Seamless. Secure.
Zero-Latency Device Control.
Rezor Bridge is the ultimate connector, forging a robust, bi-directional link between your web browser and any physical device—eliminating complex middleware and high-latency protocols. Experience real-time interaction like never before.
The Nexus Engine: Architecture That Performs
Rezor Bridge is not just a relay; it's a meticulously engineered low-level communication infrastructure designed for mission-critical connectivity. We bypass the limitations of traditional cloud-based device communication models by introducing a decentralized, secure peer-to-peer methodology, orchestrated entirely through a dedicated WebAssembly (WASM) module running within the browser sandbox. This architecture ensures minimal hops, leading to unmatched latency performance and enhanced reliability even in volatile network conditions. Our proprietary Nexus Protocol is optimized specifically for small packet, high-frequency data streams typical of IoT and industrial control systems (ICS). This section details the three foundational pillars of the Rezor Bridge system.
WASM Client Module
The core of the browser interface. Compiled from highly optimized Rust code, the WebAssembly module runs natively in the browser, providing a near-native performance environment for cryptographic operations and complex state management. This offloads significant processing from the server, improving perceived application speed. It handles all connection negotiation, session key exchange, and real-time data encoding/decoding. This component guarantees that the bridge is initialized within milliseconds and maintains state consistency across reconnection events. The module footprint is extremely small, ensuring fast initial load times.
It specifically manages the underlying secure WebSocket connections, failing over gracefully between secure transport layers (e.g., DTLS-like fallback over WebSockets) when standard TLS/WSS connections are interrupted, ensuring session persistence. The module is fully sandboxed, adhering to strict browser security policies.
Device Agent (The Daemon)
A lightweight, multi-platform daemon (available for Linux, Windows, RTOS, and embedded systems) that runs directly on the target hardware. This agent is the endpoint that translates Nexus Protocol commands into native device calls (e.g., GPIO control, serial commands, Modbus, or specific internal APIs). It supports dynamic binding, allowing developers to define custom command mapping schemas at runtime. The daemon consumes minimal resources, often less than 5MB of RAM, making it suitable for resource-constrained edge devices.
The Device Agent manages persistent connection pools and implements a localized, policy-driven firewall to ensure that only authorized commands from the Rezor Bridge network are processed. Its primary function is to maintain a dedicated, encrypted channel to the Orchestration Service for registration and NAT traversal initiation.
Orchestration Service
The globally distributed, cloud-agnostic backend responsible solely for connection handshake, identity verification, and sophisticated NAT traversal (STUN/TURN/ICE-like) logic. It does *not* persist or inspect user data packets, ensuring maximum privacy and regulatory compliance. Once the browser client and the Device Agent establish a direct, encrypted link, the Orchestration Service steps out of the data path. This architecture is the secret to our zero-latency promise.
The service is built on an immutable ledger structure for auditing connection attempts and access grants, providing forensic-level traceability. It also handles device registration and manages certificates for automated device identity rotation, critical for industrial security practices. The service's sole purpose is the establishment and maintenance of the P2P data channel.
Pioneering Features for Real-World Interaction
Rezor Bridge delivers more than just a connection; it provides a comprehensive toolkit for managing device lifecycles, streaming complex data, and ensuring operational continuity. Our features are designed from the ground up to solve the most challenging problems in remote device integration and management.
High-Throughput Data Pipes
Establish persistent, high-capacity data streams capable of pushing hundreds of megabits per second, suitable for real-time video feeds, augmented reality overlays, and massive sensor telemetry dumps. The bridge intelligently manages bandwidth allocation and flow control to prevent buffer overruns on resource-limited devices. It supports both ordered (TCP-like) and unordered (UDP-like) transmission modes.
Atomic Command Execution (ACE)
Guaranteed, non-duplicative, transactional execution of remote commands. If a connection drops mid-command, the system ensures the command is either fully executed upon reconnection or safely rolled back, crucial for robotics and industrial automation (e.g., controlling a valve or moving a robotic arm). ACE uses an embedded commit/rollback ledger on the Device Agent.
Dynamic Device Shadowing
A local, browser-side representation of the device's state. When connected, the shadow is real-time. When disconnected, the shadow provides the last known state and buffers commands locally, executing them instantly upon reconnection. This provides a fluid, uninterrupted user experience, masking temporary network jitter or drops from the end-user. The shadow model is fully customizable via JSON Schema definitions.
