Generate optimized CSS @font-face fallback stacks to eliminate Cumulative Layout Shift (CLS) caused by font loading.
Drag and drop or browse: we'll auto-extract the font name for the next step.
Please enter a font name.
Preview is forced to line-height: normal so this override takes effect. Most production sites use a numeric line-height — the override won't have any visible effect there.
Showing:
Compare what users see while the font loads, with and without the tuned fallback. The shifting block is highlighted in red.
Copy or download this CSS to integrate it into your site. Don't forget to save your work too if you want to find it again in the database.
Your configuration will be reviewed by an admin before being published.
Optional. Your name will be displayed as the creator of this fallback.
Adjust the simulated loading delay to mimic a specific network condition. The test will use this value until you switch presets.