Convert AVI to MP4 — Free & Private
Convert AVI to MP4 online for free. AVI is a classic Microsoft video container format; MP4 is the most universally compatible video format. All processing happens locally in your browser — your files never leave your device.
How to convert AVI to MP4
- 1
Select your AVI file
Click or drag your AVI file onto the converter above.
- 2
Convert to MP4
The output format is pre-set to MP4. Click the convert button to process your file.
- 3
Save instantly
Your converted MP4 file is ready — save it to your device, no email required.
AVI to MP4 — FAQ
Is the AVI to MP4 converter really free?
Yes, completely free. No hidden fees, no watermarks, no file size limits. LocalConvert is open source and free forever.
Are my AVI files safe?
Absolutely. Your files never leave your browser. All AVI to MP4 conversion happens using WebAssembly running locally on your device — no uploads, ever.
How long does AVI to MP4 conversion take?
Most conversions finish in seconds. Larger files may take a little longer depending on your device's speed and memory.
What's the difference between AVI and MP4?
AVI is a classic Microsoft video container format. MP4 is the most universally compatible video format.