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
- 1Upload your AVI video
- 2Conversion runs instantly
- 3Download your MP4 file
Drop your video anywhere, click to browse
MP4, MOV, AVI, MKV, WebM, FLV, WMV, VOB
How to Use AVI to MP4
- 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
Conversion runs instantly
ToolBubble converts the video to MP4 directly in your browser — no waiting in an upload queue.
- 3
Download your MP4 file
Once processing finishes, the converted MP4 file downloads automatically to your device.
Frequently Asked Questions
Why is AVI format outdated?▼
How much smaller will the MP4 file be?▼
Does AVI to MP4 conversion affect video quality?▼
Is the conversion done in the browser?▼
Will the audio be preserved?▼
How to use AVI to MP4
- 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
Conversion runs instantly
ToolBubble converts the video to MP4 directly in your browser — no waiting in an upload queue.
- 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.
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