MKV to MP4 Converter
Change MKV videos into MP4 quickly, often without re-encoding, right in your browser. Your files are never uploaded to our servers. ToolkitPoint processes them on your own computer, so confidential documents stay with you.
Processed in your browser. Your files are not uploaded.
How to use MKV to MP4 Converter
- This page presets the output container to MP4.
- Add your MKV file (or several for a batch).
- Read the per-file plan: it says whether each stream is copied or re-encoded and which devices will play the result.
- Optionally change resolution, quality or audio settings, then start the conversion.
- Download the MP4 file, or all results as a ZIP.
What MKV to MP4 Converter does
Change MKV videos into MP4 quickly, often without re-encoding, right in your browser.
Most media work stays in browser memory. Heavy converters lazy-load a local WebAssembly engine only after processing starts. For MKV to MP4 Converter, the operation is specifically to change MKV videos into MP4 quickly, often without re-encoding, right in your browser.
Worked example
A 180MB movie.mkv with H.264 video and AAC audio converts to movie.mp4 in seconds: the plan shows both streams copied, so the picture and sound are bit-for-bit the same as the MKV.
When MKV to MP4 Converter is the right tool
- Playing MKV files on TVs, consoles and phones that only accept MP4.
- Importing MKV recordings from OBS into editors.
How to verify the result
Play the beginning and end of the output, confirm duration and format, and check lip-sync or audio quality where relevant. The final MKV to MP4 Converter output should visibly match this goal: Change MKV videos into MP4 quickly, often without re-encoding, right in your browser.
Important limitations
Large media jobs can be slow or run out of browser memory. Keep the tab open and use desktop software for very large or production-critical files. This matters here because MKV to MP4 Converter is designed to change MKV videos into MP4 quickly, often without re-encoding, right in your browser, not to repair unrelated source problems.
A free MKV to MP4 Converter alternative
People looking for MKV to MP4 Converter often compare products such as CapCut, Kapwing, VEED. ToolkitPoint is not affiliated with those services. This page keeps change mkv videos into mp4 quickly, often without re-encoding, right in your browser free and available without an account; features, limits, and policies on other products can change, so compare their current product pages before choosing.
Last updated: September 27, 2026
Frequently asked questions
Why is MKV to MP4 sometimes instant?
MKV and MP4 are both containers. When the video is H.264 or H.265 and the audio is AAC or MP3, the streams are copied into MP4 without re-encoding, which is fast and lossless.
What happens to subtitles and extra audio tracks?
MP4 accepts fewer subtitle formats than MKV. Streams that MP4 cannot hold are converted when possible or left out, and the plan lists what will happen to each stream before you start.
My MKV has DTS or FLAC audio. Will it work?
Yes. The video can still be copied while only the audio is re-encoded to AAC, which MP4 players support. The plan shows this per stream.
Is there a size limit?
The first conversion downloads about 32 MB of processing code; videos over 250 MB are rejected because the browser must hold them in memory.
Are files uploaded?
No. Everything happens in your browser.