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.

Instant Audio Extraction

High-Quality MP3 Output

No Signup Required

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使い方

3ステップ。インストール不要。数分で完了。

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

Upload Your MP4. Drag your video into Cacao Docs — movies, recordings, Zoom calls, YouTube downloads, whatever. We take them all.

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.

Download Your MP3. Hit download and you are done. Play it, share it, edit it, or transcribe it — the MP3 is all yours.

あなたの完全な音声・動画ツールキット

書き起こし、変換、抽出 — 音声・動画のすべてを一箇所で処理。

AI書き起こし

話者ラベル、タイムスタンプ、95%以上の精度で音声をテキストに。

フォーマット変換

MP3、WAV、M4A、OGG、FLAC — 任意の音声または動画フォーマットを瞬時に変換。

動画から音声へ

MP4、YouTube、Zoom録音などから音声を抽出。

超高速

ほとんどのファイルは3分以内に処理。待ち時間なし。

登録不要

すぐに開始

100%安全

自動削除

ブラウザベース

インストール不要

このツールを愛用する人々

ポッドキャスター、研究者、マーケター、リモートチームが毎日利用しています。

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 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 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 Thornton

824 人が今日ファイルを変換しました

読み込み中...

信頼され、認定された業界のリーダー

なぜこの音声・動画ツールを選ぶのか

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

登録不要。ツールを選んで始めましょう。

Extract MP3 from MP4

4.6

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4.5

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4.6

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よくある質問

音声・動画の書き起こしと変換ツールに関する簡単な回答。