Dellen
Dellen is a Framer theme by Sidebay Supply ($79). Tested on 2026-10-13 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 85 for mobile speed and 99 for desktop speed, 100/100 for SEO and 100/100 for accessibility (mobile/desktop, 0–100). Note: its demo home page is heavy — 11.6 MB — heavier than a typical store, so the speed score may understate the theme.
Mobile85

Desktop99

Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 85 | 99 |
| SEO | 100 | 100 |
| Accessibility | 100 | 100 |
| Best practices | 100 | 100 |
Single preset · measured 4 times since 2026-09-12 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Dellen home page
Mobile
Speed 85 · 15 points to gain
- −13.3 Largest Contentful Paint medium effort
- −1.1 First Contentful Paint medium effort
- 450 ms Reduce unused JavaScript high effort
Desktop
Speed 99 · 1 points to gain
- −1 Largest Contentful Paint medium effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| Dellen default demo ↗ | 85 | 100 | 100 | 99 | 100 | 100 | 2026-10-13 |
| home ↗ | 85 | 100 | 100 | 99 | 100 | 100 | 2026-10-13 |