Check 5 / 12 LOW impact In the full checklist
System font for body, Inter only for headings
What this check is
A display font in the body text costs a download on every page for very little gain. Using the system font for body copy and reserving the brand font for headings cuts the font payload without changing the identity.
How to implement it
Set the body stack to the platform system font, load one brand weight for headings and one for the brand wordmark at most, and subset the font to the characters actually used. Check the text reflow when the custom font loads.
How to verify it
Count the font files requested on a product page: at most the heading weight should download from your domain, and no text should visibly reflow when it loads.
All 197 checks, one Google Sheet
This page is the summary. The full checklist carries the priority, the impact score and the tool link for every check — all 197 of them, across 14 categories, as a Google Sheet and CSV with lifetime updates.
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