Extract MP3 audio from any video
MP4, MOV, MKV, WebM — pull the audio out and save it as a high-quality MP3. Runs entirely in your browser.
How it works
1
Drop a video
Any common video container — MP4, MOV, MKV, WebM, AVI.
2
Pick MP3 quality
128 kbps for podcasts, 192 kbps default, 320 kbps for music.
3
Download
Hit extract and grab the MP3.
Why use Toolstack's MP4 to MP3?
100% private
Your file never leaves your device — everything runs locally in your browser.
Instant
No upload, no queue. The result is ready as soon as your laptop finishes the math.
Free forever
No signup, no credit card, no daily limits for the core features.
Open standards
We use proven open-source libraries — no proprietary lock-in, no shady tracking.