Download Fiddler Classic
Get started with the free web debugging proxy tool exclusively for Windows.
Download for Windows*
*Please be aware that Fiddler Classic is not in active development and offers no commitments for releases, patches or tech support. By using this product, you assume all associated risks. We recommend upgrading to Fiddler Everywhere.
Do More with Fiddler Everywhere
Go beyond Fiddler Classic and try Fiddler Everywhere for free. Take advantage of our modern web debugging solution expertly designed for Windows, Mac, or Linux. You get access to:
- Amplified networking debugging features
- An attractive and intuitive UI
- Choreographed releases with new features and enhancements
- Dedicated technical support
Fiddler Classic does not Support Your OS
Fiddler Everywhere
Supports your Linux OS
Try Fiddler Everywhere
Start a free trial of our best-in-class network debugging solution expertly designed for Linux. Cross-platform debugging is easier than ever with:
- Amplified networking debugging features
- An attractive and intuitive UI
- Choreographed releases with new features and enhancements
- Dedicated technical support
Try Fiddler Everywhere
Fiddler Classic does not Support Your OS
Fiddler Everywhere
Supports your macOS
Try Fiddler Everywhere
Start a free trial of our best-in-class network debugging solution expertly designed for macOS. Cross-platform debugging is easier than ever with:
- Amplified networking debugging features
- An attractive and intuitive UI
- Choreographed releases with new features and enhancements
- Dedicated technical support
Try Fiddler Everywhere
Характеристики
Описание
Версии
Обновлено
Совместимость
Windows 7, Windows 8, Windows 10
Описание
Fiddler — это мощный, бесплатный инструмент для отладки веб-сервисов. Используется для тестирования производительности и безопасности веб-ресурсов, перехвата и декодирования HTTP/HTTPS трафика, отладки трафика с Windows, macOS и Linux систем, и мобильных устройств (iOS и Android). Также позволяет манипулировать веб-сессиями.
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Fiddler lets you inspect traffic, set a breakpoint, and ‘fiddle’ with any incoming or outgoing data. Fiddler includes a robust event-based scripting system that can be extended using any .NET Framework language.
Easily edit web sessions: simply set a breakpoint to pause processing of the session and then authorize alteration of the response/request. You can compose your own HTTP requests and then run them via Fiddler.
Fiddler allows you to see the “total page weight.” Also, it lets you see HTTP compression and caching at a glance. In fact, you can isolate performance bottlenecks with simple rules such as “Flag any uncompressed responses larger than 35kb.”
Fiddler decrypts HTTPS traffic and displays and modifies web application requests using «man-in-the-middle» decryption techniques. You can configure Fiddler to decrypt all traffic or only specific sessions that you need. Benefit from rich extensibility modeling, that ranges from simple FiddlerScript to very powerful extensions that can be developed using a .NET Framework language.
Fiddler ensures that proper headers, cookies, and cache directives are transferred between clients and the server.
Fiddler (for Windows) is a free Web Debugging Proxy that logs all HTTP(S) traffic between the Internet and your computer.
Features:
- Customizable Free Software Tool
- HTTP/HTTPS Traffic Recording
- List of ready-made add-ons
- Performance Testing
- Security Testing
- Set Break-points
- Web Session Manipulation
- Web Debugging
Fiddler is freeware that can debug Internet traffic from virtually any application device that supports a proxy.
System Requirements:
- Disk Space: 8MB
- Framework: Fiddler2 requires .NET v2, Fiddler4 requires .NET v4
- Memory: 2 GB+ recommended
- Processor: 1GHz
- Supported Operating Systems: (Windows XP/Vista/7/8/10)
Excellent for debugging and network troubleshooting.
Allows modification of network traffic.
Supports numerous internet protocols and technologies.
Not user-friendly, especially for beginners.
Limited features in the free version.
Occasional performance issues can slow productivity.
