NotebookLM Code Highlighter by Alex

NotebookLM Code Highlighter transforms plain code blocks in Google NotebookLM into beautifully formatted, syntax-highlighted snippets.

FEATURES
• Automatic language detection for 25+ programming languages
• 6 color themes: GitHub, VS Code, and Atom One (light & dark variants)
• Line numbers for easy reference
• One-click copy button
• Respects your system's light/dark mode preference
• Adjustable max height for long code blocks

SUPPORTED LANGUAGES
JavaScript, TypeScript, Python, Java, C, C++, C#, Go, Rust, Ruby, PHP, Swift, Kotlin, SQL, Bash, Shell, JSON, XML, HTML, CSS, SCSS, Markdown, YAML, Dockerfile, GraphQL, and Plain Text.

HOW IT WORKS
The extension automatically detects code blocks on notebooklm.google.com and applies syntax highlighting in real-time. You can manually override the detected language using the language picker, and your preference is remembered for that code block.

PRIVACY
This extension runs entirely in your browser. It does not collect, store, or transmit any user data. No analytics, no tracking, no ads.

OPEN SOURCE
View the source code and report issues on GitHub.