Offline ConverterConvert MKV to MP4 on Mac
Turn MKV (Matroska) files into MP4 Video right on your Mac — fully offline. No uploads, no watermark, no size limit. Drag in one file or a whole folder and convert in seconds, accelerated for Apple Silicon.
How to convert MKV to MP4 on a Mac
Open Offline Converter for Mac and drag your MKV file (or many) into the window.
Choose MP4 as the output format and adjust quality or size if you need to.
Click Convert — the MP4 file is saved straight to your Mac. Done, offline.
Why convert MKV to MP4 locally
Your files stay private
Your MKV files never get uploaded. Everything is processed on-device, so sensitive photos and documents stay yours.
No watermark, no limits
Convert as many MKV files to MP4 as you want — no watermark, no size cap, no daily quota.
Fast on Apple Silicon
Conversion is hardware-accelerated and runs at the speed of your SSD, even for large batches.
About MKV and MP4
MKV (Matroska). MKV (Matroska) is a common video format. MP4 Video. MP4 Video is a widely supported video format.
MKV to MP4 — FAQ
Is converting MKV to MP4 free?
The 3-day trial converts MKV (Matroska) to MP4 Video with no watermark, no size limit and nothing uploaded. After that the app is $29.99 once — not a subscription.
Do my MKV files get uploaded?
No. The conversion happens entirely on your Mac. Your MKV files never leave your device — it even works offline.
Can I convert many MKV files at once?
Yes. Drop a whole folder of MKV files and convert them all to MP4 in a single batch.
Convert MKV to MP4 on Mac
Free 3-day trial, then $29.99 once · macOS 11+ · Nothing leaves your device