audio in, MKV out: free, no signup, and both files delete themselves within an hour.
One file at a time for now
Batch processing isn't available yet: drop files one by one, or use the Merger to join them.
Try another fileFlippy turns audio into MKV for free: upload the audio above and download it wrapped as MKV, sound untouched. No signup, and both files delete themselves within an hour.
It sounds backwards, but audio to MKV is a real need: plenty of platforms and tools only accept video, so Flippy re-packs your audio audio inside an MKV wrapper. Where MKV accepts your audio's codec the sound crosses over untouched; where it doesn't, it's re-encoded once. The MKV that comes out is built for high-quality rips and archives with multiple audio and subtitle tracks.
A classic audio to MKV job: voice memos, downloads and session exports, bound for the archive, with every audio and subtitle track kept.
Whatever the recording, audio just wants to be heard: the trick is picking a shape that plays where you need it. It comes from wherever your camera, screen recorder or download made it.
MKV is the format that hoards: video, a dozen audio tracks and every subtitle, all in one box. The Matroska container: it will hold practically any codec ever made. That makes it the right destination when what you need is high-quality rips and archives with multiple audio and subtitle tracks.
Drop your audio file into the flipper above, or click to browse for it.
Check the output format: MKV is already selected for you.
Hit Convert, give it a moment, then download your new MKV.
Settings for audio to MKV: none to pick. Where the MKV container accepts your audio's audio codec, the stream is copied bit for bit; where it doesn't, Flippy re-encodes it once and leaves the levels alone.
| audio | MKV | |
|---|---|---|
| Born | wherever your microphone, DAW or download came from | 2002, the open-source Matroska project |
| Type | audio · any format | video · container |
| Best for | any sound file: music, voice memos, podcasts, session exports | high-quality rips and archives with multiple audio and subtitle tracks |
| Weak spot | nothing in particular; the limits belong to whichever format it happens to be wearing | playing on TVs, iPhones and editors that never learned to open the box |
| Typical size | anywhere from tiny voice notes to studio-sized masters | for video content, as big as whatever you put inside: movie files often run to several gigabytes; wrapping audio alone stays about the size of the audio |
| Plays on | Depends entirely on the format it lands in. | VLC and desktop players love it; smart TVs, Apple devices and editors often don't. |
No. Wrapping audio in an MKV container doesn't touch the sound itself: it's the same stream in a different box.
About the same, plus a sliver of container overhead. The audio stream is unchanged; MKV just adds a video-shaped envelope.
VLC and desktop players love it; smart TVs, Apple devices and editors often don't. That's the usual reason people leave audio behind: MKV simply opens in more of the places that matter.
Seconds for most audio files: there are no pictures to encode, so wrapping the audio as MKV is nearly as fast as copying it. Both files auto-delete within an hour.