Test HTML code with built-in server simulation. Preview your web applications in a server-like environment without complex setup. Free, instant, and powerful.
Our HTML viewer simulates a local web server environment directly in your browser. Test HTML pages with proper HTTP context, AJAX requests, and server-side behavior - all without installing Apache, Nginx, or any server software.
Test your HTML code in a realistic server environment
Simulates a local web server environment directly in your browser. Test HTML pages with proper HTTP context.
Automatically resolves relative file paths for CSS, JavaScript, and images. Test multi-file projects seamlessly.
Test AJAX requests and Fetch API calls in server context. Debug XMLHttpRequest without CORS issues.
View and inspect HTTP headers, content types, and server responses in real-time.
Proper MIME type handling for HTML, CSS, JavaScript, images, and other resources.
Bypass CORS restrictions during development. Test cross-origin requests without server configuration.
Creates a virtual file system in your browser that mimics a real server directory structure.
Simulates server-side URL routing and path resolution for realistic testing.
Handles external resource loading with proper HTTP semantics and headers.
Monitor all HTTP requests made by your HTML page in real-time.
Test AJAX requests and API calls without deploying to a server. Debug fetch operations in realistic environment.
Preview complete websites with multiple HTML pages, CSS files, and JavaScript modules.
Test HTML forms with realistic server context. Debug form submissions and validation.
Build and test single-page applications with proper routing simulation.
Test REST API integration and external service calls in server environment.
Teach web development concepts that require server context without complex setup.
Start testing HTML code with free server simulation. No setup, no configuration required.
Launch HTML Viewer with Server →