USBlyzer is an easy to use software USB protocol analyzer for Windows, which provides a complete yet simple to understand view for monitoring and analyzing USB Host Controllers, USB Hubs and USB Devices activity.

With USBlyzer you can:
> View detailed information about all USB devices and their child components:
- All plugged USB devices in hierarchical auto-refreshed tree view.
- USB device stack layout: Device objects for each driver that is involved in handling I/O activity.
- USB descriptors: Device, Configuration, Interfaces, Endpoints, etc.
- Information related to Plug and Play: Hardware IDs, Instance ID, Software Key, etc.
> Capture, decode and display important information going through USB device stack:
- USB-related requests such as URBs and structures used by USB device drivers.
- I/O Request Packets (IRPs) used by PnP subsystem.
- Kernel-mode and user-mode device I/O control requests (IOCTLs) used by USB client drivers and user-mode applications.
- Incoming and outgoing data traffic of the USB devices.
> Trace and analyze how the user-mode applications and USB device drivers communicate with the USB driver stack.

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