Free tool by DCAST
HLS Live Pulse
Poll a live media playlist on a timer. See whether the manifest is advancing (#EXT-X-MEDIA-SEQUENCE), optional program date time, and detect stalls when the body stops changing — useful before you go live or when debugging packagers and CDNs.
Media playlist URL
When to use HLS Live Pulse
Live HLS updates the media playlist every target duration or faster. If sequence numbers freeze while you are live, viewers at the edge can stall. This tool only does client-side GETs — the same CORS limits as other browser tools apply. For full manifest + playback diagnostics use Stream Lab.