👨💻️ USER REVIEWS AND COMMENTS 💬
image/svg+xmlBotttsPablo Stanleyhttps://bottts.com/Florian Körner
John Ketchell
I hate having to debug faulty software. It is extremely time-consuming and annoying. I feel the Fiddler software product helps streamline the process and make it a lot easier to understand and perform. This was amazing really and ultimately a product that stands out as unique and fitting a niche.
image/svg+xmlBotttsPablo Stanleyhttps://bottts.com/Florian Körner
A1SCA9REYZD5W2
Fiddler is a proxy server that works on Hypertext Transfer Protocol and is used as debugging application. It is used to trace or log all the HTTP traffic between the internet and the System and used to inspect the traffic. It’s mainly used for web debugging.
image/svg+xmlBotttsPablo Stanleyhttps://bottts.com/Florian Körner
Ben
Torrez
This won’t be for everyone, as it is designed to fit a specific demographic. There is the ability to track cookies, and make sure those cookies are being transferred correctly. The program also allows the user to adapt the program in order to best fit their needs. No matter what type of business you have, this product will make you able to accomplish your needs. Including performance testing and traffic recording, there’s a wide range of capabilities to meet business needs.
image/svg+xmlBotttsPablo Stanleyhttps://bottts.com/Florian Körner
Tyler
Fiddler is used for the purpose of proxy server debugging tool for Windows. It controls traffic between computers and web servers like HTTP and HTTPS. It also captures and records these traffic problems. It launches and adjusts this User’s proxy settings so that traffic flows automatically.
image/svg+xmlBotttsPablo Stanleyhttps://bottts.com/Florian Körner
Riley
The Fiddler is a proxy server capture the web tool traffic between the computer and webserver. It allowing you to capture and modify http and https traffic
image/svg+xmlBotttsPablo Stanleyhttps://bottts.com/Florian Körner
Lewis
Fiddler software is a proxy tool used for debugging. Helps in logging all the HTTPs on our system and internet also.Web developer are the most common users of this software. Some of the important features of this tool is debugging, capturing traffic. It also helps in the replacing of Postman to test a webs API.It performs an easy way for navigations .another key feature of this software is proving filters to the hosts,not only hosts protocols and also URLs. This can perform multiple operations . Filtering and monitoring are the main roles performed by this software.Trubleshooting issues are easily handled using fiddler. Technical details are shared without any issues. This is a simple software to deal with.
image/svg+xmlBotttsPablo Stanleyhttps://bottts.com/Florian Körner
Calum
This is a great debugger! It helped me get rid of all my virus and the bugs that my computer had. Buy this product its really great.
image/svg+xmlBotttsPablo Stanleyhttps://bottts.com/Florian Körner
James Meckley
Fiddler is a web debugging proxy that logs all HTTP(S) traffic between your computer and the internet. It can be used to debug traffic from virtually any application that supports a proxy, including web browsers and mobile devices. It can also be used to debug performance issues and security vulnerabilities.
image/svg+xmlBotttsPablo Stanleyhttps://bottts.com/Florian Körner
John S**********o
I have used Fiddler software for some time now and I’m very pleased with it. It is a great tool for debugging and inspecting web traffic. The user interface is intuitive and easy to use. It has plenty of features that make it a great application for troubleshooting web related issues. It also allows for monitoring of web traffic in real time making it easy to detect any abnormalities. It is also useful for testing web application performance. The support from the Fiddler team is also great and they always respond quickly to any questions. Overall I’m very satisfied with this software.
image/svg+xmlBotttsPablo Stanleyhttps://bottts.com/Florian Körner
Aaron A*******y
Fiddler is an excellent tool for debugging web traffic. It allows for easy inspection of traffic exchanges between the browser and web server. I particularly like the ability to set breakpoints in the traffic to investigate specific requests. It also has some useful security features, like the ability to block malicious requests. The interface is intuitive and easy to use.
image/svg+xmlBotttsPablo Stanleyhttps://bottts.com/Florian Körner
Oliver Heuser
Fiddler is an amazing tool for debugging web traffic. It’s easy to use and understand and the interface is intuitive.
image/svg+xmlBotttsPablo Stanleyhttps://bottts.com/Florian Körner
Fraser Molaro
Fiddler is a useful tool for analyzing and debugging web traffic, allowing users to quickly identify and solve potential issues.
