Harbor
Harbor 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 55 for mobile speed and 92 for desktop speed, 85/85 for SEO and 92/94 for accessibility (mobile/desktop, 0–100).
Mobile55
Desktop92
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 55 | 92 |
| SEO | 85 | 85 |
| Accessibility | 92 | 94 |
| Best practices | 100 | 100 |
Single preset · measured 10 times since 2026-11-04 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Harbor home page
Mobile
Speed 55 · 45 points to gain
- −25 Largest Contentful Paint medium effort
- −7.5 Total Blocking Time medium effort
- −7.2 Speed Index medium effort
- −5.6 First Contentful Paint medium effort
- 2.7 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 92 · 8 points to gain
- −5.5 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −2.3 Heading elements are not in a sequentially-descending order medium effort
Desktop
Speed 92 · 8 points to gain
- −5.4 Total Blocking Time medium effort
- −2 Largest Contentful Paint medium effort
- −1 Speed Index 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 94 · 6 points to gain
- −4.1 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −1.7 Heading elements are not in a sequentially-descending order medium effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| Harbor default demo ↗ | 55 | 85 | 92 | 92 | 85 | 94 | 2026-11-04 |
| home ↗ | 55 | 85 | 92 | 92 | 85 | 94 | 2026-11-04 |
Show this score on your site
A live badge: it always shows Harbor's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/squarespace/harbor-fluid-demo"><img src="https://themestested.com/badge/squarespace/harbor-fluid-demo.svg" alt="Harbor speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.