K-Lite Codec Pack is a collection of codecs and related tools. Codec is short for Compressor - Decompressor. Codecs are needed for encoding and decoding (playing) audio and video. It is designed as a user-friendly solution for playing all your video files. You should be able to play all the popular movie formats and even some rare formats.

K-Lite Mega Codec Pack combines the contents of three codec packs:

* K-Lite Codec Pack Full
* QuickTime Alternative
* Real Alternative