Convert MKV to MP4.
Make Matroska .mkv videos play everywhere as MP4 — fast remux with ffmpeg, quality preserved.
How it works
- 01
Add your MKV
Drop one or many files, or click to browse. Private by default.
- 02
Convert with a local engine
MKV becomes MP4 using a best-in-class open engine — no paid API in the loop.
- 03
Download
Grab your MP4 (or a zip of many), or open it in TranscriptAI to do more.
Best available engine, honest about limits
Private uploads, auto-deleted after 1 hour
Batch convert many at once, download as a zip
No watermark, no signup to try
Fast, faithful conversion
Direct handoff to TranscriptAI
Your file is ready. Want to do more with it?
Open this file in TranscriptAI to generate a transcript, summary, structured notes, flashcards, quiz questions or action items — automatically.
Common questions
Is it free?+
Yes — convert MKV to MP4 free, with no signup.
Is my file private?+
Uploads go to a private bucket, are converted, and auto-delete after 1 hour.
Will quality hold up?+
Remuxed without re-encoding where possible.
Related workflows