VideoHop
UNIVERSAL MEDIA CONVERTER

MP4 to MKV Converter

Convert MP4 into MKV when you prefer the flexible Matroska container for local media workflows.

MP4MOVMKVWebMMP3WAVFLAC+ more
✓ No signup✓ Batch up to 3✓ Auto cleanup
Converter readyUp to 400 MB per request • 250 MB per file
250 MB per file400 MB per request45 min max video~30 min auto-delete
Popular:
Output quality
Smart output: MP4Best overall compatibility for video playback and sharing.
Size depends on source
Advanced settingsFine-tune the output
✓ Format-aware settings✓ Live queue progress✓ Files expire after ~30 min
RELATED CONVERTERS

More Useful Conversion Paths

Explore closely related formats without digging through a giant list of every theoretical combination.

AVI → MKVConvert AVI video to MKV for playback, editing, sharing or compatibility with another media workflow. FLV → MKVConvert FLV video to MKV for playback, editing, sharing or compatibility with another media workflow. M4V → MKVConvert M4V video to MKV for playback, editing, sharing or compatibility with another media workflow. MOV → MKVConvert MOV video to MKV for playback, editing, sharing or compatibility with another media workflow. MP4 → 3GPConvert MP4 video to 3GP for playback, sharing, editing or compatibility with software and devices. MP4 → AVIConvert MP4 into AVI for older software, devices or legacy workflows. MP4 → FLVConvert MP4 video to FLV for playback, sharing, editing or compatibility with software and devices. MP4 → GIFTurn a short MP4 video clip into an animated GIF for simple visual sharing.
FORMAT SUPPORT

Video, Audio and Video-to-Audio Conversion

The same FFmpeg-powered engine handles common media workflows without forcing every user through technical codec menus.

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Video Converter

Convert MP4, MOV, MKV, AVI, WebM and other common video files to MP4, MOV, MKV, WebM, AVI or GIF.

MP4MOVMKVWEBMAVIGIF
♫

Audio Converter

Change MP3, WAV, FLAC, AAC, M4A, OGG, OPUS and other audio files into the format your player or workflow requires.

MP3WAVFLACAACM4AOGGOPUS
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Extract Audio

Upload a video and create MP3, WAV, FLAC, AAC, M4A, OGG or OPUS audio without keeping the video stream.

MP4 → MP3MOV → WAVMKV → FLAC
MP4 TO MKV GUIDE

Why Convert MP4 to MKV?

Convert MP4 into MKV when you prefer the flexible Matroska container for local media workflows.

Recommended starting pointMKV is useful for flexible playback workflows, while MP4 remains safer for broad device compatibility.
INPUT

MP4

A widely supported multimedia container used for web video, phones, TVs, presentations and general sharing.

Broad playback compatibility and everyday video delivery.
OUTPUT

MKV

A flexible Matroska container that can hold high-quality video, multiple audio tracks and subtitle streams.

Rich local media files and flexible track support.

How to convert MP4 to MKV

  1. Upload your MP4 file above.
  2. Keep MKV selected as the output.
  3. Choose Balanced quality unless your workflow needs another setting.
  4. Open Advanced settings only if you need trimming, resolution, bitrate, sample rate or a custom filename.
  5. Start the conversion and download the finished file when it is ready.
Before you convert

Re-encoding can change quality and file size even when the extension stays familiar. Some phones, TVs and editing apps have less consistent MKV support than MP4.

Changing a container or codec cannot recreate quality already missing from the source, so keep an important original when possible.

Explore MP4 conversionsExplore MKV conversions