What HeatMapper was
HeatMapper was a free Windows program from Ekahau, a stripped-down version of its professional site survey software. You walked around with a laptop, clicked your position on a floor plan, and it drew a coverage heatmap from the signal the laptop heard. Older reviews list its main limits: a survey stopped after 15 minutes, and a survey could not be saved, only captured as a screenshot.
Today Ekahau's old HeatMapper addresses redirect to a page about its paid heatmap products, and HeatMapper is no longer listed. Copies are still offered on download sites, but they are old builds made for the Windows of ten years ago.
HeatMapper and WiFi Heatmapper side by side
| Ekahau HeatMapper | WiFi Heatmapper Free | WiFi Heatmapper Pro | |
|---|---|---|---|
| Price | Free | Free | $79 one-time |
| Available | No longer listed by Ekahau | Yes, in any web browser | Yes, browser plus a helper app for macOS and Windows |
| Readings | Automatic from the laptop | Typed in, or pasted on iPhone with a Shortcut | Automatic, with live readings and guided walks |
| Survey length | 15 minutes (older reviews) | No limit | No limit |
| Keeping the result | Screenshots (older reviews) | Kept in your browser, PNG export | Project files, clean exports, PDF report |
| Predicted coverage | No | Yes, from the router and walls | Yes, adjusted to your readings |
| Floors | One map | One floor | Multiple floors |
Doing what HeatMapper did, in the browser
- Open WiFi Heatmapper and add a picture of the floor plan, or sketch the walls if you have none.
- Stand somewhere, click that spot and enter the signal strength in dBm. Where to find it on a Mac, Windows or a phone is in how to make a WiFi heatmap.
- Repeat room by room. The heatmap fills in as you go, with no time limit.
- Mark the router and draw the main walls to see predicted coverage, and drag the router to try another spot before moving anything.
Nothing is installed and there is no account; the plan and readings stay in your browser. If you miss HeatMapper's automatic readings, Pro adds a helper app that reads the signal as you walk, on macOS and Windows.
Looking at Ekahau's paid tools instead? The Ekahau comparison covers Ekahau AI Pro and Sidekick 2.
Make a heatmap now, free, in your browser.
This guide is published by WiFi Heatmapper, which is not affiliated with Ekahau (a trademark of its owner). HeatMapper's status comes from Ekahau's website, checked on 30 October 2026; its limits come from older published reviews.
