Burin
Burin is a Framer theme by John Nicholson (Free). Tested on 2026-10-06 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 25 for mobile speed and 39 for desktop speed, 69/69 for SEO and 90/89 for accessibility (mobile/desktop, 0–100). Note: its demo home page is heavy — 20.1 MB — heavier than a typical store, so the speed score may understate the theme.
Mobile25

Desktop39

Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 25 | 39 |
| SEO | 69 | 69 |
| Accessibility | 90 | 89 |
| Best practices | 88 | 88 |
Single preset · measured 2 times since 2026-10-06 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Burin home page
Mobile
Speed 25 · 75 points to gain
- −25 Largest Contentful Paint medium effort
- −18 Total Blocking Time medium effort
- −12.3 Cumulative Layout Shift medium effort
- −10 Speed Index medium effort
- −9.7 First Contentful Paint medium effort
- 450 ms Reduce unused JavaScript high effort
SEO 69 · 31 points to gain
- −31 Page is blocked from indexing low effort
Accessibility 90 · 10 points to gain
- −4.2 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −4.2 `<html>` element does not have a `[lang]` attribute low effort
- −1.8 Document does not have a main landmark. medium effort
Best practices 88 · 12 points to gain
- −3.8 Displays images with incorrect aspect ratio low effort
- −3.8 Browser errors were logged to the console medium effort
- −3.8 Issues were logged in the `Issues` panel in Chrome Devtools high effort
Desktop
Speed 39 · 61 points to gain
- −25.2 Total Blocking Time medium effort
- −24.8 Largest Contentful Paint medium effort
- −9.9 Speed Index medium effort
- −0.8 First Contentful Paint medium effort
- −0.5 Cumulative Layout Shift medium effort
SEO 69 · 31 points to gain
- −31 Page is blocked from indexing low effort
Accessibility 89 · 11 points to gain
- −4.3 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −4.3 `<html>` element does not have a `[lang]` attribute low effort
- −1.9 Document does not have a main landmark. medium effort
Best practices 88 · 12 points to gain
- −3.8 Displays images with incorrect aspect ratio low effort
- −3.8 Browser errors were logged to the console medium effort
- −3.8 Issues were logged in the `Issues` panel in Chrome Devtools high effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| Burin default demo ↗ | 25 | 69 | 90 | 39 | 69 | 89 | 2026-10-06 |
| home ↗ | 25 | 69 | 90 | 39 | 69 | 89 | 2026-10-06 |