While there is no official "portable" executable (e.g., a .zip or .paf format) offered by the developer, the software is lightweight and can be installed quickly on any machine. If you require a strictly portable or more complex monitoring solution, consider these alternatives: UptimeRobot: Free Website Monitoring Service
The official version of Net Uptime Monitor requires a paid license after a 30-day trial. A license key unlocks advanced features, removes the limit on the number of monitored devices, and disables nag screens. net+uptime+monitor+license+key+portable
To get started with Net+ Uptime Monitor, simply: While there is no official "portable" executable (e