Asynchronous CSS
What it does
Asynchronous CSS loads stylesheets in a non-blocking way so the browser can paint content sooner. When Divi Critical CSS is enabled, Nitro leaves Divi’s above-the-fold styles alone so the two features do not conflict.
Where to find it
Divi Engine → Nitro Settings → Scripts & CSS → Asynchronous CSS
Settings
| Setting | Type | Default | What it does |
|---|---|---|---|
| Enable Asynchronous CSS | Toggle | Off | Load CSS asynchronously. Turn off if styles flash or look wrong |
| Exclude WooCommerce CSS | Toggle | Off | Keep Woo styles loading normally. Balanced and Aggressive presets turn this on with Async CSS |
| Exclude Custom CSS Queue | Text | empty | Comma-separated handles with no spaces (for example divi-style). Add divi-nitro-styles to exclude CSS generated by Nitro Minify |
Use the Frontend Asset Helper to find handles.
warning
Async CSS is a common cause of broken styling. Turn it off early when troubleshooting — see Nitro broke my site.