How do I convert MKV to MP4?

Drop your MKV file onto the converter above, make sure MP4 is selected, and click Convert. When it's done, download the MP4 file — it usually takes a few seconds.

Is it safe to convert MKV to MP4 here?

Yes. MKV to MP4 conversion happens entirely inside your browser using WebAssembly, so your file is never uploaded to any server.

Is the MKV to MP4 converter free?

Yes — free with no watermark. Signed-out visitors can convert 25 files a day, and a free account raises that to 250.

Will converting MKV to MP4 reduce quality?

MP4 is a lossy format, but our defaults are tuned to be visually indistinguishable for most files. You can raise the quality under Options.

Can I convert multiple MKV files at once?

Yes. Add up to 5 files at a time without an account, 10 with a free account and up to 500 on paid plans, then download them individually or as a single ZIP.

Can I convert MP4 back to MKV?

Yes — use our MP4 to MKV converter. Note that converting back and forth between formats can't recover detail lost to lossy compression.

MP4→MKV MOV→MP4 MKV→MP3 GIF→MP4 MKV→WebP WebM→MP4 MKV→MOV MKV→GIF AVI→MP4 MKV→WAV WMV→MP4 MKV→WebM MKV→M4A MKV→AVI MKV→FLAC MKV→AAC MKV→OGG MKV→WMV MKV→Opus MKV→M4V MKV→FLV MKV→MPEG MKV→3GP MKV→WMA MKV→TS MKV→MPG MKV→AIFF MKV→AMR MKV→VOB MKV→M4B M4V→MP4 3GP→MP4 FLV→MP4 MPEG→MP4 TS→MP4 MPG→MP4 MTS→MP4 VOB→MP4 M2TS→MP4 APNG→MP4 OGV→MP4 MXF→MP4 DivX→MP4 3G2→MP4 RM→MP4 RMVB→MP4 F4V→MP4 ASF→MP4 PNG→JPG JPG→PNG PNG→WebP JPG→WebP WebP→PNG WebP→JPG HEIC→PNG HEIC→JPG MP4→MP3 PNG→JPEG JPG→JPEG JPEG→PNG JPEG→JPG PNG→PDF JPG→PDF PDF→PNG PDF→JPG HEIC→WebP MP4→WebP PDF→DOCX DOCX→PDF JPEG→WebP WebP→JPEG PNG→GIF JPG→GIF GIF→PNG GIF→JPG MP4→MOV WebP→PDF HEIC→JPEG WebP→GIF GIF→WebP HEIC→PDF MP3→WAV WAV→MP3 JPEG→PDF PDF→JPEG SVG→PNG SVG→JPG HEIC→GIF MOV→MP3 MP4→GIF JPEG→GIF GIF→JPEG PNG→AVIF JPG→AVIF AVIF→PNG AVIF→JPG MP3→M4A M4A→MP3 GIF→PDF SVG→PDF PNG→SVG JPG→SVG PDF→SVG SVG→WebP MOV→WebP MP4→WAV MP4→WebM WebP→AVIF AVIF→WebP WebP→SVG SVG→JPEG MKV→MP4 HEIC→AVIF MP4→M4A JPEG→AVIF AVIF→JPEG JPEG→SVG MOV→GIF GIF→MOV WebM→MP3 AVIF→PDF MP3→FLAC FLAC→MP3 MP4→AVI GIF→AVIF AVIF→GIF SVG→GIF GIF→SVG WebM→WebP MOV→WAV XLSX→PDF CSV→PDF EPUB→PDF PDF→EPUB MOV→WebM WebM→MOV PNG→ICO JPG→ICO ICO→PNG ICO→JPG MP3→AAC WAV→M4A AAC→MP3 M4A→WAV MP4→FLAC AVI→MP3 MOV→MKV MOV→M4A DOCX→EPUB EPUB→DOCX CSV→DOCX PDF→TXT DOC→PDF TXT→PDF WebP→ICO ICO→WebP PPTX→PDF AVI→WebP WebM→GIF GIF→WebM

MKVMP4

Convert MKV to MP4

Free and private: MKV files are converted in your browser on computers; on phones, in our fast cloud and deleted automatically.

In your browser (fast cloud on phones)
No watermark
Batch & ZIP download

Need a smaller MKV? Compress MKV

How to convert MKV to MP4

1
Add your MKV files
Drag and drop MKV files onto the converter, paste them, or click to browse. You can add several at once.
2
Choose MP4
MP4 is already selected. Open Options if you want to change quality, size or metadata.
3
Convert
Click Convert. Your files are converted right in your browser in seconds.
4
Download your MP4
Download each MP4 file, or everything at once as a ZIP.

MKV vs MP4

From

MKV · Matroska Video

MKV is a flexible open container that can hold unlimited video, audio and subtitle tracks in nearly any codec.

Type: Video
Extension: .mkv
MIME: video/x-matroska
Best for: movies and series with multiple audio and subtitle tracks

Open standard

All MKV conversions →

MP4 · MPEG-4 Part 14

MP4 is the most widely supported video container. It usually holds H.264 or H.265 video with AAC audio and plays on every device and platform.

Type: Video
Extension: .mp4
MIME: video/mp4
Best for: sharing, streaming and uploading video anywhere

Lossy compressionOpen standard

All MP4 conversions →

Need it the other way around? Convert MP4 to MKV.

MKV to MP4: frequently asked questions

Free, private and in your browser