Flat Blocks Classic
Flat Blocks Classic is a WordPress theme by Tim Nicholson (Free). Tested on 2026-09-13 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 95 for mobile speed and 100 for desktop speed, 54/54 for SEO and 96/93 for accessibility (mobile/desktop, 0–100).
Mobile95
Desktop100
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 95 | 100 |
| SEO | 54 | 54 |
| Accessibility | 96 | 93 |
| Best practices | 100 | 100 |
Single preset · measured 2 times since 2026-09-13 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Flat Blocks Classic home page
Mobile
Speed 95 · 5 points to gain
- −3.8 Largest Contentful Paint medium effort
- −0.8 First Contentful Paint medium effort
SEO 54 · 46 points to gain
- −36.6 Page is blocked from indexing low effort
- −9.1 Document does not have a meta description low effort
Accessibility 96 · 4 points to gain
- −3.7 Background and foreground colors do not have a sufficient contrast ratio. medium effort
Desktop
SEO 54 · 46 points to gain
- −36.6 Page is blocked from indexing low effort
- −9.1 Document does not have a meta description low effort
Accessibility 93 · 7 points to gain
- −3.6 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −3.6 Lists do not contain only `<li>` elements and script supporting elements (`<script>` and `<template>`). low effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| Flat Blocks Classic default demo ↗ | 95 | 54 | 96 | 100 | 54 | 93 | 2026-09-13 |
| home ↗ | 95 | 54 | 96 | 100 | 54 | 93 | 2026-09-13 |
Show this score on your site
A live badge: it always shows Flat Blocks Classic's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/wordpress/flat-blocks-classic"><img src="https://themestested.com/badge/wordpress/flat-blocks-classic.svg" alt="Flat Blocks Classic speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.