To extract audio from a video, open it in a converter that reads the video’s sound track and saves it on its own, usually as an MP3. The quickest free way is our video to MP3 converter: choose the video, pick MP3, M4A or WAV, and download the file a few seconds later. It runs in your browser, so the video is never uploaded. This guide explains which format to pick, what bitrate you really need, and how to keep only part of a video, for a ringtone or one song from a concert clip.
What “extracting audio” actually does
A video file such as an MP4 or MOV is a container holding two separate streams: the picture and the sound. Extracting the audio means keeping the sound stream and dropping the picture. That is why it is fast: there is no video to re-encode.
The sound inside phone videos is almost always AAC, the same format used by Apple Music and most streaming. You can either copy that AAC sound out unchanged (saved as an .m4a file), or re-encode it to MP3, which every device and app on earth will play.
MP3, M4A or WAV: which one to choose
| Format | Size per minute (stereo) | Quality | Pick it when |
|---|---|---|---|
| MP3 128 kbps | About 1 MB | Fine for speech | Lectures, interviews, voice notes, podcasts |
| MP3 192 kbps | About 1.4 MB | Sounds like the original to most people | Music and general use. The safe default |
| MP3 320 kbps | About 2.3 MB | The best MP3 gets | Music you care about, on good headphones |
| M4A (AAC copy) | Same as the video’s sound | Identical to the video | Phone videos, when the device you’ll play it on supports M4A (iPhone, Android, most PCs do) |
| WAV | About 10 MB | Uncompressed | Editing in Audacity, GarageBand or a DAW |
Two rules help. First, a higher bitrate can’t add quality that wasn’t there. If the video’s own sound is 128 kbps AAC, saving it as a 320 kbps MP3 only makes a bigger file. Second, each lossy conversion throws away a little detail. One step from AAC to MP3 at 192 kbps is not audible to most people, but if you need the exact original, copy it as M4A instead.
How to extract audio from a video in your browser
- Open the video to MP3 tool and choose your video, or drop it on the box. MP4, MOV, WebM, MKV and most phone and screen recordings work. Audio files such as M4A, WAV or OGG work too, if you just need an MP3.
- The tool shows the length and what kind of sound the file has, for example “0:42 · AAC sound, stereo”.
- Pick MP3, M4A or WAV. For MP3, leave quality on 192 kbps unless it is only speech (128) or music you love (320).
- If you only need part of it, type a Start and End time, such as 0:30 and 1:00.
- Press Convert, listen to the preview, and press Download.
Everything runs on your phone or computer. The MP3 encoder is a WebAssembly build of LAME, the open-source encoder used by desktop apps for over twenty years, so the files are standard MP3s that play anywhere. It works in current Chrome, Edge, Samsung Internet, Safari 16.4 or newer and Firefox 130 or newer.
How to cut just one part of the audio
Times can be typed in seconds (75), minutes and seconds (1:15), or hours, minutes and seconds (1:02:03). Decimals work for precise cuts, such as 0:12.5. Leave a box empty to start at the beginning or run to the end.
- Ringtone or alert sound: pick the 20 to 30 seconds you want and save as MP3 or M4A.
- One song from a concert or wedding video: play the video first, note where the song starts and ends, and type those times.
- One answer from a long interview: cut it out as MP3 at 128 kbps so it is small enough to send on WhatsApp or by email.
The tool tells you the clip length and the expected file size before you convert, and stops you if the end is before the start.
Other ways to do it
If you’d rather use an installed app, these work too:
- VLC (Windows, Mac, Linux): Media → Convert / Save, choose the video, pick the “Audio – MP3” profile, and set a file name. It is free but the menus are easy to get wrong.
- Audacity: can open many video files and export the sound, but it needs the separate FFmpeg library installed for formats like MP4.
- FFmpeg on the command line:
ffmpeg -i video.mp4 -vn -c:a copy audio.m4acopies the sound out without re-encoding. Good for batches, if you are comfortable with a terminal.
Online converters that upload your file work as well, but a long video can take minutes to upload, and the file sits on someone else’s server. For private recordings, a tool that runs on your device is the safer choice.
Related tools and guides
- Compress video: shrink the video itself for WhatsApp, Discord or email.
- How to compress a video: what size fits where, and how much quality you lose.
- Image converter: turn a screenshot or HEIC photo from the same phone into JPG or PNG.
Frequently asked questions
How do I convert MP4 to MP3 without losing quality?
Choose MP3 at 192 or 320 kbps; at those rates you will not hear a difference from the video’s sound. If you need a perfect copy, choose M4A instead: phone videos already carry AAC sound, so it is copied out bit for bit with no re-encoding at all.
Can I extract audio from a video on my phone?
Yes. Open the video to MP3 tool in Chrome, Safari or Samsung Internet, tap Choose video and pick it from your gallery or files. The MP3 is made on the phone and saved to your downloads.
Why is there no sound in my MP3?
The video may have no sound track (screen recordings sometimes don’t), or the sound was muted when it was recorded. The tool says “This file has no sound track” when there is nothing to extract. If the preview plays silence, check the original video plays with sound first.
Is it legal to rip the audio from a video?
Converting your own recordings, or videos you have the rights to, is fine. Music and films from other people are usually copyrighted, and sites like YouTube have their own terms, so only convert what you are allowed to use. This is general information, not legal advice.