WebRTC Data Channel Fallback
When maximum latency reduction is required, Rezor Bridge can optionally utilize a secure, encrypted WebRTC Data Channel initiated by the Orchestration Service for direct UDP-based packet transfer between the browser and device. This is the optimal channel for gaming-level responsiveness or audio/video streaming where packet loss is acceptable but latency is not. This minimizes connection overhead and maximizes throughput efficiency.
Multi-Protocol Translation
The Device Agent natively understands and translates between common industrial and IoT protocols, including MQTT, CoAP, Modbus TCP/RTU, CAN bus, and proprietary serial interfaces, presenting a unified, WebSockets-based interface to the browser. This eliminates the need for protocol-specific gateway hardware, massively simplifying the deployment landscape and reducing infrastructure costs. Custom protocol modules can be integrated via plug-ins.
Firmware Over-The-Bridge (FOTB)
Secure, verifiable firmware update delivery directly from a browser-based management portal to the target device. FOTB includes built-in checksum verification, delta patching capabilities to minimize data usage, and a rollback safety mechanism. This minimizes downtime and ensures the integrity of critical edge software, using the established secure tunnel to bypass common network restrictions.
Transforming Industries: Where Rezor Bridge Shines
The applications for real-time, browser-to-device connectivity are limitless. Rezor Bridge unlocks new paradigms for management, diagnostics, and human-machine interaction across various sectors.
Industrial Automation & Control (IAC)
Enable operators to monitor and adjust SCADA, PLC, and CNC systems directly from a tablet or browser console without a specialized VPN client or proprietary control software. Rezor Bridge provides the low-latency channel needed for safety-critical real-time overrides and parameter adjustments. The secure, auditable connection ensures compliance with industrial security standards and separates the control plane from the data plane, creating a highly resilient architecture. This dramatically simplifies remote maintenance and diagnostic workflows, allowing global teams to perform expert interventions instantly. The system's resilience to network partitioning is key here; control commands are queued and verified even during intermittent connectivity, preventing spurious operations. This capability is paramount in environments with heavy electromagnetic interference or unreliable wireless mesh networks, which are common in factory floors and large production sites.
Remote Medical Device Diagnostics
Allow certified technicians to securely access patient monitoring systems, MRI machines, or surgical robotics remotely for diagnostics, configuration updates, and log retrieval. By using a strictly audited, ephemeral connection, Rezor Bridge helps maintain HIPAA/GDPR compliance by preventing data persistence outside of authorized endpoints and eliminating the need for complex, always-on VPN setups. The FIPS 140-2 certified encryption layers ensure that sensitive medical data remains impenetrable during transit.
This is essential for delivering timely maintenance in geographically dispersed healthcare facilities. Technicians can execute complex diagnostic scripts directly from a secure web portal, reducing truck rolls and dramatically improving the mean time to repair (MTTR) critical life-support equipment. The ability to pull verbose error logs instantly is a game-changer for service operations.
Integrated Automotive Telematics
Extend the in-vehicle experience (infotainment, vehicle settings, remote control functions) to the user's mobile or desktop browser with guaranteed low latency. The bridge allows for real-time over-the-air (OTA) calibration and diagnostics to be performed by dealership service centers or manufacturers, accessing the vehicle's ECU through the on-board Device Agent. This also facilitates new services like personalized driving profiles synchronized to the cloud and retrieved instantly when the user enters the vehicle, ensuring a seamless experience that feels native and immediate.
The connection is robust enough to handle high-frequency data from multiple CAN buses simultaneously, processing and aggregating it before pushing it to the browser. This allows for detailed visualization of vehicle dynamics, battery health, and preventative maintenance alerts with unprecedented fidelity.
Uncompromising Security, Built for Scale
In the world of connected devices, security is the highest priority. Rezor Bridge is engineered with a Zero Trust philosophy, ensuring that every connection, command, and data packet is authenticated, authorized, and encrypted. We provide cryptographic proof of identity for both the browser and the device.
End-to-End Zero Trust
Authentication is continuous. Every packet header is checked against an ephemeral session token derived from a two-factor cryptographic handshake. No implicit trust is ever granted based on network location. The browser client, the Orchestrator, and the Device Agent all independently verify the identity of the other two parties.
Quantum-Resistant Key Exchange
Utilizes a hybrid post-quantum cryptography (PQC) layer (specifically, using a lattice-based KEM) alongside traditional ECDH for forward secrecy. This protects current communications from future decryption attacks by powerful quantum computers, ensuring long-term data protection.
