Zest

Median of 5 presets · measured 30 times since 2026-09-11 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.

Mobile

Speed 80 · 20 points to gain

• −14.5 Largest Contentful Paint medium effort
• −4.2 Speed Index medium effort
• −1.1 First Contentful Paint medium effort

• 150 ms Reduce unused CSS high effort

SEO 92 · 8 points to gain

• −7.7 Image elements do not have `[alt]` attributes low effort

Accessibility 80 · 20 points to gain

• −4 `[aria-*]` attributes do not match their roles medium effort
• −4 Elements with an ARIA `[role]` that require children to contain a specific `[role]` are missing some or all of those required children. medium effort
• −4 Image elements do not have `[alt]` attributes low effort
• −2.8 ARIA input fields do not have accessible names medium effort
• −2.8 Background and foreground colors do not have a sufficient contrast ratio. medium effort
• −2.8 Links do not have a discernible name medium effort

Best practices 96 · 4 points to gain

• −3.8 Browser errors were logged to the console medium effort

Desktop

Speed 67 · 33 points to gain

• −23.7 Total Blocking Time medium effort
• −7.7 Speed Index medium effort
• −1.5 Largest Contentful Paint medium effort

SEO 92 · 8 points to gain

• −7.7 Image elements do not have `[alt]` attributes low effort

Accessibility 84 · 16 points to gain

• −4 Elements with an ARIA `[role]` that require children to contain a specific `[role]` are missing some or all of those required children. medium effort
• −4 Image elements do not have `[alt]` attributes low effort
• −2.8 ARIA input fields do not have accessible names medium effort
• −2.8 Background and foreground colors do not have a sufficient contrast ratio. medium effort
• −2.8 Links do not have a discernible name medium effort

Best practices 96 · 4 points to gain

• −3.8 Browser errors were logged to the console medium effort