Update older video formats for modern playback. Every conversion runs locally on your Mac — your AVI files are never uploaded.
macOS 14 or later · Apple silicon · Free to try
AVI is an older Microsoft video format. MP4 is the universal video format that plays on virtually every device. Update older video formats for modern playback.
PrivateRemix handles the AVI-to-MP4 conversion in a couple of clicks, with the result saved right next to your original file.
Unlike free online converters, PrivateRemix has no server. Your AVI files stay on your Mac — no upload, no cloud, no account.
Drag a AVI file into PrivateRemix, or pick one from your Mac.
Select MP4 from the formats PrivateRemix offers for your file.
The new MP4 appears next to the original. Nothing leaves your Mac.
The change is minimal. Both formats are compressed, and PrivateRemix converts at a high quality setting so there is no visible or audible drop for everyday use.
AVI is an older format that produces large files and struggles on modern phones and web players. MP4 is smaller and plays everywhere.
For sharing and playback, yes — MP4 is supported by nearly every phone, TV, browser and editor, which is why it's the safe default.
No. PrivateRemix runs entirely on your Mac using its own processor. Your AVI files never leave the device — there is no server to upload to, and it works fully offline.
Yes. Drop in a batch of AVI files and PrivateRemix converts them all locally, saving each new MP4 next to its original.
Free to try. macOS 14 or later, Apple silicon.