image/svg+xmlBotttsPablo Stanleyhttps://bottts.com/Florian Körner
Dylan E***********h
Fiddler is a useful tool for monitoring and analyzing HTTP/HTTPS traffic.
image/svg+xmlBotttsPablo Stanleyhttps://bottts.com/Florian Körner
Matthew
Fiddler is a robust web debugging tool that allows you to monitor and manipulate network traffic. It provides real-time monitoring of your application’s HTTP and HTTPS traffic. The most significant feature of this software is its ability to intercept, visualize, and modify traffic between a client and a server, making it invaluable in debugging application issues.
image/svg+xmlBotttsPablo Stanleyhttps://bottts.com/Florian Körner
Connor
An invaluable tool for debugging, testing and analyzing HTTP/HTTPS traffic in real-time across multiple devices.
image/svg+xmlBotttsPablo Stanleyhttps://bottts.com/Florian Körner
Finn
Robust tool for debugging HTTP traffic.
Inspect, modify HTTP/HTTPS traffic.
Helps analyze web traffic, troubleshoot HTTP issues, and test APIs.
Fiddler has the ability to act as a proxy server to capture both HTTP and HTTPS traffic for the purpose of debugging web applications. The original author, Eric Lawrence, released the first version of Fiddler around 18 years ago. It has now been recognized as the most popular web debugging proxy tool.
In addition to being able to decrypting HTTPS traffic, the captured traffic can be modified as well. This capability to fiddle with requests and responses is the reason why the debugger is named Fiddler. To avoid any security warning, you may install Fiddler’s root certificate.
Features and Highlights
After the installer window opens, it only takes two clicks to finish the installation. The first click is to agree the typical license agreement that most users never bother to read, and the second one is to click on the Next button unless you want to change the location of the installation folder.
Soon a new tab will open in your default browser, letting you know that the installation is successful and providing you with a few guides on how to start using Fiddler, how to configure it for a specific Windows version, how to use it to decrypt HTTPS traffic, and how to monitor traffic to localhost from IE or .NET.
Fiddler ignores HTTPS traffic by default. If you want to capture and decrypt it, you will have to enable a specific option in the Fiddler Options panel. The option is located on the HTTPS tab. Put a check mark on the “Decrypt HTTPS Traffic”, press the OK button, and you’re all set.
If you have a specific host that you don’t want Fiddler to decrypt, you can exclude it from the HTTPS decryption by entering the hostname in the Skip Decryption box, hit the OK button, and then restart Fiddler.
If there is an application you want Fiddler to skip from the traffic decryption, or if you just need Fiddler to decrypt HTTPS traffic of one host, Fiddler provides a powerful feature called FiddlerScript that allows you to modify the OnBeforeRequest function for the specific decryption.
In addition to FiddlerScript, the capabilities of Fiddler can be extended by developing extensions, and anyone interested can create such extensions by using .NET language.
Any transaction between a server and a client is captured as a web session which shows up in the Web Session List along with some information such as request, response, timers, and flags. All sessions can be saved in a compressed file format called Session Archive Zip (SAZ).
Captured sessions can also be stored in other formats by using Exporter extensions. On the other hand, the support for Importer extension makes it possible for Fiddler to use traffic data stored in HTTP Archive (HAR) format as well as other formats.
Fiddler Free Download for Windows
Among the many things it can do, Fiddler can decrypt HTTPS traffic, modify requests and responses, and store sessions for later viewing. Of course, there are other things it cannot do as well. You’ll probably find out everything Fiddler can and cannot do after using it for a while. You can click the link below to download Fiddler for Windows:
Features
Description
Versions
Updated
Compatibility
Windows 7, Windows 8, Windows 10
Description
Fiddler is a powerful, free tool for debugging web services. It is used for performance and security testing of web resources, intercepting and decoding HTTP/HTTPS traffic, debugging traffic from Windows, macOS and Linux systems, and mobile devices (iOS and Android). It also allows you to manipulate web sessions.
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