These tools are designed to streamline the maintenance of large channel lists:
The zhimin-dev / iptv-checker repository on GitHub is one of the most active versions, offering zip releases for Windows ( x86_64-pc-windows-msvc.zip ) and other platforms. Download IPTV Checker zip
Depending on your platform and technical comfort level, you can download the "IPTV Checker" zip file from several reputable repositories: These tools are designed to streamline the maintenance
Supports various protocols, including HTTP, HTTPS, and Xtream API links. How to Use the Tool Releases · zhimin-dev/iptv-checker - GitHub many versions capture screenshots
Beyond just "online/offline" status, many versions capture screenshots, identify video/audio codecs, and detect low framerates.