Twenty Twelve
Twenty Twelve is a WordPress theme by WordPress.org (Free). Tested on 2026-09-12 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 95 for mobile speed and 99 for desktop speed, 54/54 for SEO and 91/91 for accessibility (mobile/desktop, 0–100). On its marketplace it is rated 4.6 out of 5 from 159 reviews.
Mobile95
Desktop99
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 95 | 99 |
| SEO | 54 | 54 |
| Accessibility | 91 | 91 |
| 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 — Twenty Twelve home page
Mobile
Speed 95 · 5 points to gain
- −3 Largest Contentful Paint medium effort
- −1.5 Speed Index 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 91 · 9 points to gain
- −4.4 Form elements do not have associated labels medium effort
- −4.4 Select elements do not have associated label elements. medium effort
Desktop
Speed 99 · 1 points to gain
- −0.6 Speed Index medium effort
- −0.5 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 91 · 9 points to gain
- −4.7 Form elements do not have associated labels medium effort
- −4.7 Select elements do not have associated label elements. medium effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| Twenty Twelve default demo ↗ | 95 | 54 | 91 | 99 | 54 | 91 | 2026-09-12 |
| home ↗ | 95 | 54 | 91 | 99 | 54 | 91 | 2026-09-12 |
Show this score on your site
A live badge: it always shows Twenty Twelve's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/wordpress/twentytwelve"><img src="https://themestested.com/badge/wordpress/twentytwelve.svg" alt="Twenty Twelve speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.