MKV to MP4
MKV to MP4 is a free online tool that converts MKV files to MP4 directly in your browser — no sign-up, no watermark, and no upload.
Free · unlimited · processed privately in your browser
or drag and drop a file here
Supported: MKV
Your files stay private — 100% in your browser
We never upload your files, photos, or videos to any server. Everything is processed directly in your browser, so your data never leaves your device. That means zero privacy worries — no one else can ever see or store what you convert.
- No uploads
- Processed on your device
- No sign-up needed
About MKV to MP4
MKV to MP4 converts your MKV files to MP4 for free, right in your browser. MKV is a flexible container that can carry multiple audio and subtitle tracks, so converting MKV to MP4 produces the most universally compatible video file — it plays on practically any phone, browser, or player. There is no sign-up, no watermark, and no limit on how many files you can convert. The whole process happens on your own device using your browser, so your media is never uploaded and nobody else can access it.
After you upload
MKV to MP4 needs no settings — the conversion starts as soon as you run it and finishes in your browser, so nothing is uploaded.
How to use MKV to MP4
- 1Click Choose Files and select the MKV file you want to convert.
- 2The tool reads your MKV file and prepares it for conversion.
- 3Press Run to convert it to MP4 directly in your browser — nothing is uploaded.
- 4Download your new MP4 file instantly.
Frequently asked questions
What is MKV?
A flexible open container that can hold many video, audio, and subtitle tracks in one file.
What is MP4?
The most widely compatible video container, playable on virtually every device and platform.
Why convert MKV to MP4?
MKV is a flexible container that can carry multiple audio and subtitle tracks, so converting MKV to MP4 produces the most universally compatible video file — it plays on practically any phone, browser, or player.
Will converting MKV to MP4 reduce the quality?
Both MKV and MP4 are lossy. Converting re-encodes the file, which can lose a small amount of quality; converting once at a good bitrate keeps the result very close to the original.
Is MKV to MP4 free?
Yes — MKV to MP4 is free to use as often as you like, with no account, no caps, and no watermark on the output.
Do I need to install anything?
Nothing to install. MKV to MP4 works inside your web browser on desktop and mobile — no app, codecs, or plugins needed.
Are my files uploaded to a server?
No. Your media files are processed on your own device and never sent to a server, so they stay private.
How to convert mkv to mp4?
Use MKV to MP4 above: upload your file, run it, and download the result. It is free with no limits or sign-up, and the whole process happens on your own device using your browser, so your media is never uploaded and nobody else can access it.
How to convert mkv to mp4 without losing quality?
Use MKV to MP4 above: upload your file, run it, and download the result. It is free with no limits or sign-up, and the whole process happens on your own device using your browser, so your media is never uploaded and nobody else can access it.
What is an mkv file?
Use MKV to MP4 above: upload your file, run it, and download the result. It is free with no limits or sign-up, and the whole process happens on your own device using your browser, so your media is never uploaded and nobody else can access it.