Why Is My React Website Showing a Blank Page After Deployment?

A React application can work perfectly during development and still display a completely blank page after deployment.

That can be confusing because the deployment may report success. A blank page does not necessarily mean the hosting server is down. Often, the HTML loads but the JavaScript application fails to start correctly.

Common causes include incorrect asset paths, JavaScript runtime errors, missing environment variables, incorrect routing configuration, or a production build that is being served incorrectly.

Quick Answer

If a deployed React website shows a blank page, open the browser Developer Tools, check the Console for JavaScript errors, open Network and look for failed JavaScript or CSS requests, open the production build locally if possible, confirm the deployment is serving the correct build output, check environment variables required by the application, check the application's base path, and if using client-side routing, verify the hosting configuration. The browser Console is usually the best first place to look.

Check the Browser Console First

Open the deployed React website, open Developer Tools, go to Console, reload the page, and look for errors. A JavaScript runtime error can prevent React from rendering the application. For example, the application may fail during initialization because a required value is missing or an imported resource cannot be loaded. Do not assume the hosting server is the problem until you inspect the browser error.

Check Failed JavaScript Requests

Open the Network tab and reload the page. Look for requests for JavaScript, CSS, images, fonts, and other application assets. If JavaScript files return errors, React may never start. A failed JavaScript request can be caused by incorrect asset paths, incorrect base URL, missing files, wrong deployment directory, caching, or hosting configuration.

Verify the Production Build

A React development server is not the same thing as a production deployment. Create the production build using the commands required by your project. Then inspect the generated output. Depending on your setup, the output directory can differ. For Vite projects, the default production output is commonly dist, unless the project configuration changes it. Do not assume every React project uses the same directory.

The important point is that the hosting server must serve the actual production output.

Test the Production Build Before Uploading

If possible, test the production build locally before deploying it. This helps separate an application problem from a hosting problem. If the production build already shows a blank page locally, fix the application first. If it works correctly when served locally but fails after deployment, investigate the hosting environment, paths, routing, caching, or environment configuration.

Check Environment Variables

A common source of deployment-only failures is environment configuration. Your development machine may have environment variables that are not available in production. For example, an application may expect an API URL, authentication configuration, a public application key, or a feature setting. If that value is missing, application startup may fail.

Check your framework's documentation for how production environment variables are defined and exposed. Do not expose private server secrets in client-side React code.

Check the Base Path

If your application is hosted at the domain root, the application may behave differently than if it is hosted under a subdirectory. Asset URLs and routing can depend on the deployment path. If JavaScript and CSS requests are going to the wrong location, inspect the generated HTML and network requests.

Check React Router Configuration

If you use React Router, distinguish between a blank application, a 404 after refreshing a route, and a JavaScript error. They can look similar to a user but have different causes. If the homepage loads but refreshing a route fails, the issue may involve server-side fallback configuration. If even the homepage is completely blank, inspect the Console and JavaScript requests first.

Check the Deployment Directory

Make sure your hosting provider is serving the production output directory. For example, if your build produces dist but the server is configured to serve another directory, the deployed application may not work correctly. Check the actual files being served rather than relying only on the deployment status message.

Check Browser Cache

If you recently deployed a fix, test the site using a private browser window, another browser, or another device. This can help determine whether an older JavaScript bundle is being served.

A Better Debugging Sequence

When React shows a blank page, use this order: open Console, reload, identify the first meaningful error, check Network, check JavaScript requests, check CSS requests, test the production build locally, verify environment variables, verify base-path configuration, check routing only after the application itself loads, and check hosting configuration. Do not change five things at once.

If the problem disappears, you may never know which change actually fixed it.

Common Mistakes

Assuming a Successful Deployment Means the App Works

A deployment system can successfully upload and serve files while the application itself fails at runtime.

Only Checking the Homepage

Test the actual routes your users need.

Ignoring the Console

A blank screen often looks mysterious until the first JavaScript error is visible.

Using Development Environment Variables in Production

Local development configuration is not automatically available on the production server.

Changing Router Configuration Immediately

If the entire application is blank, check JavaScript errors and asset loading before changing routing rules.

FAQ