Localhost Tunneling
Meets Chaos Engineering.
Expose your local server securely. Then break it on purpose. Simulate 3G latency, packet loss, and inspect traffic — all in one tool.
Test Resilience with Real-World Network Conditions
Deliberately inject chaos into your tunnel to discover how your app handles the real world.
Latency Injection
Simulate slow mobile networks. Add artificial delay (e.g., 3G, 500ms) to every request passing through the tunnel.
Jitter & Packet Loss
Randomize packet arrival or drop connections randomly to test reconnection logic and error handling.
Bandwidth Throttling
Emulate constrained environments by limiting upload/download speeds to test under real-world conditions.
Smart API Mocking
Backend not ready? No problem. Intercept requests and return custom JSON responses instantly without touching your codebase.
Wildcard Subdomain Routing
Run your entire microservice ecosystem locally. EntropyTunnel dynamically routes traffic based on the first DNS label. Spin up ui.your-tunnel and api.your-tunnel simultaneously to perfectly mirror your production environment.
The Request Pipeline
Every request flows through a series of intelligent stages, each providing powerful capabilities for development and testing.
Public Internet
External request hits your tunnel URL
MockEngine
Short-circuits with canned responses
ChaosEngine
Injects latency & packet loss
RequestRouter
Resolves target URLs and routes traffic
LocalForwarder
Rebuilds HTTP messages and executes them
Localhost
Your dev server receives the request
Each stage is independently configurable through the localhost:4040 dashboard or via the command-line interface. Chain together multiple capabilities to create sophisticated testing scenarios.
Command Control on localhost:4040
Every agent embeds a blazingly fast React dashboard. Manage chaos rules, monitor live traffic, and auto-discover multiple agents running on your machine — all from a beautiful local UI.
http://localhost:4040
Navigation
Latency: 500ms
Active Agents
142 requests
89 requests
Recent Requests
Real-Time Monitoring
Watch requests flow through your tunnel in real-time
Instant Configuration
Toggle chaos rules and mocks without restarting
Multi-Agent Discovery
Automatically detect all agents on your network
Beyond the Tunnel: An Advanced Debugging Suite
Stop console.logging everything. Use built-in tools to inspect, replay, and secure your traffic without changing your code.
Full-body request inspection. Failed webhook? Hit "Replay" to resend the exact payload instantly.
Up and Running in Three Steps
From zero to chaos-tested tunnel in under a minute.
Start Server
Launch your local dev server with Docker, Node, or .NET. EntropyTunnel works with any stack.
Connect & Configure
Run the agent, set up auth rules, IP whitelists, and circuit breakers in one command.
Inject Chaos & Inspect
Enable chaos mode. Simulate real-world networks while inspecting and replaying traffic live.
The Ultimate Comparison
See what you've been missing with standard tunneling tools.