July 2026 WiFi Shortlist

Best Free WiFi Heat Mapping Tools

The word “free” hides several limits in this category. Some tools measure a live network, while others only predict coverage from a floor plan.

By Kismac-ng Journal Editorial Team Published · Updated
Download NetSpot Free Compare All 5
⚡ TL;DR · Quick Answer

NetSpot is the best overall starting point due to its approachable interface, wide platform support, plus stronger upgrade path. Its free desktop edition mainly handles inspection, though, so choose WiFiman for a genuinely free mobile walkthrough or Hamina for free predictive planning.

★ Best Overall
1

NetSpot

9.0/10

Best for: Home users who want one interface for WiFi inspection, floor-plan surveys, plus eventual access to deeper paid analysis

  • Free desktop WiFi inspector for nearby network analysis
  • Apps available for Windows, macOS, Android, plus iOS
  • Clear upgrade path from scanning to measured surveys
  • Desktop product supports imported floor plans
Visit Site →
2

WiFiman

8.6/10

Best for: UniFi households using a compatible LiDAR-equipped phone for a fast room-by-room coverage check

  • Completely free mobile download
  • Automatic floor-plan capture on supported devices
  • Real-time signal monitoring during a walkthrough
  • Includes speed plus latency testing
Visit Site →
3

Hamina Network Planner

8.4/10

Best for: Network learners or small-site planners modeling no more than three access points before installation

  • Free predictive design with no survey hardware
  • Supports custom wall attenuation
  • Up to three simulated access points
  • Downlink coverage heatmaps included
Visit Site →

Free WiFi Heat Mapping Tools Compared

These tools are compared by whether they measure an installed network or create a predictive model before installation. The scores reflect free-plan usefulness, setup friction, platform reach, plus limitations rather than laboratory RF accuracy.

Tool Measured Survey Predictive Planning Price Score
1. NetSpot PICK ● No ● No Free 9.0/10
2. WiFiman ● Yes ● No Free 8.6/10
3. Hamina Network Planner ● No ● Yes Free 8.4/10
4. UniFi Design Center ● No ● Yes Free 8.1/10
5. Cambium Wi-Fi Designer ● No ● Yes Free 7.7/10

The 5 Best Free WiFi Heat Mapping Tools, Reviewed

01

NetSpot

Windows, macOS, Android, iOS · Etwok

9.0/10

NetSpot is the most balanced starting point here. The free desktop edition scans nearby networks, shows channels plus signal levels, while its heatmap functions are available as demos. That distinction matters. A continuing measured desktop survey requires Home or a higher edition.

The wider toolset is the reason it still ranks first. NetSpot runs on four major platforms, while the paid desktop editions build on the same interface with actual floor-plan surveys. Home supports 2 zones, 2 snapshots per zone, 50 points per snapshot, plus three core heatmaps.

Download the free edition if you first need to diagnose channel crowding or understand the workflow. Do not mistake it for unlimited free heat mapping. For a single no-cost map, WiFiman may suit you better if your phone plus network meet its requirements.

Best forHome users who want one interface for WiFi inspection, floor-plan surveys, plus eventual access to deeper paid analysis

Standout featureIts broader product path covers live scanning, measured surveys, predictive planning, plus 20-plus visualizations
NetSpot Pros
  • Free desktop WiFi inspector for nearby network analysis
  • Apps available for Windows, macOS, Android, plus iOS
  • Clear upgrade path from scanning to measured surveys
  • Desktop product supports imported floor plans
  • Useful mix of signal, SNR, plus interference views in paid Home
NetSpot Cons
  • Free desktop heatmaps are demos, not unrestricted surveys
  • Report export is reserved for higher editions
  • Platform features differ, especially on iOS
Free $0 Network inspection plus heatmap demos; ongoing desktop surveys require an upgrade
Download NetSpot Free
02

WiFiman

iOS, Android · Ubiquiti

8.6/10

WiFiman offers the simplest route from phone to visual coverage map. Its mobile Floorplan Mapper records signal strength as you walk, so there is no need to click dozens of points on an imported drawing.

The catch is hardware dependence. Ubiquiti specifies a LiDAR-equipped mobile device for Floorplan Mapper, while richer signal, throughput, latency, plus roaming details require a UniFi Cloud Gateway. The desktop app does not include the mobile mapping features.

This is a strong choice for checking a living room, hallway, or small office after moving a mesh node. It is less suitable for formal survey documentation or vendor-neutral predictive planning.

