Compress an AVI file
Shrink an old AVI video by 20 to 80 percent and save it as an MP4 that plays on current devices.
Result
Upload a AVI file and click Convert. The smaller MP4 file will appear here.
What to do next
How it works
Upload an AVI video from an old camcorder or DivX rip, choose how much to reduce it (20, 40, 60 or 80 percent), and click Convert. The result is saved as MP4. For example, a 50MB video reduced by 60 percent targets about 20MB. Upload several files and they are processed one after another. Save them one at a time or as a ZIP.
The tool subtracts the audio's share from the target size, sets a video bitrate to match, and re-encodes as H.264. If the target is so low that the picture would fall apart, it lowers the frame rate or resolution one step at a time and tells you below the result.
Things to know
Everything runs on your device, so the file is never uploaded, but that also means it uses your hardware heavily. Videos up to 3 minutes are accepted, and phones are much slower than computers. Keep the screen on while it works, because it stops if the screen turns off.
A video that is already heavily compressed has little room left. If it cannot be made smaller than the original, the tool says so. Try lowering the resolution or trimming to the part you need instead.
Frequently asked questions
Why is the result an MP4 instead of an AVI?
AVI is a container from the 1990s, and the video codecs inside it (DivX, Xvid and other MPEG-4 Part 2 variants) are just as old. At the same quality, an H.264 MP4 is usually less than half the size, so saving as MP4 gets you a much smaller file than re-compressing to AVI, and it plays directly on phones and TVs.
Does it shrink by exactly the percentage I chose?
The tool subtracts the audio's share from the target size, sets the video bitrate to land slightly under it, and encodes. Long scenes with a lot of motion can come out a little larger, and the tool tells you below the result when that happens. If the video is already heavily compressed and cannot be made smaller than the original, no file is saved and the tool says so.
How much quality is lost?
At 20 to 40 percent, the difference is often hard to see on a phone screen. At 60 to 80 percent, dark scenes and fast motion start to look rough. If hitting the target would make the picture too blocky, the tool lowers the resolution one step at a time (for example 1080p to 720p) and tells you below the result.
Why does it take so long? Does it work on a phone?
The video is re-encoded frame by frame on your device rather than on a server, so it can take several times the length of the video depending on your hardware. It works on a phone but much more slowly, and it stops if the screen turns off or you switch apps. For long videos, use Chrome or Edge on a computer.