Separation of Data and Control
The Orchestration Service only brokers the connection; it never sees, stores, or processes the actual device data. This strict separation minimizes attack surface area and dramatically simplifies compliance with data sovereignty regulations like GDPR and CCPA.
Automated Certificate Rotation
Device identity certificates are automatically rotated on a configurable schedule, using an internal, self-healing PKI managed by the Orchestration Service. This mitigates risks associated with long-lived credentials and compromised keys.
Regulatory Compliance and Auditing
Rezor Bridge's design philosophy is centered on auditability. The immutable connection ledger provides a complete chain of custody for every remote command and access event, detailing who accessed which device, when, and what actions were performed. We adhere to IEC 62443 standards for industrial control systems security and offer configuration profiles optimized for HIPAA, SOC 2 Type II, and ISO 27001 environments. The platform's decentralized data path is a major advantage for customers operating under strict regional data residency requirements, as the data never leaves the path between the browser and the device's jurisdiction.
Engineered for Developers: Rapid Integration
Integrate Rezor Bridge into your existing web application ecosystem in less than 30 minutes. We provide robust SDKs, comprehensive documentation, and a low-code environment for command mapping.
Available SDKs & Libraries
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Rezor.js (NPM)
A lightweight JavaScript/TypeScript library that wraps the underlying WASM module, providing simple promises and observables for connection status and data streams. Fully compatible with React, Vue, and Angular frameworks. Includes native type definitions for streamlined development.
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RezorPy (PyPI)
Python library for the Device Agent, allowing rapid prototyping on devices running full operating systems (like Raspberry Pi or industrial PCs). Simplifies the mapping of Python functions directly to Nexus Protocol commands. Ideal for data pre-processing at the edge.
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RezorC (Embedded)
A highly optimized C library for integration into RTOS (e.g., FreeRTOS) and bare-metal environments. Minimal heap allocation and a tiny memory footprint. Provides the lowest level of latency control for highly constrained devices.
Simple Connection Snippet
// Import the client from the NPM package
import { RezorClient, ConnectionState } from 'rezor-bridge';
// Your unique device ID (authenticated via Orchestration Service)
const deviceId = 'a4b7c-industrial-plc-001';
// Initialize and connect
const client = new RezorClient({ deviceId });
client.on('stateChange', (state) => {
console.log(`Connection Status: ${ConnectionState[state]}`);
// State transitions: DISCONNECTED -> CONNECTING -> CONNECTED
});
client.connect().then(async () => {
console.log("Bridge operational. Ready for command.");
// 1. Send an Atomic Command (ACE)
const result = await client.sendAtomicCommand('SET_VALVE_STATE', { valveId: 3, state: 'OPEN' });
console.log('Command Success:', result.success);
// 2. Subscribe to a real-time data stream (Telemetry)
client.subscribe('SENSOR_TEMP_STREAM', (data) => {
// data = { timestamp: 1735689600, value: 45.2, unit: 'C' }
document.getElementById('temp-display').innerText = data.value;
});
}).catch(error => {
console.error("Connection Failed:", error.message);
});
This example demonstrates the simplicity of the Rezor.js API for handling state changes, atomic commands, and data subscriptions.
Benchmarked for Hyperscale Reliability
Rezor Bridge is built on cloud-native principles and is designed to manage millions of concurrent browser-to-device connections globally. Our performance metrics speak for themselves.
< 15 ms
Median Data Latency
P95 latency is consistently under 25ms for the full browser-to-device round trip across continental networks, rivaling local area network performance due to our P2P focus.
99.999%
Connection Uptime
Guaranteed uptime for the Orchestration Service, backed by multi-region redundancy and failover logic that ensures the data path itself is resilient to 99% of network interruptions.
1,000,000+
Concurrent Devices
Our Nexus Orchestration layer can handle handshake and session management for over a million devices simultaneously, with linear horizontal scaling built into the core architecture.
Stop Integrating, Start Innovating.
Tired of managing VPNs, configuring firewall exceptions, and debugging unstable cloud brokers? Rezor Bridge abstracts away the complexity of device connectivity, letting your team focus on building amazing browser-based user experiences. The transition is seamless, the performance is immediate, and the security is unbreakable. Take control of your connected ecosystem today and redefine what real-time interaction truly means for your business.
Launch Your Pilot ProjectDeployment options for on-premise, hybrid cloud, and fully managed SaaS.
