Private media conversion
AVI to MP4 Converter
Transcode an AVI into broadly compatible H.264 MP4 with AAC audio while keeping the video on your device.
The engine downloads once from a CDN. Your media remains on this device.
How to use the avi to mp4 converter
- STEP 1Choose a AVI file up to 200 MB.
- STEP 2Convert it locally to MP4.
- STEP 3Download the finished MP4 file.
About this tool
MP4 improves compatibility with browsers, phones, messaging apps, presentation software, smart televisions, and modern web platforms.
The output uses H.264 CRF 23, yuv420p pixels, 160 kbps AAC audio, and fast-start metadata for progressive web playback.
Processing time depends on duration, source bitrate, output format, and device performance.
Frequently asked questions
Why must AVI be re-encoded?
AVI can contain codecs that MP4 players do not support. Genuine H.264/AAC transcoding produces a dependable modern output.
Is my AVI file uploaded?
No. FFmpeg WebAssembly performs the conversion in your browser. The engine downloads from a CDN, but your media stays on your device.
What is the maximum file size?
The browser converter accepts files up to 200 MB. Long files may require substantial device memory.