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Productivity: Debugging

The Telerik and Kendo UI 2025 Q1 Release Is Here—See What’s New!

FeaturedImage by Iva Borisova February 12, 2025 5 min read

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  • Productivity Debugging

    Fiddler ImageView Enhancements

    The latest Fiddler beta v2.4.2.5 (targeting .NET2 or .NET4) includes several improvements to the ImageView Response Inspector. While its appearance remains mostly unchanged, the new version provides much more insight into the metadata often included with image files. Read on for more details.
    by Eric Lawrence
    May 27, 2021 7 min read
  • Productivity Debugging

    Fiddler ImageView GeoLocation

    In my previous post, I discussed the recent enhancements to Fiddler’s ImageView extension that expose metadata about image files under inspection. My initial goal in exposing metadata was to help you optimize the size of images in order to build faster websites. However, in some cases the privacy implications of such metadata can be of far greater concern.
    by Eric Lawrence
    May 27, 2021 3 min read
  • Productivity Debugging

    Manipulating Traffic with Fiddler Extensions

    A key advantage Fiddler has over a traditional packet sniffer or in-browser network monitor is the ability to modify the traffic. This can be done manually (using breakpoints and Inspectors) or automatically, using FiddlerScript or extensions. In today’s post, I’d like to introduce one such extension—ContentBlock
    by Eric Lawrence
    May 27, 2021 5 min read
  • Productivity Debugging

    Capturing Traffic from .NET Services with Fiddler

    When Fiddler launches and attaches, it adjusts the current user’s proxy settings to point at Fiddler, running on 127.0.0.1:8888 by default. That means that traffic from most applications automatically flows through Fiddler without any additional configuration steps.
    by Eric Lawrence
    March 10, 2025 2 min read
  • Productivity Debugging

    Evaluating Certificates in Fiddler and FiddlerCore

    In this post, I’ll demonstrate a proposal called Convergence, which attempts to detect targeted attacks against HTTPS traffic—for instance, from within a specific locale or country. Here’s how Convergence works: when the client connects to a HTTPS site, it obtains its certificate. It then consults a set of servers around the world, called notaries, and checks to see whether the site in question is sending the same certificate to all of those servers as well.
    May 27, 2021 6 min read
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