MKVToolnix software (version 8.8.0) is a powerful and user-friendly tool for creating, editing, and inspecting Matroska (MKV) files. Its most important features include the ability to merge multiple video, audio, and subtitle tracks into a single MKV file, extract specific tracks from an existing MKV file, and add or remove chapters and tags. Additionally, it allows users to view detailed information about the contents of MKV files, including video and audio codecs, frame rates, and bitrates.