Debug Your Network Traffic to Deliver
High-Quality
Products
Solutions
Customer Service
Support
Code
Fixes
Fiddler Everywhere enables you to capture, analyze, modify, and replay web traffic, including SignalR, WebSockets, MessagePack, SSE, gRPC, Protobuf. It allows you to intercept and inspect HTTP requests, responses, headers, cookies, and payloads with unparalleled visibility, enabling precise diagnosis and prompt resolution of network-related issues.
Why Choose Fiddler Everywhere?
Fiddler Everywhere is a modern, easy-to-use web debugging proxy for macOS, Windows, and Linux. It’s a high-performance cross-platform tool for any browser or system.
Fiddler Everywhere offers detailed documentation and dedicated support, ensuring you can rely on expert assistance every step of the way to enhance your network traffic debugging processes.
All You Need to Debug Network Traffic
Accessible Snapshots
Store, organize, reload, and share your session’s snapshots that contains previously captured traffic.
Customizable Filters
Concentrate on what’s important by showing only targeted traffic based on your оwn matching criteria.
Powerful Capturing Modes
System Proxy Capturing, Network Capturing, Browser capturing, and Terminal capturing.
Traffic Manipulation and Debugging
Modify traffic, set debug breakpoints, create custom modification rules and filters to automate session manipulation.
Compose Requests
Quickly create, modify, execute and save API request.
Decoding of Multiple Protocols
HTTP/2, SignalR, WebSockets, MessagePack, SSE, gRPC, Protobuf.
Unparalleled Visibility Into Traffic
View detailed request and response headers, bodies, cookies, raw, time, duration, including HEX, TLS version, certificate information and detailed size information.
Enterprise-Ready Network Debugging Tool
- Policy-driven Installation and Patching
- Managed App Configuration
- Industry Compliance and
- Offline Mode
Key Features of Fiddler Everywhere
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Powerful Capturing
Seamlessly track in depth with the advanced Browser, Terminal and Network Capturing capabilities in addition to the System proxy.
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Advanced Filters
Multiple approaches to search and filter traffic information, allowing you to promptly narrow down network related issues.
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Multiple Protocols
Capture and decode traffic in detail, including HTTP/2, SignalR, WebSockets, MessagePack, SSE, gRPC, Protobuf.
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Extensive Rules
Create custom rules – modify headers, redirect requests, change response content, set breakpoints to exercise precise control over web traffic.
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API Composer
Create, analyze and modify requests to gain deeper insights into how your web applications and services behave.
Enable Web Debugging for Anyone
on Your Team
Debug network traffic - with Fiddler Everywhere you can capture, inspect, alter, and replay network traffic - on any browser, any device, and any platform.
Test new features and legacy code by inspecting network traffic and composing rules to diagnose potential problem scenarios, before they occur in production.
Use Fiddler Everywhere to quickly inspect and diagnose customer issues faster than ever before.
Fiddler Everywhere is а Feature-Rich Debugging Tool
Capture
Inspect
- Timings, Sizings, Statistics
- Traffic Inspectors
- Replay Traffic
- Find in Traffic
- Filter Traffic
- Save Filters
- Compare Traffic (Beta)
Edit & Modify
Share & Collaborate
- Export, Import & Share Traffic Snapshots
- Export, Import & Share Saved Rules
- Save & Share Composer Requests
Work in Restricted Environment
Security & Compliance
- SOC2
- GDPR
- HIPAA
- ISO
Upcoming Features
- Import Settings from FC to FE
- Auth Inspector
- Keyboard Shortcuts
What Users Say
We use Fiddler as a proxy in our development process. We're able to save countless hours by running code locally instead of publishing changes. This makes it very easy to test and confirm code changes work properly before pushing anything to production.
Fiddler made it easy for us to work on different projects set up in different environments. Fiddler enables us to work on all projects simultaneously with very minimal settings needed for each project. It not only increases our productivity (users need to learn less applications) but also reduces costs (reduces the number of applications needed to buy).
I appreciate Progress Telerik Fiddler's intuitive interface and robust web debugging capabilities, providing seamless navigation and invaluable insights into HTTP traffic for optimal application performance.
Best Proxy Server Tool I have used. For web developers, it is one of the advanced tools with the simplest UI in the business. Easy to use. Lots of features.
It's so simple to use, really easy to filter out requests to only see the bits that you are actually interested in. It's such a useful and well-built project that I insist all developers on my team have it so that they can use it for debugging and to aid in building new integrations. Invaluable tool. Cannot recommend it enough.
Frequently Asked Questions
What's New in Fiddler Everywhere
Keyboard Shortcuts
New keyboard shortcuts to speed up task execution!
Auth Inspector Tab for Requests
The new Auth Inspector tab in Fiddler Everywhere provides a dedicated space for analyzing authentication details in requests.
Redesigned Rules Logic and UI
Redesigned Rules UI and logic, making it easier to create and manage rules effectively!
Support and Learning
Blog Post
Video
Additional Fiddler Tools
There’s a Fiddler Product for Every Need
Fiddler Classic
Original Fiddler Web Debugger tool — feature rich, functional and supported only on Windows.
FiddlerCore
Reliable and powerful .NET library allowing you to capture and modify HTTP and HTTPS traffic.
Fiddler Cap
A lightweight companion tool to capture web traffic from end-users or from customer environments.
