AVI to MP4

Re-encode an AVI file — often an older or camcorder-era format — into a modern MP4 with H.264 video and AAC audio. MP4 is supported by every phone, browser, and TV, and produces a much smaller file than the original AVI for the same visual quality. The conversion runs locally via ffmpeg.wasm, so your file never leaves your device. Performance depends on your CPU: expect roughly real-time encoding for short clips (a 5-minute 720p video may take 1–2 minutes). Very large files or 4K sources may be slow or run out of memory — for best results keep inputs under about 500 MB.