Baseline
Baseline is a Shopify theme by Switch ($420). Tested on 2026-11-08 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 88 for mobile speed and 99 for desktop speed, 95/95 for SEO and 95/95 for accessibility (mobile/desktop, 0–100). Those are medians across its 5 tested presets; mobile speed across every tested page ranges from 77 to 100. On its marketplace it is rated 5.0 out of 5 from 95 reviews.
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 88 | 99 |
| SEO | 95 | 95 |
| Accessibility | 95 | 95 |
| Best practices | 99 | 100 |
Median of 5 presets · measured 150 times since 2026-11-06 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Baseline home page
Mobile
Speed 97 · 3 points to gain
- −2.2 Largest Contentful Paint medium effort
- −0.5 Speed Index medium effort
- 150 ms Reduce unused JavaScript high effort
SEO 92 · 8 points to gain
- −7.7 Document does not have a meta description low effort
Accessibility 91 · 9 points to gain
- −5.2 Buttons do not have an accessible name medium effort
- −3.6 Elements use prohibited ARIA attributes medium effort
Desktop
SEO 92 · 8 points to gain
- −7.7 Document does not have a meta description low effort
Accessibility 91 · 9 points to gain
- −5.2 Buttons do not have an accessible name medium effort
- −3.6 Elements use prohibited ARIA attributes medium effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| Austere demo ↗ | 88 | 95 | 95 | 99 | 95 | 95 | 2026-11-07 |
| category ↗ | 78 | 92 | 100 | 98 | 92 | 100 | 2026-11-08 |
| home ↗ | 99 | 92 | 89 | 100 | 92 | 89 | 2026-11-07 |
| product ↗ | 86 | 100 | 97 | 99 | 100 | 96 | 2026-11-08 |
| Baseline default demo ↗ | 91 | 95 | 96 | 99 | 95 | 96 | 2026-11-06 |
| category ↗ | 86 | 92 | 100 | 100 | 92 | 100 | 2026-11-08 |
| home ↗ | 97 | 92 | 91 | 100 | 92 | 91 | 2026-11-06 |
| product ↗ | 89 | 100 | 97 | 98 | 100 | 96 | 2026-11-08 |
| Brutalist demo ↗ | 88 | 90 | 96 | 99 | 90 | 96 | 2026-11-07 |
| category ↗ | 78 | 92 | 100 | 99 | 92 | 100 | 2026-11-08 |
| home ↗ | 100 | 77 | 91 | 100 | 77 | 91 | 2026-11-07 |
| product ↗ | 85 | 100 | 97 | 99 | 100 | 96 | 2026-11-08 |
| Courier demo ↗ | 80 | 95 | 95 | 98 | 95 | 95 | 2026-11-07 |
| category ↗ | 78 | 92 | 100 | 99 | 92 | 100 | 2026-11-08 |
| home ↗ | 77 | 92 | 88 | 95 | 92 | 88 | 2026-11-07 |
| product ↗ | 86 | 100 | 97 | 99 | 100 | 96 | 2026-11-08 |
| Press demo ↗ | 87 | 95 | 94 | 99 | 95 | 93 | 2026-11-07 |
| category ↗ | 78 | 92 | 100 | 99 | 92 | 100 | 2026-11-08 |
| home ↗ | 98 | 92 | 84 | 99 | 92 | 84 | 2026-11-07 |
| product ↗ | 86 | 100 | 97 | 99 | 100 | 96 | 2026-11-08 |
Show this score on your site
A live badge: it always shows Baseline's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/shopify/baseline"><img src="https://themestested.com/badge/shopify/baseline.svg" alt="Baseline speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.