Convert MP3 to MKV

MP3 in, MKV out: free, no signup, and both files delete themselves within an hour.

Drop your file here to upload

MP3 MKV

Drop your MP3 here

Pick the video format you need: free, private, gone in an hour.

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Video Formats

MP4 (.mp4)

MOV (.mov)

AVI (.avi)

GIF (.gif)

3GP (.3gp)

FLV (.flv)

M4V (.m4v)

MK3D (.mk3d)

MOOV (.moov)

MPA (.mpa)

MPE (.mpe)

MPEG (.mpeg)

MPG (.mpg)

MXF (.mxf)

QT (.qt)

VOB (.vob)

WEBA (.weba)

Audio Formats

MP3 (.mp3)

WAV (.wav)

M4A (.m4a)

AAC (.aac)

FLAC (.flac)

OGG (.ogg)

AIF (.aif)

AIFC (.aifc)

AIFF (.aiff)

AMR (.amr)

AU (.au)

CAF (.caf)

DSS (.dss)

GSD (.gsd)

GSM (.gsm)

M2V (.m2v)

MP2 (.mp2)

MPGA (.mpga)

MTS (.mts)

MUS (.mus)

OGA (.oga)

OGV (.ogv)

OGX (.ogx)

RM (.rm)

SWF (.swf)

TS (.ts)

WEBM (.webm)

WMA (.wma)

WMV (.wmv)

XSPF (.xspf)

Free, no signup
No watermark, ever
Files auto-delete in 1 hour
Nothing to install

Flippy turns MP3 into MKV for free: upload the MP3 above and download it wrapped as MKV, sound untouched. No signup, and both files delete themselves within an hour.

It sounds backwards, but MP3 to MKV is a real need: plenty of platforms and tools only accept video, so Flippy re-packs your MP3 audio inside an MKV wrapper. Where MKV accepts your MP3'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 MP3 to MKV job: voice memos, podcast episodes and music downloads, bound for the archive, with every audio and subtitle track kept.

Why flip MP3 to MKV

MP3 is the format that taught music to travel: small, scrappy, and welcome absolutely everywhere. It was born in 1993, Fraunhofer Institute, Germany, and its real weak spot is holding fine detail at low bitrates: it stays small by quietly discarding sound.

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.

How to convert MP3 to MKV

1
Drop your MP3 file into the flipper above, or click to browse for it.
2
Check the output format: MKV is already selected for you.
3
Hit Convert, give it a moment, then download your new MKV.

Best settings for MP3 to MKV

Settings for MP3 to MKV: none to pick. Where the MKV container accepts your MP3's audio codec, the stream is copied bit for bit; where it doesn't, Flippy re-encodes it once and leaves the levels alone.

MP3 vs MKV, side by side

	MP3	MKV
Born	1993, Fraunhofer Institute, Germany	2002, the open-source Matroska project
Type	audio · lossy	video · container
Best for	playing on anything with a speaker, from new phones to twenty-year-old car stereos	high-quality rips and archives with multiple audio and subtitle tracks
Weak spot	holding fine detail at low bitrates: it stays small by quietly discarding sound	playing on TVs, iPhones and editors that never learned to open the box
Typical size	about 1 MB per minute at 128 kbps: roughly a tenth of CD audio	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 MP3
Plays on	Everything. Phones, browsers, cars, smart speakers, ancient iPods.	VLC and desktop players love it; smart TVs, Apple devices and editors often don't.

Questions people ask

Will converting MP3 to MKV lose quality?

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

Will the MKV file be bigger or smaller than my MP3?

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

Where will the MKV file play?

VLC and desktop players love it; smart TVs, Apple devices and editors often don't. That's the usual reason people leave MP3 behind: MKV simply opens in more of the places that matter.

How long does MP3 to MKV conversion take?

Seconds for most MP3 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.

More ways to handle these formats

Change MP3 format MKV conversion Shrink MKV MKV Cutter Remove sound from MKV Extract a frame from MKV Combine MP3