Convert MP4 to AVI, Free
Upload your MP4 file and get a AVI in seconds. No account, no watermark.
How to convert MP4 to AVI
AVI is an older Microsoft video container that predates MP4, but it remains in use with certain hardware media players, older DVD authoring software, and legacy editing pipelines that require it. Converting MP4 to AVI packages the video in the AVI container format so these older systems can process or play it.
BoltConverter converts MP4 to AVI on its servers. The video is re-encoded to a codec compatible with AVI players. Be aware that AVI files are generally larger than equivalent MP4 files and the format has technical limitations compared to MP4.
Upload your MP4 file
Click the upload area or drag your .mp4 file onto the converter. Files up to 100 MB are supported.
Server converts to AVI
BoltConverter re-encodes the MP4 video into an AVI container on its servers.
Wait for encoding
Re-encoding takes a few moments. A progress indicator shows the status.
Download the AVI
Click Download to save the AVI file. Your MP4 is removed from the server after conversion.
Frequently asked questions
Why would I convert MP4 to AVI?
AVI is needed for some older hardware media players, automotive entertainment units, DVD authoring tools, and legacy video editing software that does not support MP4. Most modern use cases are better served by keeping the MP4.
Will there be quality loss?
Yes. The conversion re-encodes the video, which introduces a small generational quality loss. For most viewing purposes the difference is not noticeable.
Why is the AVI file larger than the MP4?
AVI does not benefit from the same efficient compression algorithms as modern H.264 MP4. The same video content in AVI is typically 2-3 times the size of the MP4.
Is there a size limit?
BoltConverter accepts files up to 100 MB.
Are my files private?
Files are uploaded over HTTPS and deleted from the server immediately after conversion.