Zoster
Zoster is a Webflow theme by Templates ($99). Tested on 2026-10-05 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 60 for mobile speed and 79 for desktop speed, 91/91 for SEO and 91/91 for accessibility (mobile/desktop, 0–100). Note: its demo home page is heavy — 35 MB — heavier than a typical store, so the speed score may understate the theme.
Mobile60
Desktop79
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 60 | 79 |
| SEO | 91 | 91 |
| Accessibility | 91 | 91 |
| Best practices | 96 | 96 |
Single preset · measured 2 times since 2026-10-05 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Zoster home page
Mobile
Speed 60 · 40 points to gain
- −25 Largest Contentful Paint medium effort
- −5.3 Speed Index medium effort
- −5.1 First Contentful Paint medium effort
- −4.8 Total Blocking Time medium effort
- 900 ms Reduce unused JavaScript high effort
- 150 ms Reduce unused CSS high effort
SEO 91 · 9 points to gain
- −9.1 Document does not have a meta description low effort
Accessibility 91 · 9 points to gain
- −3.3 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −3.3 Links do not have a discernible name medium effort
- −1.4 Heading elements are not in a sequentially-descending order medium effort
- −1.4 Document does not have a main landmark. medium effort
Best practices 96 · 4 points to gain
- −3.8 Browser errors were logged to the console medium effort
Desktop
Speed 79 · 21 points to gain
- −10 Largest Contentful Paint medium effort
- −9.6 Total Blocking Time medium effort
- −1 Speed Index medium effort
- 160 ms Reduce unused JavaScript high effort
SEO 91 · 9 points to gain
- −9.1 Document does not have a meta description low effort
Accessibility 91 · 9 points to gain
- −3.3 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −3.3 Links do not have a discernible name medium effort
- −1.4 Heading elements are not in a sequentially-descending order medium effort
- −1.4 Document does not have a main landmark. medium effort
Best practices 96 · 4 points to gain
- −3.8 Browser errors were logged to the console medium effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| Zoster default demo ↗ | 60 | 91 | 91 | 79 | 91 | 91 | 2026-10-05 |
| home ↗ | 60 | 91 | 91 | 79 | 91 | 91 | 2026-10-05 |
Show this score on your site
A live badge: it always shows Zoster's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/webflow/zoster-website-template"><img src="https://themestested.com/badge/webflow/zoster-website-template.svg" alt="Zoster speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.