M3U Tester is a free Android application developed by UDev that allows you to easily check the status of the links in your M3U lists. With this app, you can obtain information about the video, audio, and subtitle codecs, as well as the available languages and video qualities.

One of the best features of M3U Tester is the ability to generate a new list with only the functional links. The app offers two modes of operation:

Mode 1: Check the status of the link only

Mode 2: Check the status and obtain information about the available video, audio, and subtitle tracks.

Overall, M3U Tester is a handy tool for anyone who uses M3U lists and wants to ensure that all the links are functional. It is easy to use and provides accurate information about the links in your lists.