LOCAL MKV TO MP4 CONVERTER

Convert MKV to MP4

Select an MKV and the compatibility engine first creates a local editable MP4. You can then trim, resize, add text and export—nothing is uploaded.

✓ No upload✓ No account required✓ Start immediately after selecting a video
▶
Drop your video hereMP4, MOV, WebM, WMV, and moreor● Nothing is uploaded
01

How to use this preset

  1. Choose an MKV file from your device.
  2. Wait for the one-time local compatibility conversion, then preview the video.
  3. Apply edits and export an H.264/AAC MP4.
02

When to use this preset

  • Making an MKV recording easier to share.
  • Editing an MKV in a browser that cannot play it directly.
  • Creating an MP4 copy while keeping the original file untouched.
03

Check before you share

The initial MKV decode and final MP4 encode both use device memory. For very large files, close other tabs and test a short section first.

Your source video stays on this device.
Creator toolsEverything stays local
⇣Compress videoOpen dedicated tool→25Compress to 25MBOpen dedicated tool→◉Edit your YouTube videoOpen dedicated tool→▥Resize for ShortsOpen dedicated tool→
01Truly local processingFile APIs, WebCodecs, and WebAssembly all run in your browser.
02Every feature is freeNo file-size limit, with up to 4K, batch, and advanced tools.
03No server copyNo video upload endpoint and no account required.