Local-first desktop app

The developer's toolkit for web testing & security.

Desktop workspace for HTTP inspection, API testing, and security research. Intercept requests, replay traffic, and debug endpoints in real time.

macOS available now · Windows build in progress

Hexbuffer live traffic workspace showing captured HTTP requests next to the raw request and response editors
  • Runs entirely on your machine
  • No account required
  • No cloud dependency

Built-in modules for every phase of testing.

Dedicated desktop tools engineered for web application reconnaissance, traffic analysis, and vulnerability discovery.

HTTP History

Core Proxy
View documentation

Live Traffic Stream & Deep Inspection

Capture and inspect every HTTP and HTTPS transaction in real-time. Analyze request headers, query parameters, multipart bodies, and response latency with zero lag.

Real-time bidirectional stream capture
Header, cookie, and body inspectors
Instant search and status filtering

Who is Hexbuffer for?

Tailored for security engineers, penetration testers, and developers requiring fast, private local reconnaissance.

Penetration Testers

A dedicated local workstation for intercepting, inspecting, and manipulating live target HTTP traffic.

Security Researchers

Deep request and response payload inspection with automated fuzzing and token tampering.

Developers & QA

Debug web APIs, mock scenarios, and verify endpoint behavior with instant request replay.

Try Hexbuffer on your next target.

Install from the terminal, point the proxy at your target, and start inspecting traffic in minutes.

Always improvingOpen to feedbackWindows build in progress