Sidney
Sidney is a Squarespace theme by Squarespace (Free). Tested on 2026-10-28 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 58 for mobile speed and 80 for desktop speed, 92/92 for SEO and 94/93 for accessibility (mobile/desktop, 0–100).
Mobile58
Desktop80
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 58 | 80 |
| SEO | 92 | 92 |
| Accessibility | 94 | 93 |
| Best practices | 100 | 100 |
Single preset · measured 8 times since 2026-10-14 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Sidney home page
Mobile
Speed 58 · 42 points to gain
- −25 Largest Contentful Paint medium effort
- −9.8 First Contentful Paint medium effort
- −6.1 Speed Index medium effort
- −1.2 Total Blocking Time medium effort
- 3.7 s Reduce unused JavaScript high effort
- 760 ms Reduce unused CSS high effort
SEO 92 · 8 points to gain
- −7.7 Document does not have a meta description low effort
Accessibility 94 · 6 points to gain
- −6 Background and foreground colors do not have a sufficient contrast ratio. medium effort
Desktop
Speed 80 · 20 points to gain
- −18 Largest Contentful Paint medium effort
- −1.8 Speed Index medium effort
- 410 ms Reduce unused JavaScript high effort
- 120 ms Reduce unused CSS high effort
SEO 92 · 8 points to gain
- −7.7 Document does not have a meta description low effort
Accessibility 93 · 7 points to gain
- −6.6 Background and foreground colors do not have a sufficient contrast ratio. medium effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| Sidney default demo ↗ | 58 | 92 | 94 | 80 | 92 | 93 | 2026-10-28 |
| home ↗ | 58 | 92 | 94 | 80 | 92 | 93 | 2026-10-28 |
Show this score on your site
A live badge: it always shows Sidney's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/squarespace/sidney-fluid-demo"><img src="https://themestested.com/badge/squarespace/sidney-fluid-demo.svg" alt="Sidney speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.