Do not double-click the JAR directly if you have multiple Java versions installed. Instead, use a command prompt to run it specifically with the older JRE: "C:\Path\To\Java8\bin\java.exe" -jar "C:\Path\To\ubnt-discovery-v2.5.1.jar"
| Topic | Key Details | | :--- | :--- | | | Ubiquiti's official Discovery Tool (v2.5.1, 2017) requires Java 8 , but Windows 10 defaults to newer, incompatible versions, causing the "Java Exception" error. | | The Recommended Fix | Isolate Java 8: Download an old Java 8 JRE, edit launcher.bat to point to its javaw.exe , and run the tool from the batch file. This keeps your system secure. | | Modern Alternatives | WiFiman Desktop is Ubiquiti's Java-free successor, perfect for modern discovery tasks on Windows 10. | | Final Recommendation | If you must use the old tool, use the isolated Java 8 fix . For a cleaner, modern experience, switch to WiFiman Desktop . |
Steps to install/configure Java and run Ubiquiti (UBNT) Discovery Tool v2.5.1 on Windows 10, troubleshoot common issues, and tips for discovery of UniFi/Edge devices on local network. ubnt discovery tool v2.5.1 and java on windows 10
If the tool fails to launch after Java 8 is installed, set the correct Java version for the launcher:
It often fails on modern JREs (Java 11+). Many users report success only with Java 8 Update 251 or older versions like JRE 7 . Do not double-click the JAR directly if you
For many network engineers and IT professionals, the remains a staple in the toolkit. While modern Ubiquiti ecosystems have largely moved to the UISP application or mobile apps, the standalone desktop discovery tool is still widely used for quickly locating AirOS, EdgeMAX, and legacy UBNT devices on a local network without logging into a router interface.
Download the legacy ubnt-discovery-v2.5.1.jar and its companion configuration file from a verified repository like the i8 Digital Downloads Index or dl.behbahan.net . This keeps your system secure
: Unzip the folder to a local directory on your Windows 10 machine.