editvideo.tools / tools / MKV to MP4 Converter
Tool · Convert
MKV to MP4 Converter
Convert MKV to MP4 online free — fix playback on TVs, phones and editors that reject MKV. No upload, no watermark, quality untouched.
Drop a video here
MP4, WebM, MOV, MKV — anything your browser can decode.
PRIVATE BY DESIGN — PRIVATE BY DESIGN — decoding, processing and encoding all run in your browser's engine. No server sees your file.
How to Convert MKV to MP4
Drop your MKV file, pick MP4 and download. MKV is a flexible movie container — MP4 is what phones, TVs and social apps expect. Quality stays untouched when codecs match.
Tip: if your MKV carries subtitles or multiple audio tracks, only the default streams carry over — MP4 supports fewer track types than MKV.
FORMATS
Common conversion pairs
MP4 → WebM
MP4 to WebM is perfect for the web — WebM compresses well and plays natively in all modern browsers. Same codec? Instant lossless swap; otherwise a fast re-encode.
MOV → MP4
MOV to MP4 is the most common swap: iPhone and camera MOV files play everywhere once converted. Fast lossless copy when the codec matches.
MKV → MP4
MKV to MP4 fixes compatibility: TVs, phones and editors often reject MKV. Quality is untouched — conversion runs entirely in your browser.
WebM → MP4
WebM to MP4 for sharing: messaging apps and older players expect MP4. Re-encode keeps quality with a universal format.
MP4 → MOV
MP4 to MOV for editing workflows: Final Cut and some NLEs prefer MOV. Lossless container swap when the codec already matches.
MP4 → MKV
MP4 to MKV for archiving: MKV handles subtitles, chapters and multiple audio tracks. Lossless container swap on matching codecs.
FAQ
Frequently asked questions
Is MKV to MP4 Converter really free?
Yes — completely free, with no hidden fees, no premium tier and no signup required. The tool runs entirely in your browser.
Do I need to install anything to use MKV to MP4 Converter?
No. MKV to MP4 Converter works directly in your browser. There is no software to install, no app to download and no plugin required.
Is my video uploaded to a server when I use MKV to MP4 Converter?
Never. All processing happens locally on your device. Your file never leaves your computer, which is why there is no upload wait and no privacy risk.
Which video formats does MKV to MP4 Converter support?
It accepts MP4, WebM, MOV and MKV — anything your browser can decode. Output is MP4 by default, playable on any device.
What happens to my file after processing?
Nothing is stored anywhere. Once you close the tab, everything is gone. We have no server, no storage and no access to your files.
Will my video have a watermark?
No — every download is 100% watermark-free. EditVideo never adds logos, branding or watermarks to your files.
Why won't my TV or phone play MKV files?
MKV is an open movie container that many consumer devices don't officially support. Converting to MP4 — the universal format — fixes playback everywhere without touching quality.
Do I lose subtitles or audio tracks when converting MKV to MP4?
The default video and audio streams carry over fully. Extra tracks (commentaries, secondary languages, subtitles) don't — MP4 supports fewer track types than MKV.