WiFiman — Before Saying “The Wi-Fi Is Acting Up”...

The Wi-Fi isn't working properly.

The first instinct is usually to check the signal strength. And when all those little bars are showing, things suddenly get a lot less obvious: on paper, everything should be fine.

I learned the hard way, though, that a strong signal doesn't necessarily mean a healthy Wi-Fi network.

And WiFiman, a free little tool I really wish I'd discovered sooner, played a big part in that lesson. Behind its sometimes rather busy interface, there's a lot that can make network problems considerably less mysterious.

And you don't need to be a network engineer to get something out of it.

For those in a hurry...

And yet, everything seemed to be working...

I'd been using Wi-Fi for years without knowing about WiFiman.

And for quite a while, I'd had an annoying problem at home: the network generally worked fine, but some devices regularly behaved oddly. Slowdowns, dropped connections, things that were hard to reproduce... In short, enough to know something was wrong, but not enough to work out what.

The most frustrating part was that everything seemed to be in order.

Coverage was good, signal strength was good, the access points were well placed, and nothing really stood out.

Until one day, WiFiman showed me something I'd never even considered.

A warning in red, next to one of my SSIDs, was reporting that the associated access point was overloaded.

After digging a little deeper, I finally understood: it was an older model, with a much lower capacity for handling multiple devices simultaneously than more recent access points.

Full bars, but not enough chairs

The problem wasn't the amount of data passing through the access point.

It was the number of devices all asking for a seat at the same time.

That access point came from a time when a home had a few computers, a couple of phones and, if you were lucky, a Wi-Fi printer.

In the meantime, things had changed a little at my place.

Phones, tablets, TVs, smart-home devices, assorted modules... even when they barely use any bandwidth, they're still clients the access point has to manage.

My old AP had simply reached its limits. Over the years, there were more and more devices looking for a seat, but no more chairs to go around.

A few very practical uses

WiFiman can do quite a lot, and the sheer amount of information on screen when you first open it can be a little intimidating.

But you don't need to understand everything to start getting some value from it.

So rather than going through every feature, here are a few very ordinary situations where it can help you understand what's going on.

“The Wi-Fi is terrible in this room”

This is probably the most obvious one.

As you walk around with your phone, WiFiman lets you see how signal strength really changes, and just how much it can vary from one spot to another.

It won't necessarily give you the solution straight away, but it can at least help you check whether the problem really is one of coverage.

And sometimes, moving an access point slightly — or simply discovering that a particularly solid wall is in exactly the wrong place — is enough to explain a lot.

“I've got full bars, but everything's slow”

As we've just seen, a strong signal mostly means your device can hear the access point clearly. It doesn't mean everything behind it is working properly.

An access point can be overloaded, have too many clients to handle or run into other problems while your phone proudly continues to display full bars.

That's exactly what made my own problem so hard to identify at first.

The signal was fine. The Wi-Fi, not so much.

“There's Wi-Fi everywhere around my house”

In a fairly built-up area, you only have to open the list of available networks to realise you're rarely alone.

WiFiman lets you see nearby networks, the bands and channels they use, and their signal strength.

Without becoming an expert in radio frequencies, you can start to understand why having several Wi-Fi networks stepping on each other's toes doesn't exactly help, and why channel selection matters.

It's also a fairly simple way to put a picture to something as abstract as Wi-Fi interference.

“Is it my Wi-Fi or my Internet connection that's acting up?”

When a page takes three seconds to load, the conclusion is often immediate:

“The Wi-Fi's playing up.”

Maybe.

But the problem could be somewhere else entirely.

WiFiman's various speed, latency and connectivity tests can provide a few clues to help separate problems on your local network from those farther down the line.

Again, the idea isn't to get an automatic diagnosis, but simply to avoid looking in the wrong place from the start.

“Now where did that thing go?”

This one gets particularly interesting once you start accumulating smart-home devices.

You plug in a new device. It connects to the network. Great.

Now what?

WiFiman can discover devices on your network. That makes it a handy way to check whether something really is connected, or just find out which IP address it picked up.

It's probably not the application's most spectacular feature.

But it can save you quite a bit of time.

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There are, of course, other possibilities, and some features become considerably more interesting when you're using WiFiman alongside UniFi equipment.

But for many everyday problems, a few fairly simple pieces of information can already take you from:

“Something's broken.”

to:

“Ah... so that's what's going on.”

And that's already a big step forward.

So, is it worth it?

WiFiman won't fix your network.

It won't always explain why your Wi-Fi is misbehaving, either, and some of the information it displays will probably take a little extra research to understand.

But that's not really what I'm asking it to do.

Since discovering it, I've gone back to it several times for quite different problems.

It has rarely handed me the solution outright.

But it has very often shown me where to start looking.

And that's probably what I like most about it: even without being a networking specialist, you can see a little further than the handful of Wi-Fi bars we normally rely on.

Of course, there are things it can't see. WiFiman isn't a spectrum analyzer: it can show you the Wi-Fi environment, but not all the radio activity that might be going on around you.

So it's worth keeping its limitations in mind.

But WiFiman is free.

And rather than filling this article with screenshots that might be outdated in six months, the easiest thing is probably to install it and see what it has to say about your own network.

Worst case, you spend a few minutes on it and it doesn't give you the answer you were looking for.

Best case, you discover something you never even suspected.

Personally, I mostly wish I'd found it sooner.

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2026-10-08 — Update: improved the article's flow, shortened a few passages and clarified the real-world example of access point overload.