Ijharul Islam
To extract audio from a video, open the video in a tool that can read its sound track and save that track on its own: as an uncompressed WAV, a copy of the original AAC, or an MP3. The quickest free way is a browser tool such as QuickVeed's audio extractor, which saves a WAV without uploading the video; FFmpeg does it from the command line in one line.
Below are four free methods, which format to choose, how large each file will be, and what to do next if you want a transcript or a podcast episode from that audio.
The short answer
To extract audio from a video for free, open it in a browser tool such as QuickVeed's Extract Audio from Video and click Save WAV, or run ffmpeg -i video.mp4 -vn -c:a copy audio.m4a to copy the original sound with no quality loss. Use WAV for editing, M4A to keep the original quality small, and MP3 for sharing.
Key takeaways
- Copying the original audio track (usually AAC in an .m4a file) is fastest and loses nothing.
- WAV is uncompressed: about 10 MB per stereo minute at 44.1 kHz. Every editor opens it.
- MP3 is the most compatible for sharing but re-encodes the sound, so a little quality is lost.
- Only extract audio you own or have permission to use.
Disclosure: we make QuickVeed and show how to do this in it, along with other ways. Details about other products come from their public pages, checked in October 2026 and linked at the end.
Which audio format should you extract to
A video file is a container holding a picture track and one or more sound tracks. Most phone and web videos store sound as AAC. Extracting means saving that sound track on its own, either copied as it is or converted.
| Format | Quality | Size per stereo minute | Best for |
|---|---|---|---|
| WAV (16-bit, 44.1 kHz) | Uncompressed, no further loss | About 10 MB | Editing, cleanup, transcription tools |
| M4A (copied AAC) | Identical to the video's sound | Same as in the video, often 1-2 MB | Keeping the original quality small |
| MP3 at 192 kbps | Re-encoded, slight loss | About 1.4 MB | Sharing, podcasts, old players |
| MP3 at 128 kbps | Re-encoded, more loss | About 1 MB | Voice notes, small files |
The size figures are simple arithmetic: 44,100 samples a second, 2 bytes each, 2 channels, 60 seconds is about 10.6 MB. MP3 sizes follow from the bitrate: 192 kilobits a second for 60 seconds is 1.44 MB. Mono halves the WAV size and is fine for speech.
Method 1: Extract audio in your browser (no upload)
QuickVeed's free Extract Audio from Video tool decodes the sound track inside your browser. It is free, runs in your browser, nothing is uploaded and no sign-up is needed.
- Open the tool and drop your video: MP4, M4V, MOV or WebM, up to 500 MB.
- The browser decodes the whole sound track in a few seconds; it doesn't need to play the video in real time.
- Optionally set a start and end time to keep part of it, to a tenth of a second.
- Choose stereo or mono. Mono halves the file and suits voice and transcription.
- Listen to the preview and click Save WAV.
The result is a 16-bit PCM WAV at your device's sample rate, usually 44.1 or 48 kHz. The tool doesn't make MP3, because browsers don't include an MP3 encoder; any audio editor can convert the WAV afterwards. The WAV can be up to 1.5 GB, about two hours of stereo, so trim or choose mono for longer files. Which videos work depends on what your browser can decode: MP4 with AAC and WebM work in Chrome, Edge and Firefox, and Safari handles MP4 and MOV.
This works on phones too: open the tool in your phone's browser, pick the video from your camera roll, and save the WAV to your files. Large files decode faster on a computer, and very long videos can hit a phone's memory limits, so trim them first if decoding fails.
Method 2: Extract audio with FFmpeg
FFmpeg is a free, open-source command-line tool that runs on Windows, macOS and Linux. It's the best option for batches, long files or exact control.
| What you want | Command |
|---|---|
| Copy the original sound, no quality loss | ffmpeg -i video.mp4 -vn -c:a copy audio.m4a |
| Uncompressed WAV | ffmpeg -i video.mp4 -vn audio.wav |
| MP3 at 192 kbps | ffmpeg -i video.mp4 -vn -c:a libmp3lame -b:a 192k audio.mp3 |
| Mono WAV for transcription | ffmpeg -i video.mp4 -vn -ac 1 audio.wav |
| Only 1:30 to 2:45 | ffmpeg -ss 00:01:30 -to 00:02:45 -i video.mp4 -vn audio.wav |
-vn drops the video and -c:a copy copies the sound track without re-encoding. The copy command only works when the container you name can hold the original codec: AAC goes in .m4a, Opus from a WebM goes in .opus or .ogg. If you're not sure what's inside, run ffmpeg -i video.mp4 and read the Audio line.
To process every MP4 in a folder on macOS or Linux, loop over the files: for f in *.mp4; do ffmpeg -i "$f" -vn "${f%.mp4}.wav"; done. On Windows, PowerShell can do the same with a foreach loop, or run the single-file command once per video.
