MP4 to MP3 Converter
Convert MP4 to MP3 online for free. The conversion runs right in your browser, so your videos are never uploaded anywhere.
- No upload
- No sign-up
- Up to 320 kbps
- Batch conversion
Files are converted on your device. Nothing is uploaded.
How to convert MP4 to MP3
Use this MP4 to MP3 converter online in three steps. There is no software to install and no account to create.
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Choose your video
Click Choose files or drag one or more videos onto the page.
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Pick the MP3 quality
192 kbps suits most videos. Use 320 kbps for music, or 128 kbps for smaller spoken-word files.
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Download the MP3
Conversion starts automatically. When it finishes, click Download MP3.
Why use this free MP4 to MP3 converter?
Private by design
Your video is processed on your own device with FFmpeg. It is never uploaded, stored, or seen by anyone.
No upload wait
Skip uploading a big video file. Only the audio is extracted and encoded, so long videos convert quickly.
Large files welcome
There is no upload size limit. Videos are read in small pieces, so even gigabyte-sized MP4 files work on a computer.
Choose your bitrate
Save MP3 files at 128, 192, 256 or 320 kbps, and keep the original title tags from your video.
Batch conversion
Add several videos at once. Each one is converted in turn and gets its own download button.
Works everywhere
Use it in Chrome, Edge, Firefox or Safari on Windows, Mac, Linux, ChromeOS, Android or iPhone.
Other video formats you can convert to MP3
MP4 is the most common format, but the converter extracts MP3 audio from almost any video file, as long as it has a sound track. For trimming, more formats and step-by-step help on every device, see the Video to MP3 converter.
| Conversion | Typical source |
|---|---|
| MP4 to MP3 | Phone recordings, downloaded videos, screen recordings, editing software exports |
| MOV to MP3 | iPhone and Mac videos, QuickTime recordings |
| MKV to MP3 | Movies, series and other high-quality video files |
| WEBM to MP3 | Browser recordings and web videos |
| AVI to MP3 | Older cameras and Windows video files |
| WMV to MP3 | Windows Media videos |
| M4V, FLV, 3GP, MPG, VOB, TS, MTS to MP3 | iTunes videos, Flash video, older phones, DVDs and camcorders |
Which MP3 bitrate should you choose?
A higher bitrate keeps more detail but makes the file larger. File sizes are per minute of audio.
| Bitrate | Best for | Size per minute |
|---|---|---|
| 128 kbps | Speech, lectures, podcasts and voice notes | about 0.96 MB |
| 192 kbps | Most videos and music (recommended) | about 1.44 MB |
| 256 kbps | High-quality music | about 1.92 MB |
| 320 kbps | The best quality MP3 allows | about 2.4 MB |
MP4 vs MP3: what is the difference?
MP4 is a container format. It usually holds a video track, one or more audio tracks (typically AAC), and sometimes subtitles. MP3 is an audio-only format that plays on virtually every phone, car stereo, music player and computer.
Converting MP4 to audio keeps the sound and drops the picture. That makes the file far smaller and easier to listen to on the go, whether it is a lecture, an interview, a podcast recorded on video, or the soundtrack of a clip.
Need the words, not just the audio?
Turn your MP3 into an accurate transcript with timestamps and speaker labels, then export TXT or SRT subtitles. After converting, click Transcribe to text next to your file.
MP4 to MP3 FAQ
How do I convert MP4 to MP3 for free?
Choose or drag your MP4 file into the converter on this page, pick an MP3 quality, and the conversion starts right away. When it finishes, click Download MP3. It is completely free, with no sign-up and no daily limit.
How do I extract the audio from an MP4?
Choose the MP4 in the converter on this page. It pulls out the audio track and saves it as an MP3, the most widely supported audio format, right in your browser. It is the quickest way to convert MP4 to audio without installing any software.
Are my MP4 files uploaded to a server?
No. The converter runs entirely in your browser using FFmpeg compiled to WebAssembly, so your video is read and converted on your own device and is never sent to our servers. Only the converter engine itself is downloaded, once.
Is there a file size limit?
There is no upload limit because nothing is uploaded. The practical limit is your device's memory: on a computer, large videos of a gigabyte or more usually convert fine, while phones and tablets work best with smaller files.
Does converting MP4 to MP3 reduce audio quality?
The audio inside most MP4 files is AAC, so it is re-encoded as MP3. At 192 kbps or higher the difference is very hard to hear, and 320 kbps is the best choice for music. Converting cannot add quality that the original video did not have.
Can I convert MP4 to MP3 on iPhone or Android?
Yes. Open this page in Safari on iPhone or iPad, or in Chrome on Android, choose a video, and download the MP3 when it is ready. On iPhone and iPad the MP3 is saved to the Downloads folder in the Files app.
How do I convert MP4 to MP3 on Windows or Mac?
Use this page in any current browser such as Chrome, Edge, Firefox or Safari. There is no software to install, and it works the same way on Windows, macOS, Linux and ChromeOS.
Can I convert several MP4 files to MP3 at once?
Yes. Select or drop several videos together. They are converted one after another, and each MP3 gets its own download button.
Which other video formats can I convert to MP3?
Besides MP4, you can convert MOV, M4V, MKV, WEBM, AVI, WMV, FLV, 3GP, MPG/MPEG, VOB, TS, MTS, M2TS and OGV files to MP3, as long as the video has an audio track.
Why does the first conversion take longer?
The first time you convert, your browser downloads the converter engine (about 9 MB). It is cached afterwards, so later conversions start almost instantly.
How can I turn my MP4 or MP3 into text?
After converting, click Transcribe to text to send the MP3 to TranscribeText's AI transcription. You get an accurate transcript with timestamps that you can export as TXT or SRT subtitles.
Conversion is powered by FFmpeg via ffmpeg.wasm, running locally in your browser.