Is this tool really free?

Yes, 100% free with no limits, no signup, and no watermarks.

Does my file get uploaded to a server?

No. Everything runs locally in your browser — your file never leaves your device.

MP4 is smaller and plays natively in browsers and on modern devices, unlike many AVI files.

AVI to MP4 runs entirely in your browser. Enable JavaScript to use the interactive tool — your files are processed locally and never uploaded.

AVI to MP4 converts legacy Audio Video Interleave (.avi) files into the highly compressed, modern MP4 format using local processing power.

Yes, 100% free with no limits, no signup, and no watermarks.
No. Everything runs locally in your browser — your file never leaves your device.
MP4 is smaller and plays natively in browsers and on modern devices, unlike many AVI files.