Video ToolsFree

MKV to MP4

Convert MKV (Matroska) video files to MP4 format for broader device compatibility. MKV is excellent for archiving but isn't supported natively on iPhone, Apple TV, or many Smart TVs. MP4 works everywhere. Video stream is copied without re-encoding when possible. No signup.

Updated June 2026

  1. 1Upload your MKV video
  2. 2Conversion runs instantly
  3. 3Download your MP4 file

Drop your video anywhere, click to browse

MP4, MOV, AVI, MKV, WebM, FLV, WMV, VOB

Ctrl+Vto paste a copied file

How to use MKV to MP4

  1. 1

    Upload your MKV video

    Drag and drop your MKV file into the upload area, or click to browse and select it from your device. Nothing is sent to a server.

  2. 2

    Conversion runs instantly

    ToolBubble converts the video to MP4 directly in your browser — no waiting in an upload queue.

  3. 3

    Download your MP4 file

    Once processing finishes, the converted MP4 file downloads automatically to your device.

Frequently asked questions

Everything you need to know about mkv to mp4.

No — when the MKV's video track uses H.264 or H.265, the stream is copied directly into the MP4 container without re-encoding. Zero quality loss.

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