Convert MP4 to MKV
Transform MP4 videos into MKV format with all original streams intact.
Upload Your MP4 File
Drag and drop or click to select
Supports MP4 files
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About the Tool
Our MP4 to MKV converter keeps all video streams, audio tracks, subtitles, and chapters intact while repackaging into the versatile MKV format, perfect for movies, anime, and multi-language videos.
How to Convert Files with Convertiex
Follow these simple steps to convert any file online — fast, free, and without installing software.
Upload Your File
Drag & drop or click to upload any document, image, video, or audio file. Supports 500+ formats with no size headaches.
Choose Output Format
Select your desired output format from our comprehensive list — PDF, DOCX, JPG, MP4, MP3, and hundreds more.
Download Instantly
Hit convert and download your file in seconds. No watermarks, no email required — just clean, ready-to-use files.