How to Fix Flash of Unstyled Text (FOUT)
Fonts loading late cause visible text to swap, hurting CLS and polish.
Symptoms you'll see
A FOUT/FOUT happens when a web font loads after the text renders in a fallback font, causing a visible swap and layout shift.
Why it happens
Late font swaps shift layout (CLS) and look unprofessional, signalling a lower-quality experience.
Step-by-step fix
Preload critical fonts (font-display: swap or optional), self-host or use a fast font CDN, subset fonts to needed characters, and preload the woff2.
How SEO Surgeon catches it
Our engine flags pages with layout instability likely caused by late fonts and recommends preloading.
Find your biggest SEO opportunities in minutes
Upload your Google Search Console export and AI hands you a prioritised roadmap — lost clicks, CTR gaps, revenue leakage, and exactly what to fix first. Your first analysis is free.