Clarkson
Clarkson is a Squarespace theme by Squarespace (Free). Tested on 2026-11-04 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 66 for mobile speed and 95 for desktop speed, 85/85 for SEO and 89/92 for accessibility (mobile/desktop, 0–100).
Mobile66
Desktop95
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 66 | 95 |
| SEO | 85 | 85 |
| Accessibility | 89 | 92 |
| Best practices | 100 | 100 |
Single preset · measured 14 times since 2026-11-04 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Clarkson home page
Mobile
Speed 66 · 34 points to gain
- −25 Largest Contentful Paint medium effort
- −4.9 Speed Index medium effort
- −3.5 First Contentful Paint medium effort
- 2.3 s Reduce unused JavaScript high effort
- 750 ms Reduce unused CSS high effort
SEO 85 · 15 points to gain
- −7.7 Document does not have a meta description low effort
- −7.7 Links do not have descriptive text low effort
Accessibility 89 · 11 points to gain
- −5.5 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −5.5 Touch targets do not have sufficient size or spacing. medium effort
Desktop
Speed 95 · 5 points to gain
- −2.7 Total Blocking Time medium effort
- −2.2 Largest Contentful Paint medium effort
- 120 ms Reduce unused CSS high effort
SEO 85 · 15 points to gain
- −7.7 Document does not have a meta description low effort
- −7.7 Links do not have descriptive text low effort
Accessibility 92 · 8 points to gain
- −4.1 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −4.1 Touch targets do not have sufficient size or spacing. medium effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| Clarkson default demo ↗ | 66 | 85 | 89 | 95 | 85 | 92 | 2026-11-04 |
| home ↗ | 66 | 85 | 89 | 95 | 85 | 92 | 2026-11-04 |
Show this score on your site
A live badge: it always shows Clarkson's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/squarespace/clarkson-fluid-demo"><img src="https://themestested.com/badge/squarespace/clarkson-fluid-demo.svg" alt="Clarkson speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.