Conceptualize
Conceptualize is a Webflow theme by Templates ($79). Tested on 2026-09-28 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 59 for mobile speed and 87 for desktop speed, 91/91 for SEO and 94/94 for accessibility (mobile/desktop, 0–100). Note: its demo home page is heavy — 6.8 MB — heavier than a typical store, so the speed score may understate the theme.
Mobile59
Desktop87
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 59 | 87 |
| SEO | 91 | 91 |
| Accessibility | 94 | 94 |
| Best practices | 96 | 96 |
Single preset · measured 2 times since 2026-09-28 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Conceptualize home page
Mobile
Speed 59 · 41 points to gain
- −19 Largest Contentful Paint medium effort
- −10.3 Cumulative Layout Shift medium effort
- −7 First Contentful Paint medium effort
- −4.3 Speed Index medium effort
- 250 ms Reduce unused JavaScript high effort
SEO 91 · 9 points to gain
- −9.1 Document does not have a meta description low effort
Accessibility 94 · 6 points to gain
- −3.5 Links do not have a discernible name medium effort
- −1.5 Heading elements are not in a sequentially-descending order medium effort
- −1.5 Document does not have a main landmark. medium effort
Best practices 96 · 4 points to gain
- −3.8 Browser errors were logged to the console medium effort
Desktop
Speed 87 · 13 points to gain
- −4.7 Cumulative Layout Shift medium effort
- −4.3 Speed Index medium effort
- −2.2 Largest Contentful Paint medium effort
- −1.2 Total Blocking Time medium effort
SEO 91 · 9 points to gain
- −9.1 Document does not have a meta description low effort
Accessibility 94 · 6 points to gain
- −3.5 Links do not have a discernible name medium effort
- −1.5 Heading elements are not in a sequentially-descending order medium effort
- −1.5 Document does not have a main landmark. 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 | ||||||
| Conceptualize default demo ↗ | 59 | 91 | 94 | 87 | 91 | 94 | 2026-09-28 |
| home ↗ | 59 | 91 | 94 | 87 | 91 | 94 | 2026-09-28 |
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<a href="https://themestested.com/theme/webflow/conceptualize-portfolio-website-template"><img src="https://themestested.com/badge/webflow/conceptualize-portfolio-website-template.svg" alt="Conceptualize speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.