Twenty Fifteen
Twenty Fifteen 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 96 for mobile speed and 100 for desktop speed, 54/54 for SEO and 87/90 for accessibility (mobile/desktop, 0–100). On its marketplace it is rated 4.4 out of 5 from 54 reviews.
Mobile96
Desktop100
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 96 | 100 |
| SEO | 54 | 54 |
| Accessibility | 87 | 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 — Twenty Fifteen home page
Mobile
Speed 96 · 4 points to gain
- −3.3 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 87 · 13 points to gain
- −4.8 Form elements do not have associated labels medium effort
- −4.8 Select elements do not have associated label elements. medium effort
- −3.4 Touch targets do not have sufficient size or spacing. medium effort
Desktop
Speed 100 · 0 points to gain
- −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 90 · 10 points to gain
- −5.1 Form elements do not have associated labels medium effort
- −5.1 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 Fifteen default demo ↗ | 96 | 54 | 87 | 100 | 54 | 90 | 2026-09-12 |
| home ↗ | 96 | 54 | 87 | 100 | 54 | 90 | 2026-09-12 |
Show this score on your site
A live badge: it always shows Twenty Fifteen's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/wordpress/twentyfifteen"><img src="https://themestested.com/badge/wordpress/twentyfifteen.svg" alt="Twenty Fifteen speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.