MP4 to MP3 Converter
Pull the sound out of a video - MP4, MOV or WEBM - and save it as an MP3. Converted in your browser: the video is never uploaded.
🔒 Your audio never leaves your computer - it's processed right here in your browser.
How it works
Add MP4 files
Drop in one MP4 file or a whole batch - or click to choose them.
Check the format
MP3 is already selected at 192 kbps - change it if you like.
Convert & save
Everything is converted on your device - save each file, or all of them at once.
How to convert MP4 to MP3 online
Drop in a video and get just its soundtrack as an MP3 - a song from a music video, a talk, a voice memo recorded as video. The video file stays on your computer.
Add your MP4 files
Drop them on the box above or click to choose. Several at once is fine.
Choose the quality
MP3 is already picked. For MP3, 192 kbps suits most music, 320 kbps is the best, 128 kbps is smallest.
Convert
Press Convert. Each file shows a tick and its new size when it's done.
Save
Save files one by one, or Save all - allow multiple downloads once if your browser asks.
Frequently asked questions
Can it convert MP4 to MP3 without uploading?
Yes. The video is decoded by your own browser and the MP3 is made on your computer - nothing is uploaded, so it's private and there's no size limit.
Which video files work?
MP4 and M4V with AAC sound (most phone and camera videos), WEBM, and in Chrome and Edge usually MOV too. If a file won't open, the browser can't read its sound track.
Will the MP3 sound as good as the video?
At 192 kbps the MP3 is as good as the sound in most videos. Pick 320 kbps for the highest quality, or WAV for a lossless copy.
Can I convert a YouTube link?
No - this converts video files you have on your device. It doesn't download from websites.
Why does Save all ask for permission?
Browsers protect you from sites that download many files at once. Allow it once for swarasound.com and the rest save automatically.
Got lyrics but no song yet?
Turn them into a finished, original song with Swara Sound - free, unlimited, and every file is yours.
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