Drop in an AVI from an older camera, a capture card or legacy software and get an MP4 back, the format phones and modern editors actually open.
WEBM, MOV and MKV are in the list too. No account, no watermark.
By ShinobiTools Team · Last updated: October 2026
Every converter here is free, full size, no account. Photos convert in your browser and never leave it, except camera RAW files and SVG tracing. Those, like video, audio and e-books, need our server, and we delete them right after.
How to convert AVI to MP4: drop the AVI in, leave the menu on MP4, and the download starts when it's ready. The conversion runs on our server, so it works the same from a phone as from a computer, and there's no app to install.
No, and it's worth saying plainly. Converting only changes the container and codec; it cannot add detail a camera or capture card never recorded. If the source AVI is low resolution, blocky or faded, the MP4 keeps exactly that, just in a format that opens on modern devices.
Compatibility. AVI is an older Microsoft container, still produced by some older cameras, capture cards and legacy recording software. Modern phones, editors and upload forms increasingly don't open AVI at all, while MP4 keeps working almost everywhere.
A small amount beyond whatever the AVI already had, because the video is re-encoded with a standard high-quality setting rather than copied byte for byte. AVI files vary a lot in starting quality; the conversion can't improve on what was captured, only carry it forward in a format that opens more places.
1200 MB and 20 minutes per upload on the free tier. Video larger than 1080p comes back at 1080p. The file is processed on our own machine and deleted the moment the result is ready, whether the conversion succeeds or fails.
WEBM is smaller again and plays in every current browser. MOV is what Apple software and most editors prefer. MKV keeps everything you throw at it. MP4 stays the default here because it plays back on the widest range of devices.
Need a different format pair instead? Convert video format handles MP4, MOV, WEBM and more in one place. Only need to cut the clip down first? Trim a video keeps just the part that matters.
No. Re-encoding changes the container and codec, not the footage. If the original AVI is low resolution, blocky or faded, the MP4 keeps exactly that detail; conversion cannot add back anything the original recording never captured.
Compatibility. AVI is an older Microsoft container, still produced by some older cameras, capture cards and legacy software, and modern phones, editors and upload forms increasingly don't open it. MP4 is the format that still works almost everywhere.
A small amount beyond whatever the source already had, because the video is re-encoded with a standard high-quality setting rather than copied byte for byte.
1200 MB and 20 minutes per upload on the free tier. Video larger than 1080p comes back at 1080p. The file is processed on our server and deleted immediately after, whether the conversion succeeds or fails.
Yes: no account, no watermark, no daily limit.
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