Convert MKV to AAC

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You can convert MKV to AAC for free: upload your MKV above and Flippy extracts the audio as AAC in your browser, no signup needed.

Turning MKV into AAC isn't really a conversion: it's an extraction: Flippy lifts the audio track out of your MKV and re-packs it on its own. You keep the sound and drop the pixels, swapping an MKV that runs as big as whatever you put inside: movie files often run to several gigabytes for an AAC built for streaming-grade sound at friendly file sizes.

Why flip MKV to AAC

MKV is the format that hoards: video, a dozen audio tracks and every subtitle, all in one box. It was born in 2002, the open-source Matroska project, and its real weak spot is playing on TVs, iPhones and editors that never learned to open the box.

AAC is MP3's better-trained successor: cleaner sound from the same number of bits. Advanced Audio Coding: the default soundtrack of YouTube, iTunes and most MP4 video. That makes it the right destination when what you need is streaming-grade sound at friendly file sizes.

How to convert MKV to AAC

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

MKV vs AAC, side by side

	MKV	AAC
Born	2002, the open-source Matroska project	1997, an MPEG all-star team: Fraunhofer, Dolby, Sony, AT&T and Nokia
Type	video · container	audio · lossy
Best for	high-quality rips and archives with multiple audio and subtitle tracks	streaming-grade sound at friendly file sizes
Weak spot	playing on TVs, iPhones and editors that never learned to open the box	older or stubborn hardware that only ever learned MP3
Typical size	as big as whatever you put inside: movie files often run to several gigabytes	similar to MP3, but it sounds better at the same bitrate: or the same at about 25% smaller
Plays on	VLC and desktop players love it; smart TVs, Apple devices and editors often don't.	Apple everything, YouTube, Android, modern players; patchy on legacy gear.

Questions people ask

Will converting MKV to AAC lose quality?

No: extraction copies the audio that's already in the MKV. Whatever the soundtrack sounded like inside the video, that's what your AAC will sound like.

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

Much smaller: you're keeping the audio and dropping the video, which is most of the weight. Expect similar to MP3, but it sounds better at the same bitrate: or the same at about 25% smaller.

Where will the AAC file play?

Apple everything, YouTube, Android, modern players; patchy on legacy gear. That's the usual reason people leave MKV behind: AAC simply opens in more of the places that matter.

How long does MKV to AAC 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

Change MKV format AAC conversion Shrink AAC Cut AAC Combine AAC Boost AAC volume MKV to GIF Audio extractor