Alchemy
Alchemy is a Shopify theme by Clean Canvas ($420). Tested on 2026-11-08 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 76 for mobile speed and 95 for desktop speed, 59/59 for SEO and 92/90 for accessibility (mobile/desktop, 0–100). Those are medians across its 3 tested presets; mobile speed across every tested page ranges from 44 to 83. On its marketplace it is rated 4.9 out of 5 from 58 reviews. Note: its demo home page is heavy — 12.4 MB — heavier than a typical store, so the speed score may understate the theme.
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 76 | 95 |
| SEO | 59 | 59 |
| Accessibility | 92 | 90 |
| Best practices | 96 | 96 |
Median of 3 presets · measured 90 times since 2026-10-09 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Alchemy home page
Mobile
Speed 75 · 25 points to gain
- −16.3 Largest Contentful Paint medium effort
- −8.8 Cumulative Layout Shift medium effort
SEO 54 · 46 points to gain
- −31 Page is blocked from indexing low effort
- −7.7 Links do not have descriptive text low effort
- −7.7 Image elements do not have `[alt]` attributes low effort
Accessibility 89 · 11 points to gain
- −4.6 Image elements do not have `[alt]` attributes low effort
- −3.2 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −3.2 Links do not have a discernible name medium effort
Best practices 96 · 4 points to gain
- −3.8 Browser errors were logged to the console medium effort
Desktop
Speed 90 · 10 points to gain
- −7.8 Cumulative Layout Shift medium effort
- −1.3 Largest Contentful Paint medium effort
- −0.9 Speed Index medium effort
SEO 54 · 46 points to gain
- −31 Page is blocked from indexing low effort
- −7.7 Links do not have descriptive text low effort
- −7.7 Image elements do not have `[alt]` attributes low effort
Accessibility 89 · 11 points to gain
- −4.8 Image elements do not have `[alt]` attributes low effort
- −3.3 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −3.3 Links do not have a discernible name medium effort
Best practices 96 · 4 points to gain
- −3.8 Browser errors were logged to the console medium effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| Alchemy default demo ↗ | 77 | 56 | 91 | 95 | 56 | 90 | 2026-11-07 |
| category ↗ | 75 | 61 | 93 | 97 | 61 | 94 | 2026-11-08 |
| home ↗ | 75 | 54 | 89 | 90 | 54 | 89 | 2026-11-07 |
| product ↗ | 82 | 54 | 91 | 98 | 54 | 88 | 2026-11-08 |
| Splice demo ↗ | 76 | 59 | 92 | 96 | 59 | 90 | 2026-11-07 |
| category ↗ | 79 | 61 | 94 | 95 | 61 | 94 | 2026-11-07 |
| home ↗ | 67 | 61 | 92 | 97 | 61 | 89 | 2026-11-07 |
| product ↗ | 81 | 54 | 91 | 97 | 54 | 88 | 2026-11-07 |
| Weave demo ↗ | 67 | 59 | 92 | 93 | 59 | 91 | 2026-11-07 |
| category ↗ | 75 | 61 | 93 | 95 | 61 | 94 | 2026-11-07 |
| home ↗ | 44 | 61 | 92 | 85 | 61 | 92 | 2026-11-07 |
| product ↗ | 83 | 54 | 91 | 99 | 54 | 88 | 2026-11-07 |
Show this score on your site
A live badge: it always shows Alchemy's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/shopify/alchemy"><img src="https://themestested.com/badge/shopify/alchemy.svg" alt="Alchemy speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.