Radar

Find and identify every device on your Wi-Fi, with a signal finder.

Radar lists the devices on the network you are connected to, works out what each one is (camera, computer, phone, TV, printer, smart-home, router) and shows them on a phone-friendly page. A website cannot scan your network, so Radar is a small Python program you run on a device that is on that Wi-Fi. Nothing is installed and your device list never leaves your network.

Download wifi_scanner.py

Android phone (everything on the phone)

Install Termux and Termux:API from F-Droid, then in Termux:

pkg install -y python termux-api curl
curl -O https://radar.ackerworks.com/wifi_scanner.py
python wifi_scanner.py

Mac or Linux computer

curl -O https://radar.ackerworks.com/wifi_scanner.py
python3 wifi_scanner.py

Windows computer

Needs Python from python.org. In PowerShell:

curl.exe -O https://radar.ackerworks.com/wifi_scanner.py
python wifi_scanner.py

Then

Open the link it prints. Use the "From phone" link to view it on any phone on the same Wi-Fi (this is how to use it with an iPhone).

Good to know

Only scan networks you own or are allowed to check.
The signal finder measures from the device running Radar, and can only range devices that broadcast their own Wi-Fi radio (routers, extenders, many printers, cameras and TVs).
Android hides hardware addresses, so scans run on the phone identify devices by name and services only. A computer scan also shows the hardware maker.