HTTP Debugger is unclaimed —

HTTP Debugger

Debug HTTP API Calls to Backends·httpdebugger.com

HTTP Debugger Pro is a Windows tool that captures, inspects, and modifies HTTP, HTTPS, HTTP/2, WebSocket, Server-Sent Events, and gRPC traffic system-wide without requiring browser proxy setup. It lets developers view request/response details, replay and edit captured requests, mock server responses, and analyze traffic with filters, highlighting, and charts. It also supports capturing traffic from local servers and AI agents.

What it's for

Debug HTTP API calls between apps and backendsCapture traffic from browsers, desktop apps, services, Java and .NET clients, and local serversInspect WebSocket frames, Server-Sent Events, gRPC messages, and HTTP/2 streamsReplay and modify HTTP requestsSimulate server responses and errors with Auto-ReplyRedirect TCP connections to staging or mock serversDebug OAuth and OIDC loginsDebug CORS errorsDebug localhost trafficInspect AI agent and copilot traffic streamsExport captured traffic to Excel, JSON, XML, CSV, TXT, or binary

Features 22

Auto-Reply to mock server responses
Bookmarks for tagging requests
Context menu quick actions per request
Dark and light themes
Domain-and-path structure tree of captured traffic
Export to Excel, XML, JSON, CSV, TXT, or binary
Free Express version for sharing sessions with clients/QA
gRPC message inspection over HTTP/1.1 and HTTP/2
Highlighting rules for errors, slow requests, and oversized responses
HTTP/2 connection tree view
HTTP/2 stream inspection
Modify Headers to rewrite response headers/body
Quick filters and filter rules to narrow captured traffic
Request and Response detail panels with headers, cookies, JSON/XML trees, hex, and timing
Save and restore full capture sessions
Server-Sent Events (including compressed SSE) capture
Session-wide charts by host, content type, response size, and response time
Submitter for editing and resubmitting captured requests
System-wide HTTP/HTTPS traffic capture without proxy setup
TCP/IP Redirector to redirect connections to another server
URL/Base64/Hex converter
WebSocket frame inspection

At a glance

free tierfree trial

TypeDesktop app

DeploymentInstalled (local)

PlatformsWindows

Fordevelopers, engineers, QA testers

CompanyMadeForNet

Integrations

Microsoft Excel

Resources

Changelog

Pricing

A 'Purchase' link and a 'See pricing' link exist on the site, but plan prices for HTTP Debugger Pro are not publicly listed.

ExpressFree

Free Express version can be shipped to clients or QA to view a session file with the exact reproduction flow.