Free Font Optimization Checker — Detect Font Loading Issues
Identify web font loading issues causing CLS, LCP delays, and Flash of Unstyled Text (FOUT) on your pages.
Free — no account required for a single check. Sign up for continuous monitoring →
What the Font Optimization Checker checks
Font preload status
Font-display strategy
FOUT / FOIT detection
Font file sizes
Self-hosted vs CDN font analysis
CLS from font loading
How it works
Analyses font loading waterfall and CSS font declarations to identify issues with font rendering strategy and their impact on Core Web Vitals.
Monitor continuously — not just once
This free tool runs a one-off check. AuditJet monitors your site on a schedule — alerting you when scores change, before performance regressions affect your rankings and revenue.
Font Optimization Checker — FAQ
Is the Font Optimization Checker free?
Yes — Font Optimization Checker is completely free to use. No account required for a single-URL check.
How does the Font Optimization Checker work?
Analyses font loading waterfall and CSS font declarations to identify issues with font rendering strategy and their impact on Core Web Vitals.
What does the Font Optimization Checker check?
Font preload status. Font-display strategy. FOUT / FOIT detection. Font file sizes. Self-hosted vs CDN font analysis. CLS from font loading.
How is this different from Google PageSpeed Insights?
Google PageSpeed Insights is a one-off manual tool. AuditJet adds continuous monitoring, regression alerting, and revenue impact on top of the same performance analysis — so you're notified when scores change, not just when you remember to check.