Free online · No upload · Files stay on your device
AVI to MP4 Converter
Convert older AVI videos to MP4 privately in your browser. Free and no upload.
How it works
Instant conversion in 3 simple steps
Everything runs locally in your browser. Fast, zero upload wait.
01
Add your file
Drag and drop the source file. It stays in browser memory — we never upload it.
02
Confirm output
MP4 is pre-selected for your AVI file.
03
Download
WebAssembly finishes locally. Save the result — nothing is uploaded.
About this converter
AVI files from older cameras and PCs often need MP4 for phones and modern players. ShortVid AI converts AVI to MP4 locally so your video never leaves your device.
Supported formats
Outputs we encode today. Inputs include common video and audio containers (MP4, MOV, MKV, WEBM, AVI, and more).
- MP4
- MOV
- WEBM
- AVI
- MKV
- GIF
- MP3
- WAV
Popular conversions
Why convert privately?
- No upload. Your media stays in browser memory. We do not store converter files on our servers.
- No cloud wait. Skip upload queues — conversion starts on your device with WebAssembly.
- Free & simple. No sign-up and no watermark from us on the exported file.
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Frequently asked questions
- Can I convert AVI to MP4 online free?
- Yes. Drop the AVI, keep MP4 selected, and convert in your browser.
- Is my AVI uploaded?
- No. Files stay on your device during conversion.
- What if the AVI has an old codec?
- Some rare codecs may not decode in-browser. Try another player export or a desktop tool if conversion fails.