Code Search Engine

Cs.android.com

Explore Android's open source code online

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Browse and search through Android open source code to explore, reference, and learn from real project files and implementations.

Cs.opensource.google

Search and explore Google open source code

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Browse and search open source code from Google projects. Find, explore, and learn from real-world codebases and development best practices.

Searchfox.org

Search and explore Mozilla Firefox source code

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Searchfox lets you search and explore Mozilla Firefox source code in C++, Rust, and JavaScript, making it easy to find code and understand the project.

Grep.app

Search millions of GitHub repos instantly

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Search code, files, and paths instantly across millions of public GitHub repositories for faster discovery and reference.

Entrian.com

Instant code search in Visual Studio

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Entrian offers a Visual Studio add-in that lets you quickly search your source code with fast, flexible full-text search right inside your IDE.

Codesearch.debian.net

Find code in any Debian package instantly

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Search across the entire source code of Debian packages to quickly find code snippets, function names, and references in open-source projects.

Heap.space

Search and explore code with smart helpers

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A code search tool providing intelligent helper actions for symbols under your mouse cursor to streamline code navigation.

Linux.no

Search and browse Linux source code online

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Browse, search, and cross-reference the Linux source code online. LXR helps you explore code structure and relationships for easier understanding.