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Fiddler

Free · Debugging · Proxy

Fiddler is a free web debugging proxy that captures HTTP and HTTPS traffic between your device and the internet. It allows developers to inspect, modify, and replay requests. Fiddler is widely used for testing, debugging, and performance analysis of web applications.

HTTP/HTTPS traffic capture

Request modification and replay

Performance analysis

Web session inspection

Customizable with extensions

Cross-platform support

System Requirements

Windows 7/8/10/11
macOS 10.13+
Linux (any)
1 GB RAM
100 MB disk