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OpenThunder Cloud

Understand any repository in your browser.

See how a codebase actually works: how requests move from screen to database, what it is built with, and what needs attention. Nothing to install, and no AI key needed.

Scan my repository Try an example first

Sign in to scan your own repository. The examples below need no account.

Try it on a project you know

Six popular open-source projects, analyzed by the same engine you get. Instant, no sign-in.

PythonTypeScript★ 46k Full Stack FastAPI Template A React frontend, a FastAPI backend, and PostgreSQL: a complete web app template from the FastAPI author. 23 traced flows 23 routes 2 services See the report → Java★ 9.6k Spring PetClinic The classic Spring Boot sample: a veterinary clinic app with controllers, repositories, and a relational database. 14 traced flows 15 routes 2 services See the report → C#★ 11k eShop Microsoft's reference .NET store: catalog, ordering, basket, and webhooks services with events, PostgreSQL, Redis, and AI search. 27 traced flows 29 routes 7 services See the report → Go★ 10k Go Clean Architecture A widely used example of clean architecture in Go: HTTP handlers, use cases, and a MySQL repository. 4 traced flows 4 routes 1 services See the report → Rust★ 27k axum Rust's most popular web framework, with dozens of small example apps (databases, auth, websockets, and more). 84 traced flows 87 routes 3 services See the report → C++★ 14k Drogon A fast C++ web framework, with controllers, an ORM, and example servers. 28 traced flows 31 routes 2 services See the report →

How it works

  1. 1
    Pick a repository

    Upload a folder from your browser, paste a GitHub link, or connect OpenThunder running on your computer.

  2. 2
    OpenThunder maps it

    It reads the code itself: routes, calls between front end and back end, database tables, packages, and settings. No AI key, and the same answer every time.

  3. 3
    See what matters

    Follow any feature step by step to the exact file and line, check the technology in depth, and review security and AI-agent findings.

What you get

Feature flows

Each request traced from the page or client call, through the route and the code, to the table or outside service it reaches.

Technology in depth

Packages by role with installed versions and where they are used, outside services, runtime versions, settings, and how it ships.

Security and AI-agent checks

Security findings in your code, plus hidden or hostile instructions in the files AI coding agents read (AGENTS.md, CLAUDE.md, MCP configs).

Works across languages

TypeScript and JavaScript, Python, Java, C#, Go, Rust, and C/C++, plus Kotlin, Ruby, PHP, Scala, and Elixir.

Your code, your choice

  • Upload: only text source files are sent. Dependencies, build output, the .git folder, and binaries are skipped. Uploads are held in a temporary workspace and deleted after 30 minutes.
  • Keep it local: connect OpenThunder on your own computer and nothing is uploaded at all.
  • No AI by default: everything above is computed directly from the code. AI explanations are optional and only run when you ask.

Ready to see your own code this way?

Scan my repository Or download the desktop app