Archslab
Archslab is a Framer theme by John Nicholson (Free). Tested on 2026-09-29 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 35 for mobile speed and 68 for desktop speed, 69/69 for SEO and 93/93 for accessibility (mobile/desktop, 0–100). Note: its demo home page is heavy — 7.7 MB — heavier than a typical store, so the speed score may understate the theme.
Mobile35

Desktop68

Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 35 | 68 |
| SEO | 69 | 69 |
| Accessibility | 93 | 93 |
| Best practices | 92 | 92 |
Single preset · measured 2 times since 2026-09-29 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Archslab home page
Mobile
Speed 35 · 65 points to gain
- −28.5 Total Blocking Time medium effort
- −25 Largest Contentful Paint medium effort
- −8.2 Speed Index medium effort
- −3 First Contentful Paint medium effort
- 600 ms Reduce unused JavaScript high effort
SEO 69 · 31 points to gain
- −31 Page is blocked from indexing low effort
Accessibility 93 · 7 points to gain
- −4.6 `<html>` element does not have a `[lang]` attribute low effort
- −2 Heading elements are not in a sequentially-descending order medium effort
Best practices 92 · 8 points to gain
- −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 68 · 32 points to gain
- −26.7 Total Blocking Time medium effort
- −5 Speed Index medium effort
SEO 69 · 31 points to gain
- −31 Page is blocked from indexing low effort
Accessibility 93 · 7 points to gain
- −4.6 `<html>` element does not have a `[lang]` attribute low effort
- −2 Heading elements are not in a sequentially-descending order medium effort
Best practices 92 · 8 points to gain
- −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 | ||||||
| Archslab default demo ↗ | 35 | 69 | 93 | 68 | 69 | 93 | 2026-09-29 |
| home ↗ | 35 | 69 | 93 | 68 | 69 | 93 | 2026-09-29 |