Freedom251 › Network Protocol Analyzers
HTTP Debugger
What HTTP Debugger is
HTTP Debugger is a Windows developer tool for capturing, inspecting, editing, and replaying HTTP and HTTPS traffic. System-level capture covers browsers, desktop applications, command-line tools, local servers, and AI agents without changing proxy settings. It handles HTTP/1.1, HTTP/2, WebSocket, Server-Sent Events, and gRPC traffic. Request and response panels show headers, cookies, URL parameters, JSON and XML trees, images, highlighted bodies, hexadecimal data, and timing. Developers can edit and resend requests, or change and simulate traffic with Auto-Reply, Modify Headers, and TCP redirection. An included MCP server lets Claude Code, Codex, and other MCP clients read captured sessions and analyze them. The software imports HAR and SAZ sessions plus Fiddler Classic rules, and exports captures to Excel, XML, JSON, CSV, TXT, or binary formats. HTTP Debugger Pro costs $129, paid once per license, including a lifetime license and one year of updates. A free seven-day trial requires no registration. HTTPS decryption requires installing its root certificate in Windows Trusted CA.
Who it suits
HTTP Debugger suits Windows developers working with browser, desktop, command-line, server, or AI-agent traffic. It is useful when request editing, replay, response mocking, protocol inspection, or MCP-based analysis is needed.
What it does well
- System-level capture needs no proxy changes
- Supports HTTP/1.1, HTTP/2, WebSocket, SSE, and gRPC
- Requests can be edited and replayed
- MCP server supports Claude Code and Codex
- Exports to common data formats
What to know first
- Windows-only platform
- No free plan
- HTTPS decryption requires a trusted root certificate
- Purchase includes one year of updates
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Pro | Lifetime license · One year of product updates · Technical support · 30-day money-back guarantee | $129, paid once |
| HTTP Debugger Pro | per license · 1–4 licenses: $129 each · 5–9: $116.10 each (−10%) · 10–24: $109.65 each (−15%) · 25–49: $103.20 each (−20%) · 50–99: $96.75 each (−25%) · 100+: $90.30 each (−30%) · Lifetime license · 1 year of updates | $129, paid once |
| Maintenance renewal | per license · 1 year of updates · Tech support · 1–4 licenses: $89 each · 5–9: $80.10 each (−10%) · 10–24: $75.65 each (−15%) · 25–49: $71.20 each (−20%) · 50–99: $66.75 each (−25%) · 100+: $62.30 each (−30%) | $89 a year |
As httpdebugger.com lists them, read 20 Sept 2026. The maker's own page has the final word.
Verdict
HTTP Debugger combines broad protocol capture with detailed inspection, traffic modification, replay, and MCP analysis. Its Windows focus and certificate requirement for HTTPS decryption are important setup considerations.
Facts from HTTP Debugger's own pages
- AI integration
- The product ships an MCP server that lets Claude Code, Codex, and other MCP clients read captured sessions and analyze them. · httpdebugger.com, 9 Oct 2026
- Capture scope
- System-level capture supports browsers, desktop applications, CLI tools, local servers, and AI agents without changing system proxy settings. · httpdebugger.com, 9 Oct 2026
- Founded
- 2007 · httpdebugger.com, 28 Sept 2026
- Import and export
- It imports HAR and SAZ sessions and Fiddler Classic rules, and exports captures to Excel, XML, JSON, CSV, TXT, or binary. · httpdebugger.com, 9 Oct 2026
- Intended users
- The maker describes HTTP Debugger Pro as a developer tool and lists use with browsers, desktop apps, CLI tools, local servers, and AI agents. · httpdebugger.com, 9 Oct 2026
- License and support
- Purchase includes a lifetime license, one year of updates, technical support, and a 30-day money-back guarantee. · httpdebugger.com, 9 Oct 2026
- Privacy
- The privacy policy says collected customer information is used for update and product notifications and is not shared outside the organization; website servers log visitor IP and browser information for site administration and traffic analysis. · httpdebugger.com, 9 Oct 2026
- Protocols
- The product captures HTTP/1.1, HTTP/2, WebSocket, Server-Sent Events, and gRPC traffic. · httpdebugger.com, 9 Oct 2026
- Purpose
- HTTP Debugger captures, inspects, and replays HTTP/HTTPS traffic from browsers, desktop applications, and AI agents without changing proxy settings. · httpdebugger.com, 9 Oct 2026
- Request inspection
- Request and response panels include viewers for headers, cookies, URL parameters, JSON and XML trees, images, highlighted bodies, hex, and request timing. · httpdebugger.com, 9 Oct 2026
- Security behavior
- The EULA states that decrypting HTTPS traffic requires installing an HTTP Debugger root certificate in the Windows Trusted CA list. · httpdebugger.com, 9 Oct 2026
- Support response
- The contact page says the company usually replies within one business day. · httpdebugger.com, 9 Oct 2026
- Traffic modification
- Submitter can edit and resend requests, while Auto-Reply, Modify Headers, and TCP redirection can change or simulate traffic. · httpdebugger.com, 9 Oct 2026
- Trial
- The maker advertises a free seven-day trial with no registration. · httpdebugger.com, 9 Oct 2026
Where HTTP Debugger stands on Freedom251
- Network Protocol Analyzers#24 of 30
- Network Packet Analyzer Software#27 of 32
- Web Debugging Proxies#23 of 27