See what an OPC UA server exposes, without a client licence
The explorer looks for OPC UA servers on the networks your PC is on, listens for the ones that announce themselves, and opens whichever you choose: the address space from the Objects folder down, with every variable's value, data type, access level and status. It reads. It never writes.
Windows, Linux (.deb). Free for engineers — no account, no licence key.
What it does
Two ways to find servers
A sweep of your networks on port 4840 and common vendor ports, and mDNS for servers that announce _opcua-tcp._tcp. An open port that does not answer OPC UA is listed apart, not as a server.
Endpoints as the server offers them
Security mode and policy, anonymous or user name, straight from GetEndpoints. A server that advertises a host name your PC cannot resolve is reached at the address it was found on.
The whole address space
Browses hierarchical references breadth first, within the node and depth limits you set, and reads variables level by level with data type, value rank, access level, status and timestamp.
Read-only by design
FindServers, GetEndpoints, Browse and Read. Nothing is written, and the tool runs only when you start it.
Moving from testing to production?
When the device is understood and the data needs to go somewhere continuously, Edge Gateway turns the same tag map into a deployed runtime.