Online data from airplanes.live (routes via adsbdb, photos via planespotters) — or feed a local SDR dongle for fully offline use.
Plug your SDR (RTL-SDR or HackRF One) into this computer, then pick it in the browser prompt. Desktop Chrome/Edge only. Set your location below so the scope centers on you. (Experimental — decodes ADS-B in the browser; HackRF support is unverified and may need tuning.)
Run dump1090-fa, readsb, or dump1090_sdrplus with an RTL-SDR, HackRF One, or other SDR. Because browsers block an https page from reading http://localhost, serve this app from the same machine (open it over http/localhost) so it can reach the feed. Set your receiver location below.
RX health: start an in-browser SDR to see decode stats…
Raise gain to reach distant aircraft; lower it (or turn the amp off) if you are near an airport and the decode rate stalls.