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AVI to MP4

Convert AVI video files to modern MP4 format in your browser. AVI uses older codecs, is not supported on iPhone/iPad, and creates large files. MP4 with H.264 is 50–80% smaller at the same quality and plays on every device. No signup.

Updated June 2026

  1. 1Upload your AVI video
  2. 2Conversion runs instantly
  3. 3Download your MP4 file

Drop your video anywhere, click to browse

MP4, MOV, AVI, MKV, WebM, FLV, WMV, VOB

Ctrl+Vto paste a copied file

How to use AVI to MP4

  1. 1

    Upload your AVI video

    Drag and drop your AVI file into the upload area, or click to browse and select it from your device. Nothing is sent to a server.

  2. 2

    Conversion runs instantly

    ToolBubble converts the video to MP4 directly in your browser — no waiting in an upload queue.

  3. 3

    Download your MP4 file

    Once processing finishes, the converted MP4 file downloads automatically to your device.

Frequently asked questions

Everything you need to know about avi to mp4.

AVI (Audio Video Interleave) was developed by Microsoft in 1992. It is a container with limited support for modern codecs, chapters, subtitles, and metadata. MP4 is the modern replacement with better compression and universal compatibility.

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