Extract MP3 Audio from Your MP4 Video

Just want the audio? Drop your MP4 into Cacao Docs and pull out a clean MP3 in seconds — free, private, and zero hassle.

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1.5M users
17,150 reviews

How It Works

MP4 to MP3 Converter — Extract Audio from Video Online Free | Cacao Docs
1
Upload Your MP4. Drag your video into Cacao Docs — movies, recordings, Zoom calls, YouTube downloads, whatever. We take them all.
2
Cacao Docs Strips the Audio. Our engine pulls the audio track out of your video and converts it to a crisp MP3. Takes seconds, not minutes.
3
Download Your MP3. Hit download and you are done. Play it, share it, edit it, or transcribe it — the MP3 is all yours.

Your Complete Audio & Video Toolkit

Transcribe, convert, extract — everything audio & video, handled in one place.

AI Transcription

Speech to text with speaker labels, timestamps, and 95%+ accuracy.

Format Conversion

MP3, WAV, M4A, OGG, FLAC — convert any audio or video format instantly.

Video to Audio

Extract audio from MP4, YouTube, Zoom recordings, and more.

Lightning Fast

Most files processed in under three minutes. No waiting around.

No Signup
Start instantly
100% Secure
Auto-deleted
Browser-Based
No installs

People Love These Tools

Podcasters, researchers, marketers, and remote teams use our audio & video tools every day.

Feb 11
Ripped my whole lecture library
Had 30+ recorded lectures in MP4. Needed audio only for my commute. Cacao Docs converted them all super fast and the quality is perfect.
Lena FischerInstagram logo
Lena Fischer
Jan 29
No ads, no BS — just works
Every other converter site is a minefield of popups. Cacao Docs is clean, instant, and free. Bookmarked it permanently.
Chris OkaforInstagram logo
Chris Okafor
Feb 7
Saved my podcast episode
Recorded an interview on video but only needed the audio for my podcast feed. Cacao Docs extracted it perfectly. Sounded pro.
Mia ThorntonInstagram logo
Mia Thornton
824 people converted files today
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Trusted and Secured by Industry Experts

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Why People Pick Our Audio & Video Tools

Rip Audio in a Flash

No waiting around. Cacao Docs extracts and converts your MP4 audio at crazy speed — most files are done before you can blink.

Crystal-Clear Quality

Cacao Docs preserves the original audio quality during extraction. You get a high-bitrate MP3 that actually sounds good.

Works on Any Video

Not just MP4. Throw in MOV, AVI, MKV, WebM, or FLV — Cacao Docs handles all major video formats without breaking a sweat.

Podcast & Music Ready

Extract voiceovers, background music, or full recordings and drop them straight into your podcast editor or DAW. Cacao Docs makes it effortless.

Transcribe Right After

Once you have your MP3, run it through Cacao Docs AI transcription and get an accurate text transcript in minutes. One platform, full workflow.

Your Files, Your Business

Uploads are encrypted and wiped from Cacao Docs servers the moment conversion is done. Nobody sees your video — ever.

Rip Audio in a Flash

No waiting around. Cacao Docs extracts and converts your MP4 audio at crazy speed — most files are done before you can blink.

Crystal-Clear Quality

Cacao Docs preserves the original audio quality during extraction. You get a high-bitrate MP3 that actually sounds good.

Works on Any Video

Not just MP4. Throw in MOV, AVI, MKV, WebM, or FLV — Cacao Docs handles all major video formats without breaking a sweat.

Podcast & Music Ready

Extract voiceovers, background music, or full recordings and drop them straight into your podcast editor or DAW. Cacao Docs makes it effortless.

Transcribe Right After

Once you have your MP3, run it through Cacao Docs AI transcription and get an accurate text transcript in minutes. One platform, full workflow.

Your Files, Your Business

Uploads are encrypted and wiped from Cacao Docs servers the moment conversion is done. Nobody sees your video — ever.

MP4 to MP3 Online

No signup needed. Just pick a tool and go.

Extract MP3 from MP4
4.6
1,340 reviews
4.5
13,920 reviews
4.6
4,550 reviews

Frequently Asked Questions

Quick answers about our audio & video transcription and conversion tools.

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MP4 to MP3 Converter — Extract Audio from Video Online Free | Cacao Docs - Cacao Docs