About HTTP Debugger
HTTP Debugger is a Windows traffic analyzer that captures, inspects, and replays HTTP/HTTPS traffic from browsers, desktop apps, services, Java and .NET clients, and local servers without changing proxy settings. It supports HTTP/2, WebSocket, Server-Sent Events, and gRPC messages. The tool is used by thousands of companies and has been available since 2007.
Key features
- Captures HTTP and HTTPS requests system-wide without proxy setup
- Inspects headers, bodies, cookies, JSON/XML, HTTP/2 details, WebSocket frames, Server-Sent Events, and gRPC messages
- Replays and modifies HTTP sessions, simulates server responses, rewrites HTTP headers, and redirects TCP connections
- Captures and analyzes AI agent traffic streams over WebSocket, SSE, gRPC, and HTTP/2
- Ships an MCP server for AI agents to read and analyze captured traffic
- Offers Excel export capacity
Good fit for
- Debugging HTTP API calls between apps and backends
- Testing microcontrollers in IoT architectures
- Debugging OAuth web requests
HTTP Debugger: questions and answers
- What is HTTP Debugger used for?
- HTTP Debugger captures, inspects, and replays HTTP/HTTPS traffic from Windows apps without changing proxy settings. It is a good fit for debugging HTTP API calls between apps and backends, testing microcontrollers in IoT architectures, and debugging OAuth web requests.
- Is HTTP Debugger open source?
- No. HTTP Debugger is proprietary (closed-source) software. In the Developer Tools category, open-source options include Ventoy, Rufus and Notepad++.
- What are some alternatives to HTTP Debugger?
- HTTP Debugger competes with Fiddler, Proxyman and Charles Proxy.
Open-source alternatives to HTTP Debugger
See all
Ventoy
Developer Tools
A new bootable USB solution.
GPL-3.0★ 80k
Rufus
Developer Tools
The Reliable USB Formatting Utility
GPL-3.0★ 38k
Notepad++
Developer Tools
Notepad++ official repository
OSSvs Sublime Text★ 30k
Wakapi
Developer Tools
📊 A minimalist, self-hosted WakaTime-compatible backend for coding statistics
MITvs WakaTime★ 4.4k
Sourcerer
Developer Tools
🦄 Sourcerer app makes a visual profile from your GitHub and git repositories.
MIT★ 6.7k
Visual Studio Code
Developer Tools
Visual Studio Code
MITvs Sublime Text★ 194k
SaaS alternatives to HTTP Debugger
See all
Fiddler
API Tools
Telerik web debugging proxy for inspecting HTTP and HTTPS traffic
SaaS
Proxyman
API Tools
Native macOS HTTP debugging proxy for inspecting app network traffic
SaaSCharles Proxy
API Tools
HTTP and HTTPS debugging proxy for inspecting and rewriting traffic
SaaS
APXY
API Tools
Network proxy for developers and AI agents to inspect and debug traffic
SaaS
Araxis Merge
Developer Tools
Visual comparison and merging tool for files, folders and documents
SaaS
DBC Utility
Developer Tools
Desktop workspace to inspect, edit, compare and review CAN and CAN FD DBC files
SaaS

