Convert MKV to MP4
MKV is a flexible container popular for films and screen recordings, but many phones, editors and social sites refuse it. MP4 with H.264 plays on practically every phone, browser, TV and social network. Upload the file, choose MP4 and download the result — nothing to install.
Drop a file hereor click to choose one — it opens in the studio with this tool ready. Small files need no account.Choose a fileHow it works
- 1Upload your MKV file.
- 2Open the video converter and choose MP4 as the format.
- 3Download the MP4 file.
What you get
Codec control
H.264, H.265 or VP9 for video, AAC, MP3 or Opus for audio — or copy a stream as it is, which is fast and lossless when MP4 supports it.
Large files over the API
Files above 100 MB go straight to storage through a signed upload URL, then into the same conversion.
Same result in your code
What you run here is one multipart request over the API, with a webhook when the job is done.
Pay for processing time
One tariff for every operation, capped per file. A failed job is refunded automatically.
Same thing over the API
One header, one multipart request with the file, then poll the job or take a webhook. The same operation you just tried in the browser.
Questions
Will converting MKV to MP4 lose quality?
Re-encoding always changes the data a little; the default settings keep it visually close. If the codecs inside your MKV are allowed in MP4, choose “copy” to change only the container — nothing is re-encoded.
Is there a size or length limit?
Limits depend on your plan and are listed on the pricing page. A video that is too long is refused up front rather than cut off, and a refused file costs nothing.
Do I need an account?
Small files can be converted without signing up. An account adds a daily free allowance and an API key.
Can I automate it?
Yes. Send the file to the API with service “clipconvert” and operation “convert”, set the format to mp4, then poll the job or take a webhook.