AVI to MP4 Converter
Convert old AVI videos to modern MP4 (H.264 + AAC) that plays everywhere. Private, in-browser.
How to convert AVI to MP4
- 1
Choose your AVI files
Click the upload area or drag files onto it. Nothing is uploaded — files are opened locally.
- 2
Adjust the settings
Pick quality, then press the convert button.
- 3
Download the result
Save each file individually or everything at once as a ZIP.
AVI videos from older cameras, dashcams and legacy software are large and don’t play on phones or websites. Convert them to MP4 for smaller files and universal playback.
What is AVI?
AVI is an old Microsoft video format still produced by some cameras, dashcams and legacy software. Files are large and modern devices and websites often can’t play them.
What is MP4?
MP4 is the most widely supported video format, used by phones, cameras, YouTube and every social platform.
Safe for confidential files
Unlike upload-based converters, ZapMorph processes files inside your browser tab. Your documents are never transmitted, stored or logged — close the tab and they’re gone.
Frequently asked questions
Is the avi to mp4 converter free?
This is a Pro tool. With a free account you get one run a day to try it; Pro and Lifetime plans include unlimited use.
Are my files uploaded to a server?
No. The conversion runs entirely in your browser, so your files never leave your device. We only count how many files you convert — never their names or contents.
What is the maximum file size?
Up to 25 MB per file without an account, 50 MB with a free account, and 1 GB on Pro. Very large files also depend on your device’s memory.
Can I convert multiple AVI files at once?
Yes. Select several AVI files at once — up to 5 on the free plan or 50 on Pro — and download all results in a single ZIP.
Does it work on Mac, Windows, iPhone and Android?
Yes. It works in any modern browser — Chrome, Edge, Firefox and Safari — on desktop and mobile, with nothing to install.
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