Does this mkv to mp4 converter keep subtitles?

No. Subtitle tracks are not carried over in this version, and extra audio tracks are dropped too — only the main picture and main audio convert.

Why does conversion take a while?

Because the tool fully re-encodes the picture rather than just swapping the container. Longer videos take longer; the progress bar shows how far it has got.

Will converting lose quality?

A little, unavoidably. Re-encoding is lossy, but at normal viewing sizes the difference is usually hard to spot.

What if my MKV has several audio languages?

Only the main audio track converts. If you need another language track, pick a tool that keeps multiple tracks.

Is this mkv to mp4 converter free?

Yes. It runs entirely in your browser — no account, no signup, and nothing uploaded.

MKV to MP4 Converter – MKV Files for Phones and TVs

MKV is a flexible container that can hold almost anything, which is exactly why so many players choke on it. Phones, TVs and editors often refuse MKV files outright. This free mkv to mp4 converter turns your MKV into a MP4 in your browser, so the file never leaves your device and no signup is needed. The MP4 copy keeps the same picture and sound, in a container every device understands. The honest limits: subtitles and extra audio tracks may not carry over, so check the result if your MKV has them.

How to use this mkv to mp4 converter

From a MKV file to a MP4 file, without uploading anything.

1Drop in your MKV file

Choose a .mkv file from your device, or drag it onto the tool.

2Let it encode in the browser

Your video is converted locally to H.264 video with AAC audio, so it never leaves your device.

3Download the MP4 file

The converted file downloads with the same base name and the new extension, ready to use.

Why convert MKV to MP4

MKV is a flexible container that can hold almost anything, which is exactly why so many players choke on it. Phones, TVs and editors often refuse MKV files outright.

The right format for the job

MKV is a flexible container that can hold almost anything, which is exactly why so many players choke on it. Phones, TVs and editors often refuse MKV files outright.

What MP4 gives you

A file that plays on every phone, TV and browser, and drops straight into any editor without transcoding first.

Watch out for this

Subtitles and extra audio tracks may not carry over, so check the result if your MKV has them.

Private by design

Decoding and encoding happen on your own device, so personal videos and unpublished work never leave your browser.

MKV to MP4 Converter FAQs

Short, direct answers to the questions readers ask most.

Yes, at the same quality. The picture and sound are carried over into the MP4 container without re-grading or cropping.

MKV is a flexible container that can hold almost anything, which is exactly why so many players choke on it. Phones, TVs and editors often refuse MKV files outright.

MP4 is the most widely supported video container, pairing H.264 video with AAC audio for broad compatibility.

Subtitles and extra audio tracks may not carry over, so check the result if your MKV has them.

Yes. It runs entirely in your browser, with no account, no signup, and nothing uploaded.