The whole RF picture, before you build.
A free RF planning tool. Drop nodes on a map — Airendil pulls real elevation along every path and models your network end-to-end: coverage heat maps, link budgets, Fresnel zone clearance, line of sight. Right in the browser, nothing to install.
One propagation model, three views of it
Point-to-point, multi-hop path, or a whole coverage area — the same terrain-aware model behind each.
Terrain-shadowed heat maps
Per-node signal coverage swept with knife-edge diffraction — valleys attenuate the way the real world does, not a flat circle.
Fresnel & line-of-sight, on real ground
Every link checked against a live elevation profile: FZ1 clearance, the critical obstruction point, and a clear / marginal / blocked verdict.
Margins you can defend
FSPL, Okumura–Hata or diffraction models, antenna gain, cable loss and Rx sensitivity — rolled into a per-direction margin in dB.
Per-node antenna modeling
Height, gain, 3 dB beamwidth, heading and F/B ratio — each node its own, with an on-map cone and tap-to-aim heading picker.
Pick your precision
Six elevation sources, from no-key global datasets to ~1 m USGS LiDAR. Switch anytime — only dirty links re-fetch.
Whole paths, one cross-section
Chain nodes into a path and analyze it as one continuous terrain profile across every segment.
Built for ease of use
No import wizard, no separate elevation lookup — it all happens in the same view.
KML in, KML out + PDF reports
Full sessions travel as KML, ready for Google Earth. Printable site-survey PDFs come straight from your session.
Cloud save, optional account
Sign in to keep sessions and settings across devices — or skip it entirely and the tool still works.
Built for the truck
Address search, a distance-measuring tool, and a mobile layout tuned for one-thumb use on site.
Run your first link in the next two minutes.
Completely free — no install, no account, no trial limits. Paid tools charge thousands for this; Airendil doesn't.