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Free tools › Audio and video

MKV to MP4

The container downloads and rips come in, into the one every device opens.

This one runs on your credits. The container downloads and rips come in, into the one every device opens.

Sign in and get 500 free credits every month — enough for many files — then drop the file in the workbench and run mkv to mp4 there.

Pick a file below to see exactly what it would cost.

Sign in and run it — free credits included

More free conversions, where you upload. The Fylane extension does the same work inside any upload form, on its own free share every day.About the extension

How to convert MKV to MP4

  1. Drop the video.
  2. Nothing to choose.
  3. Press Convert and download the MP4.

What happens to your file

The video is decoded and re-encoded as H.264 with AAC sound in a fast-start MP4 — the one file phones, TVs, Windows, Macs and every browser play — at a quality most people cannot tell from the original.

Subtitle tracks inside the MKV are not carried over; extract them first if you need them.

Questions

Why will my TV not play MKV?

MKV is a container many players never learned; the video inside is usually fine. MP4 holds the same picture in a wrapper everything reads.

Do this in code

curl -X POST https://api.fylane.dev/v1/jobs \
  -H "Authorization: Bearer $FYLANE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "file_id": "<file id>",
    "operation": "video.convert",
    "options": {}
  }'

The same operation, video.convert — Anything playable becomes H.264+AAC in a faststart MP4 — or, by `container`, MOV, MKV, or VP9+Opus WebM. Upload first with the quickstart; every option is on the operations page. 500 free credits a month, then $5 per thousand.