Get started with the free trial or purchase a license for unlimited use
Windows 10/11 - 64-bit - ~80 MB
License key sent instantly by email
Windows 10 or Windows 11 (64-bit)
4 GB RAM minimum
200 MB available space
Download the portable ZIP package - no installation required. Just extract and run.
Download Portable ZIPModbusBB is a single, self-contained download that includes both the graphical app and the command-line tool, with every feature available during the free trial - nothing is locked behind the paid version except the time limit.
Read and write real devices over Modbus TCP, RTU and ASCII - or run ModbusBB as a slave to simulate a device.
A modern Windows interface plus a scriptable command-line tool for automation.
Watch values on a real-time chart and log polling data to CSV for analysis.
Slave and register scanners, response-time statistics, and a built-in ping tool.
Yes - 30 days with full functionality (15-minute sessions). No credit card required.
Windows 10 or 11 (64-bit), 4 GB RAM and about 200 MB of disk space. The .NET runtime is bundled - there is nothing else to install.
Both are provided. The installer adds Start-menu shortcuts; the portable ZIP runs from any folder or USB stick with no installation and no admin rights.
Your license key arrives by email instantly. Open ModbusBB, paste the key, and click Activate. It works on up to 3 devices and keeps working offline after activation.
New to Modbus? Start with our Learn Modbus guide and tutorials, or see why ModbusBB is a great ModbusPoll alternative.