Gemma
Gemma is a WordPress theme by Dennis Seid (Free). Tested on 2026-09-13 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 91 for mobile speed and 99 for desktop speed, 54/54 for SEO and 100/96 for accessibility (mobile/desktop, 0–100).
Mobile91
Desktop99
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 91 | 99 |
| SEO | 54 | 54 |
| Accessibility | 100 | 96 |
| Best practices | 73 | 73 |
Single preset · measured 2 times since 2026-09-13 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Gemma home page
Mobile
Speed 91 · 9 points to gain
- −8.8 Largest Contentful Paint medium effort
SEO 54 · 46 points to gain
- −36.6 Page is blocked from indexing low effort
- −9.1 Document does not have a meta description low effort
Best practices 73 · 27 points to gain
- −19.2 Does not use HTTPS outside the theme
- −3.8 Browser errors were logged to the console medium effort
- −3.8 Issues were logged in the `Issues` panel in Chrome Devtools high effort
Desktop
Speed 99 · 1 points to gain
- −0.8 Largest Contentful Paint medium effort
SEO 54 · 46 points to gain
- −36.6 Page is blocked from indexing low effort
- −9.1 Document does not have a meta description low effort
Accessibility 96 · 4 points to gain
- −4.3 Lists do not contain only `<li>` elements and script supporting elements (`<script>` and `<template>`). low effort
Best practices 73 · 27 points to gain
- −19.2 Does not use HTTPS outside the theme
- −3.8 Browser errors were logged to the console medium effort
- −3.8 Issues were logged in the `Issues` panel in Chrome Devtools high effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| Gemma default demo ↗ | 91 | 54 | 100 | 99 | 54 | 96 | 2026-09-13 |
| home ↗ | 91 | 54 | 100 | 99 | 54 | 96 | 2026-09-13 |
Show this score on your site
A live badge: it always shows Gemma's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/wordpress/gemma"><img src="https://themestested.com/badge/wordpress/gemma.svg" alt="Gemma speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.