MP4 to MP3 converter, free and in your browser
Keep the sound, leave the picture. Subtrims saves the audio from your video as MP3, or WAV for an uncompressed file. It is free, needs no account, and your file stays on your device.
Convert MP4 to MP3 free online, without uploading
Most online converters send your video to a server first. Subtrims extracts the audio inside your browser instead, so nothing is uploaded and there is no queue. That makes it handy for client footage, interviews and private recordings.
How to extract audio from video
- Open the MP4 → MP3 tool.
- Drop in a video. MP4, MOV and WebM are accepted; codec support depends on your browser.
- Choose MP3 for a smaller file, or WAV for uncompressed audio.
- Press Extract Audio and download the file.
MP3 or WAV: which to choose
MP3 is smaller and plays almost everywhere, so it is the right pick for sharing, podcasts drafts or listening on your phone. WAV is uncompressed, which is useful when you plan to keep editing the audio in a DAW or video editor. MP3 encoding uses LAME (lamejs).
What the tool does and does not do
It extracts the full audio track of your video, including any music. It does not isolate vocals or remove background noise. If you want to clean up a noisy voice recording, use the free Remove Noise tool afterwards.
Limits
Free files can be up to 5 minutes long and 100 MB. If your browser cannot read a video's codec, try re-exporting it as MP4 from your editor or phone first.
Ideas for using the audio
- Turn a talking-head video into an audio clip or voice memo.
- Pull the audio of an interview to transcribe or edit separately.
- Create subtitles: the Subtrims subtitle generator also accepts MP3 and WAV.
- Clean the voice with the noise remover, then bring it back into your editor.
FAQ
Is the MP4 to MP3 converter free?
Yes. It is free and needs no account or credit card.
Is my video uploaded?
No. The audio is extracted on your device in your browser. Your original file stays on your device.
Which video formats can I convert?
MP4, MOV and WebM. Codec support depends on your browser.
Can I download WAV instead of MP3?
Yes. Choose WAV in the download format menu for an uncompressed file.
What is the maximum file size?
Free supports videos up to 5 minutes and 100 MB.