Web Safe Font Stack Generator
Create optimized fallback stacks matching your Google Font dimensions. Prevent flashing unstyled texts and cumulative layout shifts.
Font Settings
Visual Comparison (Superimposed)
System typeface fallbacksSystem typeface fallbacks
Web Font
System Fallback
CSS Stack Code
Frequently Asked Questions
What are web safe fonts?
Web safe fonts are system typefaces pre-installed on practically all operating systems (Windows, macOS, Linux, iOS, Android). Examples include Arial, Georgia, Times New Roman, and Trebuchet MS.
Why use web safe fallback stacks?
Using safe fallbacks prevents Cumulative Layout Shift (CLS) while custom fonts are loading. If your fallback font matches the aspect ratio of your target font, elements won't resize layout bounds on load.
What is size-adjust in CSS @font-face?
CSS `size-adjust` scales fallback character coordinates to match the visual footprint of your web font, normalizing heights to match perfectly.