Best forUniFi households using a compatible LiDAR-equipped phone for a fast room-by-room coverage check

Standout featureFloorplan Mapper records signal strength while the user physically walks through the space
WiFiman Pros
  • Completely free mobile download
  • Automatic floor-plan capture on supported devices
  • Real-time signal monitoring during a walkthrough
  • Includes speed plus latency testing
  • Very little setup for compatible UniFi homes
WiFiman Cons
  • Floorplan Mapper requires supported LiDAR hardware
  • Several connection metrics require a UniFi Gateway
  • No desktop heat-mapping workflow
Mobile App $0 Free download; mapping capabilities depend on device plus network hardware
Get WiFiman
03

Hamina Network Planner

Web app · Hamina Wireless

8.4/10

Hamina is a predictive planner rather than a walk-through survey app. Upload a floor plan, scale it, draw walls or other attenuating objects, then place virtual access points to estimate downlink coverage.

The free account is unusually useful for learning RF design. It permits 3 simulated APs, 5 AI wall-drawing runs, downlink heatmaps, plus customizable wall height or attenuation. That is enough for an apartment, house, café, or very small office.

There is no measured WiFi survey in the free plan. PDF export, uplink heatmaps, automatic AP placement, plus unlimited access points also require paid products. Treat its output as a planning model, then validate the installation with real measurements.

Best forNetwork learners or small-site planners modeling no more than three access points before installation

Standout featureThe free account includes customizable walls, downlink heatmaps, plus up to three simulated APs
Hamina Network Planner Pros
  • Free predictive design with no survey hardware
  • Supports custom wall attenuation
  • Up to three simulated access points
  • Downlink coverage heatmaps included
  • Works through a browser
Hamina Network Planner Cons
  • No measured site surveys in the free account
  • Three-AP ceiling limits larger projects
  • Free reports cannot be exported to PDF
Free Account $0 Predictive planning for up to 3 APs; no measured surveys
Planner $980/yr Unlimited AP placement, PDF reports, plus expanded planning features
Try Hamina Free
04

UniFi Design Center

Web app · Ubiquiti

8.1/10

UniFi Design Center turns an uploaded floor plan into a predictive deployment model. You can draw attenuation objects, place UniFi access points, compare primary or overlapping coverage, then review a data-rate heatmap.

A July 2026 update added automatic AP placement plus automatic channel planning. Those features save time during early drafts, particularly if you have not settled on access-point count or radio placement.

The tool is license-free, yet it is tied closely to Ubiquiti hardware. Its maps predict coverage rather than measure the live RF environment. They will not reveal a neighbor's overlapping channel, a noisy microwave, or poor client behavior.

Best forBuyers designing a new UniFi installation who want coverage estimates plus a matching equipment layout

Standout featureAutomatic AP placement plus automatic channel planning are built into a license-free browser tool
UniFi Design Center Pros
  • License-free browser access
  • Automatic access-point placement
  • Automatic channel planning
  • Customizable walls plus attenuation objects
  • Useful 2D, 3D, coverage, plus data-rate views
UniFi Design Center Cons
  • Centered on UniFi hardware
  • Predictive output is not a post-install survey
  • Requires careful floor-plan scaling for useful estimates
Design Center $0 License-free predictive planning for UniFi deployments
Open UniFi Design Center
05

Cambium Wi-Fi Designer

Web app · Cambium Networks

7.7/10

Cambium Wi-Fi Designer keeps the process basic: upload a floor plan, scale it, add access points, then inspect predicted RF coverage. A guest mode lets you explore before creating an account.

The service is free to use. Registered users can save projects or email a completed heatmap with a bill of materials. It also provides a built-in drawing option if no floor-plan image is available.

Its main weakness is scope. This is a design aid for Cambium deployments, not a live signal survey. The interface feels more utilitarian than Hamina or the newer UniFi Design Center, though that simplicity can help on a quick quote.

Best forInstallers drafting a Cambium-based network who need a free heatmap plus bill of materials

Standout featureRegistered users can save or email a completed predictive heatmap with its equipment list
Cambium Wi-Fi Designer Pros
  • Free cloud-based planning tool
  • Guest demo available
  • Built-in floor-plan drawing
  • Saved heatmaps for registered users
  • Can produce a bill of materials
Cambium Wi-Fi Designer Cons
  • Predictive maps only
  • Best suited to Cambium access points
  • Fewer advanced analysis options than professional planners
Wi-Fi Designer $0 Free predictive planning; registration enables saving plus email output
Visit Cambium Wi-Fi Designer

How We Evaluated These Free WiFi Heat Mapping Tools

We compared the current free-plan limits shown in each maker's documentation as of July 2026. Scoring focused on whether the tool creates measured or predictive maps, floor-plan handling, device restrictions, platform access, export limits, plus how quickly a home user could reach a useful result.

Scores are editorial rather than controlled RF benchmarks. Predictive coverage cannot be fairly benchmarked against a walkthrough survey because the two methods answer different questions.

How to Choose a Free WiFi Heat Mapping Tool for Your Space

Start by deciding whether you need to map an existing network or plan a new one. For an installed network, use measured readings from WiFiman or a paid NetSpot survey. For access-point placement before installation, choose Hamina, UniFi Design Center, or Cambium Wi-Fi Designer.

