Convert MKV to AAC offline

Convert local MKV files to AAC files offline by JavaScript in your web browser without any software downloads or file uploads!

# File Name File Size Actions
How to convert MKV to AAC offline

Choose local MKV files, choose "AAC" as target audio format, then click the "CONVERT OFFLINE" button to start offline conversions in bulk. Each file can be up to 2GB. Please note this offline audio converter only works in web browsers that support new technologies such as WebAssembly, Shared Array Buffer and Site Isolation. Use online converter instead if this offline converter doesn't work in your web browser.


Full name Matroska Video Advanced Audio Coding
File extension .mkv, .mk3d, .mka, .mks .aac
MIME video/x-matroska, audio/x-matroska audio/aac
Developed by Bell Labs, Fraunhofer Institute etc.
Type of format Container format Audio compression format
Introduction The Matroska Multimedia Container is an open standard free container format, a file format that can hold an unlimited number of video, audio, picture, or subtitle tracks in one file. It is intended to serve as a universal format for storing common multimedia content, like movies or TV shows. Advanced Audio Coding (AAC) is an audio coding standard for lossy digital audio compression. Designed to be the successor of the MP3 format, AAC generally achieves better sound quality than MP3 at similar bit rates. AAC has been standardized by ISO and IEC, as part of the MPEG-2 and MPEG-4 specifications.
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