Convert AAC to MP4

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Flippy turns AAC into MP4 for free: upload the AAC above and download it wrapped as MP4, sound untouched.

It sounds backwards, but AAC to MP4 is a real need: plenty of platforms and tools only accept video, so Flippy re-packs your AAC audio inside an MP4 wrapper. Nothing is re-recorded: the sound in your AAC crosses over untouched, and the MP4 that comes out is built for playing everywhere: browsers, phones, TVs, editors, slide decks.

Why flip AAC to MP4

AAC is MP3's better-trained successor: cleaner sound from the same number of bits. It was born in 1997, an MPEG all-star team: Fraunhofer, Dolby, Sony, AT&T and Nokia, and its real weak spot is older or stubborn hardware that only ever learned MP3.

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 AAC to MP4

1
Drop your AAC 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.

AAC vs MP4, side by side

	AAC	MP4
Born	1997, an MPEG all-star team: Fraunhofer, Dolby, Sony, AT&T and Nokia	2001, the MPEG standards group, built on Apple's QuickTime design
Type	audio · lossy	video · container
Best for	streaming-grade sound at friendly file sizes	playing everywhere: browsers, phones, TVs, editors, slide decks
Weak spot	older or stubborn hardware that only ever learned MP3	very little day to day: as a container its quality depends on the codec inside
Typical size	similar to MP3, but it sounds better at the same bitrate: or the same at about 25% smaller	roughly 50–100 MB per minute at 1080p, depending on bitrate
Plays on	Apple everything, YouTube, Android, modern players; patchy on legacy gear.	Every browser, phone, TV and editing app worth mentioning.

Questions people ask

Will converting AAC to MP4 lose quality?

No. Wrapping audio in an MP4 container doesn't touch the sound itself: it's the same stream in a different box.

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

About the same, plus a sliver of container overhead. The audio stream is unchanged; MP4 just adds a video-shaped envelope.

Where will the MP4 file play?

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

How long does AAC to MP4 conversion take?

It scales with length and resolution: short clips finish in seconds, long HD videos can take a few minutes. Files auto-delete within an hour after.

More ways to handle these formats

AAC Converter Change MP4 format Reduce MP4 file size MP4 Cutter Remove sound from MP4 Extract a frame from MP4 AAC volume booster