Convert MKV to AVIF in bulk.
Large MKV files are supported.

Max size: 200 MB per file

You can convert MKV Learn more about MKV files to

Video
Audio
Image


How to convert MKV to AVIF?

You can convert MKV to AVIF with MConverter in three easy steps:
  1. Choose MKV files from your device
    At the top of this page, drag and drop your MKVs.
    You can also click to select MKV files using your operating system's file picker.
    Another method is to press the keyboard shortcut Ctrl+V (⌘+V on Mac) to paste an MKV file you have copied to clipboard.
    Converting a folder with MKV files to AVIF is also supported: simply paste or drag and drop it.
  2. Click or tap on AVIF from the list of target formats
    Alternatively, you can use the search field to quickly find the format you need, whether it's AVIF or something else.
  3. Download your AVIF files, after MConverter has finished processing them
    There's an option to automatically download the converted AVIF files, so you don't have to press the download icon for each AVIF.
    On desktop platforms, you can download the AVIF files to a different folder by clicking on SAVE TO...
    You may see a share icon as well. Use it to directly share the AVIFs with other apps.

About the formats

Extension mkv
Category Video file formats
Developed by Matroska
Mime type video/x-matroska

Description

MKV files are MatrosKa Video files. Like the Russian Matryoshka doll, which contains multiple smaller dolls nested inside each other, the MKV format can contain multiple video, audio, and subtitle tracks inside a single file. This makes it convenient to have one video with a number of audio and subtitle tracks in different languages, all inside a single playable file.
Extension avif
Category Image file formats
Developed by AOMedia (Alliance for Open Media)
Mime type image/avif

Description

The AV1 Image File Format (AVIF) is a new format which promises better compression and smaller file sizes than JPEG, PNG, WebP, and all other current image formats on the web. Based on the generic HEIF image format, AVIF supports alpha transparency, HDR, lossy and lossless compression. AVIF is already being used by Netflix and Microsoft.

Support in Google Chrome and Chromium-based browsers (like Microsoft Edge and Opera) has landed in late August 2020. Firefox can display AVIF images from version 93, released in October 2021. Meanwhile, Apple's Safari will support AVIF in iOS 16 (coming Fall 2022).

MConverter's AVIF encoder uses a Constant Rate Factor (CRF) of 10, so that there is no noticeable reduction in image quality while keeping the file size as small as possible.

MConverter also lets you create AVIF animations from video or GIF, up to 1 minute long. Note that AVIF animations are currently only playable in Chrome and not Firefox.

Common questions about converting MKV to AVIF

Can I convert MKV to AVIF in bulk?

Yes, MConverter supports batch converting of multiple MKVs to AVIFs simultaneously. You can even drag and drop folders containing MKVs to convert to AVIF.
Pasting MKV files and folders copied in the clipboard also works: use Ctrl+V.

Can I convert an MKV file to AVIF, if its size is 1 GB?

Yes, with MConverter Premium you can convert big MKVs, up to 1 gigabyte each.
The free version lets you convert files up to 200 MB. If you need to convert MKV files over 200 megabytes, try MConverter Premium.

Is converting MKVs to AVIF safe with MConverter?

Yes, we encrypt your connection using industry standards. Plus, your MKV files are only accessible by you. 4 hours after the conversion completes, they are automatically deleted from MConverter’s servers. You can also delete your MKVs and other converted files immediately after finishing the conversion by clicking the bin icon.
Join others who have trusted us to convert over 3,065,493 files so far.

How long does it take to convert MKV to AVIF?

For most videos, the wait could be a few minutes or less. However, MConverter also supports converting larger videos, meaning that it could take a while (up to over an hour, for example).


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