Twenty Seventeen
Twenty Seventeen 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 99 for desktop speed, 58/58 for SEO and 96/96 for accessibility (mobile/desktop, 0–100). On its marketplace it is rated 4.5 out of 5 from 119 reviews.
Mobile96
Desktop99
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 96 | 99 |
| SEO | 58 | 58 |
| Accessibility | 96 | 96 |
| 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 Seventeen home page
Mobile
Speed 96 · 4 points to gain
- −2.4 Speed Index medium effort
- −1.3 Largest Contentful Paint medium effort
- −0.6 First Contentful Paint medium effort
- 150 ms Minify CSS low effort
- 150 ms Reduce unused CSS high effort
SEO 58 · 42 points to gain
- −33.6 Page is blocked from indexing low effort
- −8.3 Document does not have a meta description low effort
Accessibility 96 · 4 points to gain
- −3.6 Links rely on color to be distinguishable. medium effort
Desktop
Speed 99 · 1 points to gain
- −0.8 Speed Index medium effort
SEO 58 · 42 points to gain
- −33.6 Page is blocked from indexing low effort
- −8.3 Document does not have a meta description low effort
Accessibility 96 · 4 points to gain
- −3.6 Links rely on color to be distinguishable. medium effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| Twenty Seventeen default demo ↗ | 96 | 58 | 96 | 99 | 58 | 96 | 2026-09-12 |
| home ↗ | 96 | 58 | 96 | 99 | 58 | 96 | 2026-09-12 |
Show this score on your site
A live badge: it always shows Twenty Seventeen's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/wordpress/twentyseventeen"><img src="https://themestested.com/badge/wordpress/twentyseventeen.svg" alt="Twenty Seventeen speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.