Free MP4 to MP3 Converter
Extract the audio from any video as a clean MP3 — free, no signup, no watermark. Done in seconds.
Free · No signup · 3 uses per day
How it works
- 1Upload your video file (MP4, MOV, MKV, WebM — up to 25MB free).
- 2We extract the audio track and encode it as a 128kbps MP3.
- 3Download your MP3 instantly. Need bigger files or batch conversion? A free Atomiser account handles both.
Frequently asked questions
Is this MP4 to MP3 converter really free?
Yes — completely free for files up to 25MB, 3 conversions per day, no signup and no watermark on the audio. Larger files are free too with an Atomiser account (30 monthly credits, no card).
What video formats can I convert to MP3?
MP4, MOV, MKV, WebM and AVI all work. The audio track is extracted and re-encoded as MP3 at 128kbps.
Is my file stored on your servers?
No. Files are processed in memory and temporary files are deleted immediately after conversion completes.
Can I transcribe the audio after converting?
Yes — run the MP3 through our free Audio to Text converter, or upload the original video to Atomiser and get the transcript, captions and clips in one pass.
More free tools
One video. Everything else.
This tool is one piece of Atomiser: upload once and get clips, captions, thumbnails, transcripts, show notes and social posts — published to 8+ platforms.
Start Free — 60 Credits/Month