BroadcastChannel
BroadcastChannel is a Astro theme by Kai (Free). Tested on 2026-09-13 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 98 for mobile speed and 100 for desktop speed, 92/92 for SEO and 100/100 for accessibility (mobile/desktop, 0–100). Note: its demo home page is heavy — 15.3 MB — heavier than a typical store, so the speed score may understate the theme.
Mobile98
Desktop100
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 98 | 100 |
| SEO | 92 | 92 |
| Accessibility | 100 | 100 |
| 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 — BroadcastChannel home page
Mobile
Speed 98 · 2 points to gain
- −1.3 Largest Contentful Paint medium effort
- −0.5 Speed Index medium effort
SEO 92 · 8 points to gain
- −7.7 robots.txt is not valid outside the theme
Desktop
SEO 92 · 8 points to gain
- −7.7 robots.txt is not valid outside the theme
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| BroadcastChannel default demo ↗ | 98 | 92 | 100 | 100 | 92 | 100 | 2026-09-13 |
| home ↗ | 98 | 92 | 100 | 100 | 92 | 100 | 2026-09-13 |
Show this score on your site
A live badge: it always shows BroadcastChannel's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/astro/broadcastchannel"><img src="https://themestested.com/badge/astro/broadcastchannel.svg" alt="BroadcastChannel speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.