Podcasters and creators
Turn interview videos into MP3 audio
Pull clean audio from recorded interviews, reaction videos, creator clips, or podcast camera recordings for publishing and repurposing.
MP4 to MP3 Converter
Convert MP4 to MP3 online for lectures, interviews, podcasts, meeting recordings, webinars, and short clips you want to listen to later. MOV, WebM, MKV, and AVI work too.
Convert MP4 to MP3
Choose a file
or drag and drop
Sign in to run this tool — 100 free credits on signup.
Popular MP4 to MP3 use cases
Students and educators
Convert lecture or webinar videos to MP3
Save long course videos, webinars, conference talks, and screen recordings as smaller audio files for listening offline.
Teams
Extract meeting audio for notes and transcription
Create MP3 files from meeting recordings, product demos, sales calls, and customer interviews before sending them to transcription tools.
FFmpeg flags used by this tool
Quick reference for what each parameter actually does.
- -vn
- No video — drops the video stream so the output is audio-only MP3. Saves CPU and avoids container weirdness.
- -c:a libmp3lame
- The reference MP3 encoder (LAME). High quality, mature, and what every other tool actually uses under the hood.
- -b:a
- Audio bitrate target. 128k is fine for speech, 192k is the music sweet spot, 320k is as good as MP3 gets.
- -ar 44100
- 44.1 kHz sample rate — the CD standard, the right default for music.
- -ac 1
- Downmix to mono — halves the file size, good for podcasts and voice.
How it works
- 01
Upload an MP4 or paste a URL
Drop an MP4, MOV, WebM, MKV, AVI, or paste a public video URL. Up to 5 GB.
- 02
Pick a quality preset
High (320k) for music, Standard (192k) for general use, Small (128k) if it's just speech and you want it tiny.
- 03
Process in the cloud
We strip the video stream and encode the audio with LAME, the standard MP3 encoder used by FFmpeg.
- 04
Download the MP3
Temporary download link as soon as it's done. Files auto-delete after 7 days.
FAQ
Which preset should I pick?
High (320k) for music you care about. Standard (192k) for casual listening — most people can't tell it apart from 320k. Small (128k) for podcasts, lectures, and audiobooks where speech intelligibility matters more than fidelity.
Is MP3 better than AAC?
Technically AAC is more efficient — same perceived quality at ~30% smaller files. But MP3 plays everywhere without question. If you want AAC, Opus, or FLAC, use Extract Audio instead.
Why does my MP3 sound worse than the original?
MP3 is lossy — it discards parts of the signal the human ear is least sensitive to. At 192k+ this is rarely audible; below 128k it can be obvious, especially with cymbals and reverb tails. Use Extract Audio with FLAC for lossless.
Can I convert MP4 to MP3 online?
Yes. Upload an MP4 or paste a public MP4 URL, choose an MP3 quality preset, and download the extracted audio when the cloud task finishes.
Can I convert MOV, WebM, MKV, or AVI to MP3?
Yes. The converter uses FFmpeg, so common video containers like MOV, WebM, MKV, AVI, FLV, and MP4 are supported as long as the file is readable.
Will the MP3 keep the original video quality?
The video stream is removed, so video quality no longer matters. Audio quality depends on the source audio and the MP3 bitrate you choose.
Can I make speech files smaller?
Yes. Pick the Small preset or open Advanced and choose mono plus a lower bitrate. Mono speech at 96k or 128k is usually clear and much smaller than stereo music settings.
Does it work on YouTube videos?
Not directly — YouTube URLs aren't accepted (terms of service). Download with yt-dlp first, then convert here.
Is this free?
Sign up for 100 free credits. A typical conversion costs 1–3 credits depending on length. No subscription, top up as you go.
Related video tools
Need to convert MP4 to MP3 in code?
This online MP4-to-MP3 converter is a wrapper around the FFHub REST API. The same audio extraction command can run from your backend, queue, automation script, or build pipeline.
View API docscurl -X POST https://api.ffhub.io/v1/tasks \
-H 'Authorization: Bearer YOUR_API_KEY' \
-H 'Content-Type: application/json' \
-d {
"command": "-i https://you.com/in.mp4 -vn -ar 44100 -c:a libmp3lame -b:a 320k output.mp3"
}