Convert AVI to MP4

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Converting AVI to MP4 is free: drop your AVI above, hit convert, and download the MP4. Files delete themselves within an hour.

Most AVI to MP4 conversions are wrapper swaps: the pictures stay pictures, they just trade AVI's box for one built for playing everywhere: browsers, phones, TVs, editors, slide decks. If the codec inside your AVI is one MP4 accepts, Flippy keeps quality bit-for-bit identical; if not, it re-encodes once, carefully, at matching quality.

Why flip AVI to MP4

AVI is the veteran of desktop video: dependable in 1995, cranky about everything invented since. It was born in 1992, Microsoft, and its real weak spot is modern life: no proper streaming, no subtitles, no love for modern codecs.

MP4 is the world's default video: the file that plays before anyone has to think about it. A container, most often carrying H.264 or H.265 video with AAC audio. That makes it the right destination when what you need is playing everywhere: browsers, phones, TVs, editors, slide decks.

How to convert AVI to MP4

1
Drop your AVI file into the flipper above, or click to browse for it.
2
Check the output format: MP4 is already selected for you.
3
Hit Convert, give it a moment, then download your new MP4.

AVI vs MP4, side by side

	AVI	MP4
Born	1992, Microsoft	2001, the MPEG standards group, built on Apple's QuickTime design
Type	video · container	video · container
Best for	opening old archives and humoring legacy Windows tools	playing everywhere: browsers, phones, TVs, editors, slide decks
Weak spot	modern life: no proper streaming, no subtitles, no love for modern codecs	very little day to day: as a container its quality depends on the codec inside
Typical size	usually bulky: its era's codecs compress far less than H.264 or H.265	roughly 50–100 MB per minute at 1080p, depending on bitrate
Plays on	Old Windows software and desktop players; phones and browsers mostly refuse.	Every browser, phone, TV and editing app worth mentioning.

Questions people ask

Will converting AVI to MP4 lose quality?

Usually not: when the video codec is compatible, Flippy swaps the container without re-encoding, so quality is untouched. If a re-encode is needed, it happens once at matching quality.

Will the MP4 file be bigger or smaller than my AVI?

Similar, unless a re-encode is involved: then it depends on the codec. MP4 typically runs roughly 50–100 MB per minute at 1080p, depending on bitrate.

Where will the MP4 file play?

Every browser, phone, TV and editing app worth mentioning. That's the usual reason people leave AVI behind: MP4 simply opens in more of the places that matter.

How long does AVI to MP4 conversion take?

When it's a pure container swap it's nearly instant, since nothing is re-encoded. Full re-encodes take roughly as long as the video plays, often less.

More ways to handle these formats

Change AVI format MP4 Converter MP4 size reducer MP4 Cutter Remove sound from MP4 Extract a frame from MP4 AVI Rotator