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OPC UA WebClient

FREE

A browser-based OPC UA client that requires zero installation. Connect to any OPC UA server, browse its address space, read and write values, and monitor subscriptions -- all from Chrome, Firefox, Edge, or Safari.

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opc.tcp://192.168.1.10:4840CONNECTEDREADWRITESUB ACTIVE #0ADDRESS SPACE▼Objects▼Server▶ServerStatus▼DeviceSet▼Pump_001Vibration_XTemperaturePressure▶Pump_002▶Blower_001NODE ATTRIBUTESVibration_XOPC UA Variable NodeATTRIBUTEVALUENodeIdns=2;s=Pump_001.Vib_XDataTypeDouble (Float64)Value2.4 mm/sTimestamp2026-02-08T14:00:00.000ZStatusCodeGood (0x00000000)LIVE SUBSCRIPTIONVibration_X2.4Temperature70.2Pressure4.3Samples: 0Session Log[00:00]CreateSession → SessionId: ns=1;i=4840[00:01]Browse → Objects (i=85) children=24[00:02]Read → Vibration_X = 2.4 mm/s

Core Capabilities

Browse Address Space

Explore server node hierarchies with lazy-loaded tree navigation. Expand objects, variables, and methods interactively.

Read & Write Values

Read any variable in real-time. Write to writable nodes with type-aware editors and server-side validation feedback.

Monitor Subscriptions

Create monitored items with configurable sampling intervals. View live value changes with sparkline mini-charts.

Certificate Management

Generate, import, and trust X.509 certificates. Supports None, Sign, and SignAndEncrypt security modes.

Technical Specs

  • Max Concurrent Sessions8
  • Max Monitored Items500 per session
  • Sampling Interval100 ms minimum
  • Security PoliciesBasic256Sha256, Aes128, Aes256
  • AuthenticationAnonymous, Username/Password
  • TransportWebSocket (WSS) via proxy

Supported Browsers

Chrome 90+
Firefox 88+
Edge 90+
Safari 15+

Requires WebSocket support. No plugins or extensions needed.

Start Browsing OPC UA Servers Now

No download, no account, no cost. Open your browser and connect to any OPC UA server in seconds.

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