10 Best Free Wifi Heat Mapping Software in 2026, Compared

NetSpot is the easiest way to get a Wi-Fi heatmap without paying: upload a floor plan, walk the rooms, and tap each spot to record the signal. The free version covers one zone with 50 data points per snapshot, enough for a flat or small office, and the map shows signal, noise and channel overlap. When the free limits pinch, Home costs $49 once and Pro $149 once, with no subscription to renew.

The catch is the free tier's size, not its quality. One zone means a larger house or office needs a paid licence, and exports, active scanning and the full survey mode are paid too. NetSpot is still the right first download for almost everyone: it is the only tool here that pairs a genuinely free heatmap with paid licences cheap enough for a small business.

WiFiman is Ubiquiti's free phone app, and its Survey mode is the quickest heatmap in this list: open the app, walk the house, and tap the floor plan at each spot to record the signal. Green means strong, yellow means middling, red means weak, and the finished map shows exactly where the dead zones sit. It costs nothing, shows no ads, has no premium tier, and works with any Wi-Fi network, not only Ubiquiti gear.

The limits are the phone itself. The full Floor Plan Mapper needs a UniFi Cloud Gateway, and iPhone users need a $99 WiFiman Wizard device because iOS restricts Wi-Fi scan data. There are also no printable client reports. For mapping one house with the phone already in your pocket, though, nothing else here is this fast or this cheap.

UniFi Design Center is Ubiquiti's free planning tool, and it answers a different question from the survey tools: what should the network look like before you buy anything? Upload a floor plan, trace the walls, drop access points onto the plan, and the tool draws simulated coverage in 2D and 3D, then totals a bill of materials with store prices. Automatic placement even suggests how many access points each room needs.

The catch is that it only plans Ubiquiti hardware, and the map is a prediction, not a measurement — walls, furniture and neighbours all bend real signal in ways the simulation cannot see. Use it to plan the purchase and the AP positions, then verify with NetSpot or WiFiman after the install. For a UniFi shop, it is free money.

Acrylic WiFi Heatmaps is a dedicated survey tool for engineers who map large sites: it handles indoor plans where GPS does not reach, and outdoor GPS mapping for campuses, warehouses and smart-city areas. At each measured point it records signal strength and quality, then renders the coverage map and generates editable reports with a diagnosis of the network and advice on how to improve it. CSV export feeds the data into other tools.

The price is the catch for casual users: there is no free plan, only a 15-day trial, and the shortest licence is one month at €129. It is also Windows only. For a one-off professional survey, though, the one-month licence is the cheapest way to get a proper tool for the job, and you stop paying when the survey ends.

Ekahau AI Pro is the industry standard for enterprise Wi-Fi design, and the price shows it: the perpetual licence costs $5,995 once, and a one-year Connect subscription at $1,995 a year is required with it. In return you get AI-powered design that places access points and plans channels across whole buildings, predictive surveys, spectrum analysis and capacity planning, plus mobile Survey and Analyzer apps and cloud project sync.

The catch is everything around the licence. Full survey features need the Sidekick 2 measurement device, sold separately, and the software is heavy on system resources. For a home or a small office this is vast overkill. For an enterprise engineer designing a hospital, campus or warehouse, it is the tool the client, the team and the next hire all expect.

TamoGraph Site Survey sits between the free tools and Ekahau: a professional survey tool that an IT team can learn in a day. It runs passive and active surveys, draws heatmaps for signal, interference, data rates and throughput, and produces reports ready to hand to a client. It works on Windows and macOS, supports 802.11ax, 6E and 7, and the maps are easy enough to read that a non-specialist can follow them.

The price is the trade-off: there is no free plan, only a fully functional 30-day trial, and Standard costs $999 for a one-year licence. Predictive modelling and GPS support need Pro at $1,999, and full validation can need extra adapters. For a team that surveys offices a few times a year, it is the cheapest route to professional-grade maps.

VisiWave Site Survey is the visual pick in this list: its heatmaps render in 2D and 3D with colour coding a client reads at a glance, and it collects data three ways — one point at a time, continuous walks through the survey area, and GPS positioning for outdoor sites. Custom report templates and Google Earth export finish the job, and the $379-a-year subscription includes all updates and support while it is active.

The limits are the platform and the upsell. It is Windows only, there is no free plan beyond the evaluation version, and predictive surveys — the feature that simulates coverage before hardware exists — need the Pro edition at a higher price. For a surveyor who sells the map as much as the survey, the 3D views are worth the subscription.

inSSIDer is the free first step before any heatmap: it lists every nearby network with its SSID, channel, band and signal strength, so you can see at a glance whether your router sits on a crowded channel. Picking a quieter channel takes minutes, and the channel view makes overlap obvious. It runs on Windows and macOS, needs only a free Oscium account, and has been downloaded more than 5 million times since 2007.

Be clear about what it is not: inSSIDer draws no floor-plan heatmap, so it cannot replace NetSpot or WiFiman for mapping coverage. Packet analysis, snapshots and cloud sync need MetaGeek Plus at $200 a year. Use it to diagnose the neighbourhood first, then map the building with a survey tool.

NetSurveyor is the free Windows classic: freeware with no licence, no account and no limit on machines. It discovers nearby access points in real time and shows them in six diagnostic views, including a channel heatmap, a spectrogram and timecourse charts. A Map screen lets you upload a floor plan and collect samples by clicking your location, and the tool generates PDF reports and plays back recorded data for later analysis.

The trade-offs are age and scope. NetSurveyor is no longer actively updated, so newer Wi-Fi standards and adapters may not be covered, and its heatmap shows channel usage over time rather than coverage on a floor plan. For free Windows troubleshooting with logging and reports, though, it still earns its place.

WiFi Analyzer is the open-source Android analyser from VREM Software Development, and it is free in every sense: no ads, no tracking, no paid plan, and the source code is public. It examines nearby networks, measures signal strength and flags crowded channels across the 2.4 GHz, 5 GHz and 6 GHz bands, with channel graphs and signal meters that make the fix obvious. The install is 2.65 MB and the app was updated in July 2026.

The limits are the platform and the scope. It is Android only, so iPhone and desktop users need another tool, and it analyses channels rather than drawing floor-plan heatmaps. Android 9 and later also throttle Wi-Fi scans, so readings can lag unless you switch throttling off in developer options. As a free pocket analyser, it is hard to beat.