WiFi Heatmap is a free, browser-based predictive WiFi planning tool — a lightweight alternative to Ekahau, NetSpot and Hamina for homes, small offices and homelabs. You upload a floorplan, trace walls by material (drywall, brick, glass, concrete, wood, metal, low-E glass), and place access points from 41 datasheet-sourced presets across 11 vendors (Ubiquiti UniFi, TP-Link Omada, Aruba, Ruckus, Cisco and Cisco Meraki, Zyxel, EnGenius, MikroTik, Cambium, Netgear) or enter transmit power and antenna gain by hand. Predicted signal strength in dBm is rendered live across 2.4, 5 and 6 GHz using the COST-231 multi-wall propagation model, with wall and ceiling attenuation tabulated separately per band, a coverage contour and exact values on hover. Typical accuracy is ±6–10 dB for homes and small offices; furniture, multipath and 3D ceiling effects are not modelled.
It runs entirely in the browser with no download and no account — the floorplan is stored only in local browser storage and is never uploaded to a server. The same engine also plans Zigbee, Thread and Z-Wave mesh networks at 868/908 MHz and 2.4 GHz.
The free tier covers up to 5 access points on a single floor and exports a watermarked PNG. Pro removes the cap and adds unlimited floors with 2.5D cross-floor signal, channel planning with conflict detection and width-aware auto-assignment, access-point placement optimisation, and a branded client report: a landscape A4 PDF with your own logo and company on the cover, a page per floor with coverage statistics, a device schedule listing every access point with its radio settings and position in metres, and a methodology page stating the model and its error envelope.
Pro pricing is one-time €9 for a 7-day project pass, one-time €39 for a perpetual licence that never renews, or €29 per year as a subscription. There is no "lifetime" tier — that name was retired in 2026.
