AVI to MKV

MKV (Matroska) can store practically any video and audio codec, so your AVI tracks can be copied into it unchanged. The result is a modern, robust file with exactly the same picture and sound, ready for media servers like Plex, Jellyfin or Kodi.

How to convert AVI to MKV

1. Upload your AVI file.
2. Keep Keep original for a 100% lossless copy.
3. Click Convert and download the MKV.

AVI to MKV features

• Lossless: video and audio streams are copied, not re-encoded.
• Very fast, even for long videos.
• Ideal for Plex, Jellyfin, Kodi and VLC libraries.

What is MKV (Matroska)?

Matroska is an open, flexible container that can store almost any video, audio and subtitle format. It is the standard format for media server libraries and preserves the original streams perfectly. That makes it ideal for archiving old AVI files without changing a single frame of video or second of audio.

Frequently asked questions

Is AVI to MKV conversion lossless?

Yes. With Keep original selected, the tracks are copied byte for byte into the new container.

Why convert AVI to MKV?

MKV handles timestamps, seeking and metadata better than the old AVI format, and media servers support it well.

Will the file size change?

Only slightly, because the content itself is not changed.

Can I make the file smaller at the same time?

Yes, choose a lower quality or resolution; the video will then be re-encoded to H.264.

Privacy, limits and file safety

Your files are processed on our own server, are never shared with anyone and are deleted automatically 60 minutes after processing. You can upload files up to 500 MB and 60 minutes long. No sign-up, no watermark and no software to install: it works in any modern browser on Windows, Mac, Android and iPhone.

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