Extract audio from video
Save the audio of a talk you filmed on your phone, a lecture recording or a meeting video as a separate file. Large videos are read in chunks, and the file never leaves your browser.
Free · no sign-up · your file is processed in your browser and never sent to a server
How to use
- Choose the videoDrop an MP4, MOV, M4V, WEBM or MKV file. Nothing is uploaded; your browser reads the file where it is.
- Pick an audio formatMP3 for sharing, M4A for the fastest lossless result, WAV for editing. You can also mix down to mono.
- Extract and downloadPress "Extract audio"; when the progress bar completes, listen and download.
How it works
A video file is really a container: the picture and the sound sit inside it as separate tracks. The tool opens the container, drops the video track and writes only the audio track in the format you chose. Because the file is read piece by piece instead of all at once, large videos work too.
| Output | What happens | When to choose it |
|---|---|---|
| M4A | If the video's audio is AAC, it's copied without re-encoding: no loss, fastest. | When you want to keep the quality exactly as is |
| MP3 | The audio is re-encoded and plays on any device. | Sharing, listening on your phone, sending to transcription |
| WAV | Uncompressed; the file will be large. | Audio editing, noise reduction, video editing |
| OGG / FLAC | Very small files with Opus, or a lossless archive with FLAC. | Web use or archiving |
What you can do with the extracted audio
- Transcribe the audio of a meeting or lecture; uploading audio only is much faster than uploading the video.
- Pull a quote from an interview with the MP3 cutter.
- If there's a hum in the background, run it through noise reduction.
This tool only works with files on your device; it doesn't download from video sites. Only process content you own or have permission to use.
Privacy: your video never leaves your device
Everything happens in your browser. Your file is not sent to Voiser's servers or stored anywhere, and it's cleared from memory when you close the tab. That's also why the tool stays fast on a slow connection.
Common questions
Does converting MP4 to MP3 reduce quality?
MP3 is a lossy format, so the audio is re-encoded; at 192 kbps and above the difference is usually inaudible. If you want no loss at all, choose M4A: when the video's audio is AAC, it's copied as is.
Which video formats are supported?
MP4, MOV, M4V, WEBM and MKV. The audio inside can be AAC, MP3, Opus, Vorbis, FLAC or PCM. For rare codecs your browser can't decode, the tool lets you know.
How large a video can I process?
Up to 2 GB per file. The video isn't loaded into memory all at once, but very large files can still take a few minutes depending on your device.
Can I get audio from a YouTube or Instagram link?
No. The tool only works with the file you select and never downloads from any site. If you want a video's speech as text, have a look at Transcription.
Why does it say my video has no audio?
Some screen recordings and videos shot on mute don't contain an audio track. If there's none, the tool tells you; record again with sound on.
Related tools
- Convert MP4 to MP3Save the audio track of your MP4 videos as MP3.
- Audio converterConvert files between MP3, WAV, M4A, OGG and FLAC.
- MP3 cutter and audio trimmerSelect any part of an audio file on the waveform and cut it out.
- Remove background noiseReduce fan noise, hum and hiss in a recording, in your browser.
- Video to text converterTurn the speech in a video into a timestamped transcript.
Turn the video's speech into text and subtitles.
Transcription separates speakers and adds timestamps; download the text as subtitles or translate it into another language.