Install FFmpeg from the official site's download page or a package manager (Homebrew on macOS, your distribution's package manager on Linux). Avoid random download sites that bundle extra software.
Method 3: On a phone, and Method 4: In an editor
On a phone
Phones' built-in photo apps edit video but generally don't save sound on its own. The simplest route is to open the browser tool from Method 1 on your phone, or to share the video to a computer. Screen-recording apps and voice recorder apps don't help here; they re-record the sound and lose quality.
In a video or audio editor
Most video editors can export audio only. In a typical editor you add the video to the timeline, choose Export, and pick an audio-only format such as WAV or MP3. Audio editors that import video files can also open the sound track directly. This route is handy when you also want to trim, clean up noise or level the volume before saving.
| Method | Cost | Uploads your file | Formats | Good for |
|---|---|---|---|---|
| Browser tool | Free | No | WAV | One-off files, privacy |
| FFmpeg | Free | No | Any | Batches, lossless copy |
| Video or audio editor | Free to paid | No | Usually WAV, MP3, AAC | Editing at the same time |
| Online converter sites | Often free with limits | Usually yes | Varies | When you can't install anything |
Troubleshooting: no sound, wrong rate or several tracks
Extraction usually just works, but these problems come up:
| Problem | Why it happens | Fix |
|---|---|---|
| The tool says it can't decode the sound | The browser doesn't support the video's audio codec | Try another browser, or use FFmpeg, which reads almost every codec |
| The WAV is silent | The video has no audio track, or a silent one | Run ffmpeg -i video.mp4 and look for an Audio line |
| WAV is 48 kHz but the video was 44.1 kHz | Browsers decode at the device's sample rate | Both rates are standard; convert only if a tool insists |
| Only one language came out | The video has several audio tracks | With FFmpeg, pick a track: -map 0:a:1 for the second |
| File is too big to email | WAV is uncompressed | Choose mono, trim it, or convert to MP3 |
| Copy command fails | The codec doesn't fit the container | Use .m4a for AAC, .opus for Opus, or convert to WAV |
Pick the right settings for what comes next
- For transcription: mono WAV or the copied AAC is plenty. Speech recognition doesn't need stereo.
- For editing and mixing: stereo WAV, so every edit starts from full quality.
- For a podcast feed: MP3 at 128 kbps mono or 192 kbps stereo is a common choice, made from the WAV after editing.
- For archiving: keep the original video. It already holds the sound at its original quality.
A practical tip: if you'll process many files, test your settings on one short file first and listen to the result before running the whole batch.
What to do with the audio next
- Get a transcript or subtitles. QuickVeed's Captions & subtitles transcribes the video itself, so you don't need to extract the audio first: 1.5 credits a minute, rounded up (15 credits for a 10-minute video), with SRT, VTT or TXT downloads.
- Turn a recorded call into a podcast. Extract a WAV, clean it in an audio editor, export MP3 at 128-192 kbps.
- Replace the voice-over. Remove the original sound with the free mute video tool, then make a new narration with the AI voice generator (for example 25 credits per 1,000 characters on ElevenLabs v3).
- Make a waveform image for a podcast cover with the free audio waveform generator.
If what you actually want is a silent video rather than the sound, see how to remove audio from a video.
Frequently asked questions
How do I extract audio from an MP4 for free?
Open the MP4 in QuickVeed's free Extract Audio from Video tool and click Save WAV, or run ffmpeg -i video.mp4 -vn -c:a copy audio.m4a to copy the sound with no quality loss.
Can I extract audio from a video as MP3?
Yes, with FFmpeg (ffmpeg -i video.mp4 -vn -c:a libmp3lame -b:a 192k audio.mp3) or most audio editors. Browser tools usually save WAV, which you can convert to MP3 afterwards.
Does extracting audio reduce quality?
Not if you copy the original track or save WAV. Converting to MP3 re-encodes the sound and loses a little quality.
Why is the WAV bigger than my video?
WAV is uncompressed, about 10 MB per stereo minute at 44.1 kHz, while the video stores its sound compressed as AAC. Choose mono to halve it.
Can I extract audio from a YouTube video?
Only from videos you own or have permission to use. YouTube's terms don't allow downloading other people's videos except through features YouTube provides. For your own videos, download the original from YouTube Studio and extract from that.
Is it legal to extract audio from a video?
Extracting is fine for your own recordings or material you're licensed to use. Reusing someone else's music or speech can infringe copyright.
Try it with your own video
Skip the extraction step and get a transcript straight from your video. Try the free tools first, then upload a video when you want captions, clips or dubbing. QuickVeed plans start at $18/month, and new accounts get a 14-day trial with 75 credits, no card needed. Sign up or see pricing.
Sources
Competitor details in this post were checked against these public pages in October 2026. Products and prices change, so confirm with each vendor before you decide.
