From CDN to browser cache, troubleshoot icon rendering issues
FontAwesome icons not showing (blank square, garbled text, or not rendering) is one of the most common issues in development. Causes range from simple CDN link typos to complex CORS cross-origin problems. This article compiles 10 verified troubleshooting methods and solutions, ordered from most common to rarest, to help you quickly locate and resolve the issue.
The CDN link may be incorrect, misspelled, or the version number does not match
Verify the CDN URL is correct and the version number matches your usage
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.7.2/css/all.min.css">Verify URL version and path spelling, check Network panel to confirm CSS loaded successfully (status code 200).
Using wrong CSS prefix (mixing fa, fas, far, fa-solid across versions)
Use the correct prefix for your FontAwesome version
<i class="fa-solid fa-house"></i>
<i class="fa-regular fa-user"></i>
<i class="fa-brands fa-github"></i>Each version has its own prefix system - v4 uses fa, v5 uses fas/far/fab, v6+ uses fa-solid/fa-regular/fa-brands
CDN version and the class names used in your code do not match
Ensure CDN version matches the class names you are using
<!-- v6/v7 CSS (using fa-solid / fa-regular / fa-brands prefix) -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.7.2/css/all.min.css">For example, using fa-solid class with a v4 CDN that only supports fa prefix
Ad blockers or security extensions may block font file loading
Try switching to another CDN to bypass blocking.
<!-- Try switching to another CDN to bypass blocking -->
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@fortawesome/[email protected]/css/all.min.css">When page loads via HTTPS but FontAwesome resources via HTTP, all modern browsers will block loading insecure HTTP resources due to security policies.
Always use HTTPS protocol for all CDN resource references
<!-- Always use HTTPS for CDN resources -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.7.2/css/all.min.css">Always use HTTPS for CDN resources
When CSS and font files are hosted on different domains without proper CORS headers, browsers block cross-origin font file loading due to same-origin policy.
If self-hosting, ensure server adds Access-Control-Allow-Origin: * header for font files.
Nginx config example:
location /fonts/ {
add_header Access-Control-Allow-Origin "*";
expires 30d;
}The icon name may be misspelled or not exist in the version you are using
Check the icon name in the FontAwesome icon library and verify it exists in your version
<!-- First test a known icon to rule out other issues -->
<i class="fa-solid fa-star"></i> <!-- Star icon, exists in all versions -->
<i class="fa-solid fa-house"></i> <!-- House icon, exists in v6+ -->
<i class="fa-solid fa-home"></i> <!-- home exists in v5 and earlier -->SVG framework requires JavaScript initialization to replace icon elements
Check Console panel for JS errors, ensure dom.watch() is called.
import { library, dom } from '@fortawesome/fontawesome-svg-core'
import { fas } from '@fortawesome/free-solid-svg-icons'
// Add icons to the library
library.add(fas)
// Import and register the icons you want to use
dom.watch()Without proper initialization, tags will not be replaced with SVG icons
Browser may be caching an old version of the CSS file
Ensure URL version matches your actual version.
<!-- Ensure URL version matches your actual version -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.7.2/css/all.min.css">CSS and font file paths are incorrect when self-hosting
Verify all file paths are correct and files are accessible in the browser Network panel
assets/
├── css/
│ └── all.min.css # FontAwesome CSS file
└── webfonts/
├── fa-solid-900.woff2 # Solid style font file
├── fa-regular-400.woff2
├── fa-brands-400.woff2
└── ... # Other font filesEnsure the relative or absolute paths in your CSS match the actual file locations