MKV to MP4 Converter
Convert MKV to MP4 online in your browser. Create a widely compatible H.264 MP4 locally with no upload, account, or watermark.
Drop your MKV file here
or click to choose a file
MP4, MOV, AVI, MKV, WebM, WMV, MPG, VOB, TS, FLV, 3GP, HEVC and GIF
Conversion settings
MKV can store many video, audio, and subtitle streams, but it is not accepted everywhere. MP4 is usually the safer choice for phones, browsers, smart TVs, presentation software, and social platforms. This preset decodes the primary MKV video and audio streams and creates a broadly compatible H.264/AAC MP4. Embedded subtitle tracks and extra audio tracks are not carried into the simple MP4 output. Conversion remains local, which is useful for private recordings and large media files that would be slow to upload.
Free Video Converter for MP4, MOV, MKV, WebM and More
Zolkit's Video Converter changes video formats entirely inside your browser. Convert MOV to MP4, MKV to MP4, WebM to MP4, AVI to MP4, MP4 to WebM, video to GIF, and other common combinations without uploading the source to a server. FFmpeg WebAssembly uses your device's processor for private local conversion, while quality, resolution, and encoding controls let you choose between speed and file size.
Local and private
Video bytes stay on your device; conversion runs inside the browser tab with no media upload.
Fast encoding mode
The default fast preset uses more of your browser's available CPU to finish common conversions sooner.
Nine output formats
Export MP4, MOV, AVI, MKV, WebM, WMV, MPG, FLV, or an animated GIF from one converter.
Quality controls
Choose high quality, balanced output, or a smaller file and optionally cap resolution at 1080p, 720p, or 480p.
Preview before saving
Play compatible results or preview an animated GIF before downloading the converted file.
Free without watermarks
Convert videos without an account, subscription, queue, watermark, or server-side file limit.
How to Convert a Video Format
- 1
Drop a video onto the converter or click the upload area to choose MP4, MOV, AVI, MKV, WebM, WMV, MPG, VOB, TS, FLV, 3GP, HEVC, or GIF.
- 2
Choose an output format, quality, maximum resolution, and encoding mode. Fast and balanced settings work well for most videos.
- 3
Select Convert, keep the tab open while your browser processes the file, then preview and download the result.
Video Converter FAQ
Can I convert MKV to MP4 without VLC or HandBrake?
Yes. This converter uses FFmpeg WebAssembly in the browser, so no VLC, HandBrake, extension, or desktop installation is required.
Will MKV subtitles appear in the MP4?
The converter exports the primary video and audio streams and does not burn embedded subtitle tracks into the picture. Add subtitles separately after conversion if they are required.
Why is MP4 more compatible than MKV?
MP4 with H.264 and AAC has native support across browsers, mobile devices, televisions, editors, and messaging apps, while MKV support varies by application.
Can large MKV files be converted privately?
Yes, provided the browser has enough available memory. The file is processed locally and is not uploaded to Zolkit.