Getting StartedInstall Fiddler on Windows 11 (2026 Guide)
Step-by-step 2026 guide to install Fiddler on Windows 11 — covering Fiddler Classic, Fiddler Everywhere, HTTPS decryption, and modern TLS troubleshooting.
Read moreHTTP Debugging & Web Analysis
Master Fiddler & Debug Like a Pro
Discover expert tutorials on Fiddler, master HTTP/HTTPS traffic capture, modify requests and responses, debug mobile apps, and unlock the full power of web debugging. Your Fiddler journey starts here.
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Getting Started
Install Fiddler, explore the interface, and capture your first HTTP request
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HTTP/HTTPS Capture
Master HTTPS decryption, certificate installation, and traffic filtering
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Request Modification
Use AutoResponder, Composer, and breakpoints to modify requests
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Performance Analysis
Analyze load times, waterfall charts, and optimize web performance
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Mobile Debugging
Debug iOS and Android apps with Fiddler proxy configuration
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API Testing
Test REST APIs, GraphQL endpoints, and WebSocket connections
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Advanced Techniques
FiddlerScript, extensions, automation, and power-user workflows
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Troubleshooting
Solve common issues, fix certificate errors, and debug problems
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Advanced TechniquesDecoding Fiddler SAZ Files: Format, Tools & Automation
Learn the SAZ file format internals, how to inspect it without Fiddler, and access HTTP(S) sessions programmatically using .NET, Python, and PowerShell — essential for advanced fiddler debugging and automation.
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TroubleshootingReset Fiddler to Factory Defaults: A Developer’s Recovery Guide
Step-by-step guide to reset Fiddler to factory defaults — fix broken HTTPS decryption, restore HTTP debugging reliability, and recover from misconfiguration.
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Getting StartedFiddler Setup Guide: First-Time Configuration Made Simple
A step-by-step Fiddler setup guide for beginners: install Fiddler Classic, enable HTTPS decryption, configure proxy settings, validate traffic, and avoid common pitfalls.
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Request ModificationFiddler AutoResponder: Mock API Responses Like a Pro
Master Fiddler AutoResponder to mock API responses instantly — with JSON mocks, status codes, delays, regex rules, and HTTPS decryption support.
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HTTP/HTTPS CaptureDecrypt HTTPS Traffic in Fiddler: The Complete SSL/TLS Guide
A complete, step-by-step Fiddler tutorial for HTTPS decryption — including TLS 1.3 support, mobile device setup, certificate trust, and troubleshooting tips.
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Stay updated with the latest Fiddler tutorials, HTTP debugging guides, request modification tips, and web traffic analysis techniques.
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