Plasma
Plasma is a Astro theme by Rob Austin (Paid). Tested on 2026-09-12 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 79 for mobile speed and 98 for desktop speed, 100/100 for SEO and 90/90 for accessibility (mobile/desktop, 0–100).
Mobile79
Desktop98
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 79 | 98 |
| SEO | 100 | 100 |
| Accessibility | 90 | 90 |
| Best practices | 100 | 100 |
Single preset · measured 2 times since 2026-09-12 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Plasma home page
Mobile
Speed 79 · 21 points to gain
- −17.8 Largest Contentful Paint medium effort
- −1.3 Cumulative Layout Shift medium effort
- −1 Speed Index medium effort
- −0.9 First Contentful Paint medium effort
- 450 ms Reduce unused JavaScript high effort
Accessibility 90 · 10 points to gain
- −5 `[aria-*]` attributes do not have valid values medium effort
- −5 Buttons do not have an accessible name medium effort
Desktop
Speed 98 · 2 points to gain
- −1 Largest Contentful Paint medium effort
Accessibility 90 · 10 points to gain
- −5 `[aria-*]` attributes do not have valid values medium effort
- −5 Buttons do not have an accessible name medium effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| Plasma default demo ↗ | 79 | 100 | 90 | 98 | 100 | 90 | 2026-09-12 |
| home ↗ | 79 | 100 | 90 | 98 | 100 | 90 | 2026-09-12 |
Show this score on your site
A live badge: it always shows Plasma's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/astro/plasma"><img src="https://themestested.com/badge/astro/plasma.svg" alt="Plasma speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.