Fiddler

Fiddler

Progress Software
FlowLens

FlowLens

Magentic AI
+
+

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About

Capture all HTTP(S) traffic between your computer and the Internet with Telerik Fiddler HTTP(S) proxy. Inspect traffic, set breakpoints, and fiddle with requests & responses. Fiddler Everywhere is a web debugging proxy for macOS, Windows, and Linux. Capture, inspect, monitor all HTTP(S) traffic between your computer and the Internet, mock requests, and diagnose network issues. Fiddler Everywhere can be used for any browser, application, process. Debug traffic from macOS, Windows, or Linux systems and iOS or Android mobile devices. Ensure the proper cookies, headers, and cache directives are transferred between the client and server. Supports any framework, including .NET, Java, Ruby, etc. Mock or modify requests and responses on any website. It’s a quick and easy way to change the request and responses to test websites without changing code. Use Fiddler Everywhere to log all HTTP/S traffic between your computer and the Internet.

About

FlowLens is an AI-native debugging and session-recording tool that captures everything needed for correct, context-aware bug diagnosis and lets AI coding agents fix bugs autonomously. With a simple browser extension and optional MCP server, FlowLens records full user sessions, including video of the UI, network-request data, console logs, user interactions (clicks, inputs, navigation), storage state (cookies, local/session storage), system info, and more, all synchronized on a unified timeline. Once a bug is reproduced, FlowLens bundles that complete context into a single “flow” that can be shared via link. AI coding agents compatible with MCP (such as those from major providers) can then load the flow, inspect network activity, error logs, UI state, and user inputs, and automatically analyze root causes and suggest or even generate code fixes. This removes the need for manual replays, copying and pasting logs, or writing verbose bug descriptions.

Platforms Supported

Windows Supported
Mac Supported
Linux Supported
Cloud Not Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Anyone who needs an effective web debugging proxy

Audience

Software developers and engineering teams looking for a solution to accelerate debugging by giving AI coding agents full browser-session context

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Not Supported

API

Offers API Supported

Screenshots and Videos

Screenshots and Videos

Pricing

$12 per user per month
Free Version Supported
Free Trial Not Supported

Pricing

$11 per month
Free Version Supported
Free Trial Not Supported

Reviews/Ratings

Overall 5.0 / 5
ease 5.0 / 5
features 5.0 / 5
design 5.0 / 5
support 5.0 / 5

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Pros & Cons from Real Users

Pros

  • I'm using fiddler to find the vulnerabilities of the application. We can perform penetration testing using fiddler and find several major security-related issues such as CSRF Attack, XSS Attack, SQL Injection, IDOR, Authentication & Authorization, File Upload, Password strength. Fiddler provides a detailed overview of the application URLs and with status code and protocols. We can quickly analyze the security test results by their priority and severity and export them. Fiddler is a web debugging proxy tool and supports multiple proxies such as Firefox, Chrome, Safari, Internet explorer. We need to export the certificate by fiddler and import it on the browser's network settings section. - Open-source penetration testing tool. - It supports any client-server ar. - Tracking cache, cookies & headers - Traffic recording and playback mechanism - Easy to learn and use it. - Decrypt HTTP and HTTPS traffics - Formation of any HTTP request feature - Autoresponder & Inspection feature - We can manipulate the sessions - We can perform Load testing as well. - It available in multiple flavors like Fiddler Everywhere, Fiddler Classic for Windows, FiddlerCore, and FiddlerCap.

Cons

  • No Cons. It is very useful for me during security testing. Thank you, Fiddler.

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

Progress Software
Founded: 1981
United States
www.telerik.com/fiddler

Company Information

Magentic AI
United Kingdom
magentic.ai/

Alternatives

Alternatives

HttpMaster

HttpMaster

Borvid
HttpWatch

HttpWatch

Neumetrix

Categories

API Testing Supported
Bug Tracking Supported
Debugging Supported
Packet Analyzers Supported
Packet Capture Supported

Categories

Debugging Supported

Integrations

Claude Code Not Supported
Cloudchipr Supported
Cursor Not Supported
Devin Desktop Not Supported
Gemini CLI Not Supported
GitHub Copilot Not Supported
Model Context Protocol (MCP) Not Supported
OpenAI Codex Not Supported
Visual Studio Code Not Supported

Integrations

Claude Code Supported
Cloudchipr Not Supported
Cursor Supported
Devin Desktop Supported
Gemini CLI Supported
GitHub Copilot Supported
Model Context Protocol (MCP) Supported
OpenAI Codex Supported
Visual Studio Code Supported
Claim Fiddler and update features and information
Claim Fiddler and update features and information
Claim FlowLens and update features and information
Claim FlowLens and update features and information