R4D4RVU

Data source Online — community ADS-B Local SDR (offline) RTL-SDR (USB) — in browser, experimental HackRF One (USB) — in browser, experimental

Online feed Auto — try each until one answers adsb.lol (direct) adsb.fi (direct) adsb.one (direct) airplanes.live (needs API key) adsb.lol via public relay adsb.fi via public relay

airplanes.live closed its free API in 2026, so the radar now probes several community feeds. Leave this on Auto unless you want to pin one.

My CORS proxy (optional, most reliable)

Run local-feed-proxy.js from the repo on your own machine and put an HTTPS tunnel in front of it, then paste that URL here. The radar appends /v2/point/lat/lon/nm. If the proxy publishes a feed-url.json next to this page, the radar picks it up automatically and you can leave this blank.

airplanes.live API key (optional) My proxy key (optional)

If your proxy is set up with a shared token, put it here and the radar inserts it as the first path segment. Anyone who finds the address without the token just gets a 404.

airplanes.live API key (optional)

SDR feed URL — dump1090 / readsb aircraft.json

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…