Code Previewer

VS Code-like viewer for local source code files opened via file:// URLs

View local source code files beautifully — right in your browser. Code Previewer replaces the browser's plain-text view of local files (file:// URLs) with a VS Code-like viewer featuring syntax highlighting, line numbers, and code folding. FEATURES • Syntax highlighting for 25+ file types: Python, JavaScript, TypeScript, JSON, YAML, HTML, CSS, Java, Go, Rust, C/C++, SQL, XML, Markdown, Shell scripts, Dockerfile, and more • 4 themes: Light, One Dark, GitHub Light, Dracula • Compare mode: side-by-side diff of two files with change highlighting • Markdown preview with a resizable split view and draggable divider • Search within file (Ctrl+F), word wrap (Alt+Z), code folding • Copy, download, and reload buttons; full-screen mode • Handles large files smoothly; fully offline — your files never leave your computer IMPORTANT — ONE-TIME SETUP After installing, open the extension's Details page and enable "Allow access to file URLs". The extension does nothing without it. PRIVACY No data is collected or transmitted. Everything runs locally in your browser. The only stored setting is your theme preference.