos where storage matters most, 64 to 96 kbps in mono halves the file again with no real loss for spoken word. When in doubt, enable VBR (variable bitrate): the encoder spends more bits on complex passages and fewer on silence, giving better quality per megabyte than any fixed setting.
One honest caveat: bitrate can't add quality that isn't in the source. Most web video carries 128kbps AAC audio—re-encoding it at 320kbps produces a bigger file, not a better-sounding one. Match the output to the source: extracting from a screen recording or webinar? 128kbps is already transparent. Extracting from a high-bitrate camera file or studio export? That's when 256-320kbps pays off.
MP3 encoding at 192kbps provides excellent quality for most content—indistinguishable from the original for speech and most music. Select 320kbps for audiophile-quality extraction from high-bitrate sources. For lossless needs, consider our MP4 to FLAC converter.
| Device | MP4 | MP3 |
|---|---|---|
| Windows | Native | Native |
| macOS | Native | Native |
| iOS | Native | Native |
| Android | Native | Native |
| Linux | Native | Native |
| ChromeOS | Native |
| Speed | Instant — the audio is extracted, not re-encoded, so a 3 MB clip finishes in under a second. |
| Output size | Audio only — typically 1–5% of the source file (a 3.2 MB video became a 46 KB MP3). |
| Quality | Source audio bitrate preserved up to 320 kbps; no video re-encode means no added artifacts. |
| Engine | FFmpeg, server-side. |
Measured on our servers, June 2026, on a 10-second 1280×720 H.264 clip.
Stop wasting storage on video when you only need audio. Our MP4 to MP3 converter extracts high-quality audio in seconds, creating compact files that play on every device. Free, fast, and foolproof.
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| Native |
Enhver browser, enhver enhed
| Funktion | MP4 | MP3 |
|---|---|---|
| Fulde navn | MPEG-4 Part 14 | MPEG Audio Layer III |
| Filendelse | .mp4 | .mp3 |
| Bedst til | Universal compatibility | Universal compatibility |