Also check the hidden requirements. Mobile mapping may need LiDAR or matching network hardware. Browser planners may support only one vendor. A free desktop download may scan channels without letting you complete a reusable heatmap.

Common Free WiFi Heat Mapping Mistakes to Avoid

Do not judge WiFi from color alone. A green signal map can still hide channel contention, low SNR, packet loss, bad roaming, or a slow wired uplink. Keep the same phone or laptop throughout a survey since different radios report signal levels differently.

For predictive maps, scale the floor plan before placing access points. Mark concrete, brick, tile, metal shelving, plus elevator shafts realistically. A rough wall model can produce a polished map that has little connection to the finished space.

Which Free WiFi Heat Mapping Tool Should You Pick?

NetSpot earns first place because it is the easiest broad starting point for inspecting WiFi now, then moving into proper surveys later. Its free heatmaps are demos, so WiFiman is the better zero-cost choice for a compatible mobile walkthrough. Pick Hamina, UniFi Design Center, or Cambium Wi-Fi Designer when you need to model access-point placement before buying hardware.
Top pick NetSpot
Use a predictive planner before installation, then verify the finished network with measurements taken from the devices people actually use.

Free WiFi Heat Mapping Tool Questions

What is a WiFi heat map?
A WiFi heat map overlays wireless data on a floor plan. Colors usually represent signal strength, though some tools can map SNR, interference, throughput, data rate, or access-point overlap.
Is NetSpot really free?
NetSpot offers a free desktop edition for network inspection plus heatmap demos. Continuing desktop survey work requires Home, Pro, or Enterprise. Mobile capabilities use separate feature sets.
Can NetSpot Free create a complete WiFi survey?
Not as an unrestricted desktop project. The free desktop edition demonstrates heatmaps, while Survey Mode is part of paid editions. This limit is easy to miss when comparing downloads.
Which free tool measures my existing WiFi signal?
WiFiman can record real signal strength through Floorplan Mapper on supported mobile devices. NetSpot's paid editions provide the more conventional point-by-point desktop survey workflow.
Which free tool is best for planning access-point placement?
Hamina Network Planner is the strongest vendor-flexible option for a small design, though its free account is capped at three simulated access points. UniFi Design Center is better for an all-UniFi build.
Do free WiFi heat mapping tools work without a floor plan?
Some do. WiFiman can create a floor plan during a compatible mobile walkthrough. Cambium Wi-Fi Designer includes drawing tools. Imported plans usually make dimensions plus wall placement easier to control.
What is the difference between a measured heatmap plus a predictive heatmap?
A measured heatmap uses readings collected inside the real space. A predictive heatmap estimates coverage from access-point specifications, wall materials, radio settings, plus floor-plan geometry.
Are predictive WiFi heatmaps accurate?
They are useful estimates, not proof of performance. Accuracy depends on correct scale, wall attenuation, antenna models, mounting height, radio power, plus client behavior. Validate the finished network on site.
Can I make a WiFi heatmap with my phone?
Yes. WiFiman supports mobile floor-plan mapping on compatible LiDAR-equipped devices. NetSpot also offers Android plus iOS apps, though available map types differ by platform or purchase level.
Does WiFiman require UniFi hardware?
The app is free, yet its richer wireless metrics require a UniFi Cloud Gateway. Floorplan Mapper also depends on compatible mobile hardware, so check both requirements before relying on it.
Can a WiFi heatmap find interference?
A basic signal map cannot. Look for SNR, signal-to-interference ratio, channel utilization, spectrum analysis, or throughput views. Free tools often omit several of these deeper measurements.
What signal level should a WiFi heatmap show?
Around -67 dBm is a common planning target for reliable everyday coverage, though voice, dense offices, cameras, plus low-power devices may need different thresholds. Signal alone does not guarantee good service.
Should I map 2.4 GHz, 5 GHz, plus 6 GHz separately?
Yes. Each band has different propagation, capacity, plus device support. A strong 2.4 GHz map can hide weak 5 GHz coverage, while 6 GHz commonly needs closer access-point spacing.
How many survey points should I collect?
Collect enough points to capture each room, doorway, corridor, plus known trouble spot. Keep spacing consistent. More points help only if the device position plus map clicks remain accurate.
Can I use these tools for an office or warehouse?
You can use free tools for a rough check or small predictive draft. Large, high-ceiling, safety-critical, or high-density sites usually need professional survey software, suitable adapters, plus post-install validation.
Why does my heatmap look different on two devices?
Phones plus laptops use different antennas, chipsets, drivers, cases, plus power-saving behavior. Use one representative client for comparisons, then spot-check devices that matter to daily work.
Will moving my router fix every weak area?
Not necessarily. Repositioning can help, though thick walls, poor channel choices, overloaded mesh backhaul, low-power clients, or interference may require another wired access point or configuration changes.
Download NetSpot Free · #1 Pick