Xniffer
A non-intrusive Swift network profiler for debugging and monitoring iOS app requests and responses.
What is Xniffer?
Xniffer is a Swift network profiler framework for iOS that intercepts and logs HTTP/HTTPS requests and responses. It helps developers debug network issues, monitor performance metrics like latency, and inspect API calls in real-time without modifying existing networking code significantly.
iOS developers and mobile engineers who need to debug, profile, or optimize network interactions in their apps, especially those using URLSession or Alamofire for API communications.
Developers choose Xniffer for its non-intrusive setup, real-time visual feedback via an overlay window, and seamless integration with existing URLSession configurations, providing a lightweight alternative to manual logging or external proxy tools.
Overview
A swift network profiler built on top of URLSession.
Use Cases
Best For
- Debugging API request/response payloads in iOS apps
- Monitoring network latency and performance issues
- Inspecting HTTP headers and status codes during development
- Profiling network calls in apps using Alamofire
- Real-time network traffic visualization without external proxies
- Adding network debugging to existing projects with minimal code changes
Not Ideal For
- Projects requiring cross-platform or server-side network monitoring
- Apps where floating UI overlays are prohibited due to design or testing constraints
- Teams using networking libraries other than URLSession or Alamofire without custom integration
- Production environments where minimal overhead and security are critical, as interception adds middleware layer
Pros & Cons
Pros
Setup requires just a few lines of code to add as middleware to URLSession, as shown in the basic usage example, minimizing disruption to existing projects.
Provides a floating window overlay that displays live request details like URLs, headers, and latency, enhancing debugging efficiency without external tools.
Supports .window, .console, and .custom observers, allowing developers to choose between visual, log-based, or custom implementations for varied workflows.
Works seamlessly with Alamofire by configuring SessionManager, making it easy for projects using this popular library without extra overhead.
Cons
Only supports iOS 9.0+ and not other Apple platforms like macOS or watchOS, restricting its use in broader ecosystem debugging.
Built solely on URLSession, so it may not intercept requests from other networking libraries without additional custom setup, limiting scope.
The default .window mode adds a floating element that can interfere with app UI or testing if not properly managed or disabled in production.
Frequently Asked Questions
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