AVI to MP4 Converter
Haikit converts AVI video to MP4 in your browser, for free. Add your video, choose the quality, and download the MP4. AVI is an old format that many phones and websites no longer handle, while MP4 is widely supported.
Drop a video here
MP4, MOV, MKV, WebM, AVI and more. Files up to 50 MB.
You can also paste with Ctrl+V.
Your files are converted on your device and are never uploaded.
How to use AVI to MP4
- 1
Add your AVI video. Files up to 50 MB are free.
- 2
MP4 is already selected. Choose a resolution and quality if you want a smaller file.
- 3
Click Convert and download the result. Larger videos take longer, because the work happens on your device.
What is free and what is paid
Free, no sign-up
- Convert one video at a time to MP4, MOV, MKV, WebM, AVI or GIF
- Choose the resolution and quality
- Make a video smaller
- Files up to 50 MB
Questions
Will converting AVI to MP4 lose quality?
A small amount, because the video is re-encoded. At the Balanced setting the difference is rarely visible, and MP4 files are usually much smaller than AVI. Choose High quality for the closest match.
Is AVI to MP4 free?
Yes. You can convert one video at a time, up to 50 MB, for free with no sign-up. Paid plans convert up to 10 videos at once and handle files up to 300 MB.
Are my files uploaded?
No. The conversion runs inside your browser, so your file never leaves your device. The converter itself downloads once (about 30 MB) and your browser keeps it for next time.
Do I need to install anything?
No. Haikit works in the browser on Windows, Mac, Linux, iPhone and Android. There is nothing to download or install.
Updated October 2026