In-Depth: The Nexus Protocol & Data Integrity
The Nexus Protocol is the internal language of Rezor Bridge, a binary protocol specifically designed for efficiency over high-latency and potentially lossy networks. Unlike general-purpose protocols like HTTP/2 or standard WebSockets, Nexus packets include an optimized header for device identifiers, command integrity checks (using a fast CRC mechanism), and a sequence numbering system for reliable reassembly at the application layer. This bespoke design minimizes protocol overhead, ensuring that payload delivery is prioritized, especially for continuous streams like sensor data. Every Nexus packet is encrypted using ChaCha20-Poly1305, providing authenticated encryption with associated data (AEAD) which guarantees both confidentiality and data origin authentication, preventing man-in-the-middle injection attacks. The protocol also features adaptive rate limiting, allowing the Device Agent to signal network congestion back to the browser client, enabling client-side throttling to prevent overwhelming resource-constrained edge hardware. This bi-directional feedback mechanism is a core part of its low-latency resilience, ensuring the connection degrades gracefully rather than failing outright.
Furthermore, data integrity is maintained through sophisticated deduplication and ordering buffers. Even when packets arrive out of order—a common occurrence in P2P internet connections—the WASM Client Module and Device Agent collaboratively reconstruct the original message stream. For commands, the Atomic Command Execution (ACE) feature leverages this integrity system to assign unique transaction IDs (TIDs) that are tracked across network sessions. If a browser closes mid-transaction and the command was sent, the Device Agent holds the command in a pending state, preventing double execution if the browser re-connects. If a time-out occurs, a designated rollback command or default state is enforced, guaranteeing the device state remains consistent and safe. This level of transactional safety is paramount for industrial and robotics applications where incorrect or repeated commands can lead to equipment damage or safety hazards. This commitment to data integrity from the physical layer to the application layer differentiates Rezor Bridge from standard IoT communication platforms that rely solely on best-effort delivery.
The Resilience Layer: Handling Disconnection Gracefully
A major challenge in browser-to-device communication is handling the inherent instability of public internet connections and mobile networks. Rezor Bridge incorporates a multi-layer resilience system. First, the connection initiation uses a smart multiplexing strategy, simultaneously attempting both WSS and WebRTC data channels, opting for the lowest-latency successful connection. Second, a complex exponential backoff and jitter algorithm is used for automatic re-connection attempts, designed to minimize network flooding during widespread outages. Crucially, the Dynamic Device Shadowing feature acts as a persistent local cache. When the browser loses connection, the UI remains fully responsive, operating on the last-known state (the 'shadow'). Any user interactions (e.g., toggling a switch, sending a configuration update) are immediately applied to the shadow and placed in a prioritized, encrypted queue. When the connection is re-established, the queue is transmitted in a single burst, with a pre-flight check against the Device Agent's current state to resolve potential conflicts, all without requiring user intervention. This approach provides users with a seamless, "always-on" experience even when the physical connection is intermittent, which is a major breakthrough for remote diagnostics where technicians might be using the application in low-connectivity areas. The local buffering capabilities extend up to 1GB of queued data, ensuring even prolonged disconnections in the field do not result in lost commands or configurations.
Deployment Flexibility and Environmental Footprint
Rezor Bridge supports three primary deployment models: Public SaaS, Hybrid, and Fully On-Premise. The Public SaaS model utilizes our global Orchestration Service network for maximum speed and zero infrastructure overhead for the customer. The Hybrid model allows the customer to host the Device Agent and integrate with their existing security and networking infrastructure, while utilizing our Orchestration Service for external connectivity—ideal for regulated industries. The Fully On-Premise model allows hosting the entire Rezor Bridge stack (Orchestration Service included) within the customer's private data center or air-gapped network. This offers the highest level of security and control, meeting strict military or governmental standards. Regardless of the deployment model, the resource consumption of the Device Agent is meticulously optimized. The C library for embedded systems operates with an average CPU utilization of less than 1% on ARM Cortex-M4 architectures, and the memory footprint is typically under 100KB of flash and 32KB of RAM, making Rezor Bridge the most environmentally friendly and low-power solution for massive-scale IoT deployments. The use of WebAssembly in the browser is equally efficient, leading to lower battery drain on mobile devices and a faster overall user experience compared to heavy JavaScript-based communication libraries. This efficiency translates directly into lower operational costs and extended battery life for field devices.