Depending on your platform and technical comfort level, you can download the "IPTV Checker" zip file from several reputable repositories:
Older versions (like 1.09) are hosted on the Internet Archive for those looking for specific historical builds. Core Features Download IPTV Checker zip
Automatically scans hundreds of links from an M3U file to check their status. Depending on your platform and technical comfort level,
Supports various protocols, including HTTP, HTTPS, and Xtream API links. How to Use the Tool Releases · zhimin-dev/iptv-checker - GitHub Download IPTV Checker zip
These tools are designed to streamline the maintenance of large channel lists: