Convert AVI to MP4 in Seconds

Got an AVI that won't play on your phone or upload to YouTube? Cacao Docs converts it to MP4 instantly — free, private, zero installs.

Instant AVI to MP4

No Signup Required

Works on Any Device

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または

使い方

3ステップ。インストール不要。数分で完了。

AVI to MP4 Converter — Convert AVI Video Files to MP4 Online Free | Cacao Docs

Upload Your AVI. Drag your AVI file into Cacao Docs or click to browse. Old home videos, downloaded clips, legacy recordings — any AVI works.

Cacao Docs Converts It. Our engine converts your AVI into a clean, modern MP4 in seconds. High quality, fast, no settings to mess with.

Download Your MP4. Grab your MP4 and you're done. Plays on any phone, Smart TV, browser, or video editor — no more compatibility headaches.

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 15

Finally got my old home videos on my phone

Had years of family videos stuck in AVI that nothing would play. Cacao Docs converted them all to MP4 and now they're on my phone and backed up to the cloud. Priceless.

Sandra Müller

Feb 3

YouTube stopped rejecting my uploads

Was uploading AVI files to YouTube and kept getting format errors. Cacao Docs converted them to MP4 and everything went through first try. Should've done this ages ago.

Kwame Asante

Jan 26

Fast, clean, no watermarks

Converted a big batch of old AVI clips in one session. Cacao Docs was fast, the quality held up perfectly, and there was no watermark or sign-up wall. Exactly what I needed.

Tara Lindqvist

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

Works on Everything Now

AVI is old-school — great in its day, but phones, streaming platforms, and modern editors often choke on it. MP4 is the universal standard. Cacao Docs gets you there in one click.

Quality Stays Sharp

Cacao Docs converts your AVI to MP4 while keeping the video and audio quality as close to the original as possible. No blurry output, no weird artifacts.

Upload to YouTube & Social

YouTube, Instagram, TikTok — they all prefer MP4. Cacao Docs converts your AVI so you can upload straight away without any format rejection nonsense.

Batch Convert the Whole Archive

Got a folder full of old AVI files to modernize? Cacao Docs lets you queue them up and convert back to back. No repetitive uploading, no wasted time.

Transcribe the Audio After

Once you have your MP4, run it through Cacao Docs AI transcription to pull out subtitles, captions, or a full text transcript. One platform, full workflow.

Encrypted & Auto-Deleted

Your video is locked with encryption on upload and wiped from Cacao Docs servers the second conversion is done. Zero data stored, zero risk.

Works on Everything Now

AVI is old-school — great in its day, but phones, streaming platforms, and modern editors often choke on it. MP4 is the universal standard. Cacao Docs gets you there in one click.

Quality Stays Sharp

Cacao Docs converts your AVI to MP4 while keeping the video and audio quality as close to the original as possible. No blurry output, no weird artifacts.

Upload to YouTube & Social

YouTube, Instagram, TikTok — they all prefer MP4. Cacao Docs converts your AVI so you can upload straight away without any format rejection nonsense.

Batch Convert the Whole Archive

Got a folder full of old AVI files to modernize? Cacao Docs lets you queue them up and convert back to back. No repetitive uploading, no wasted time.

Transcribe the Audio After

Once you have your MP4, run it through Cacao Docs AI transcription to pull out subtitles, captions, or a full text transcript. One platform, full workflow.

Encrypted & Auto-Deleted

Your video is locked with encryption on upload and wiped from Cacao Docs servers the second conversion is done. Zero data stored, zero risk.

AVI to MP4 Online

登録不要。ツールを選んで始めましょう。

Convert AVI to MP4

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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。