Synth
Synth is a Astro theme by Andrei Alba (Paid). Tested on 2026-10-09 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores – for mobile speed and 100 for desktop speed, 100/100 for SEO and 97/97 for accessibility (mobile/desktop, 0–100). Note: its demo home page is light — 250 KB in 7 requests — where a stocked storefront is usually 1–4 MB, so the speed score flatters it.
Mobile
Desktop100
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | – | 100 |
| SEO | 100 | 100 |
| Accessibility | 97 | 97 |
| Best practices | 100 | 100 |
Single preset · measured 2 times since 2026-10-09 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Synth home page
Mobile
Accessibility 97 · 3 points to gain
- −3.1 Background and foreground colors do not have a sufficient contrast ratio. medium effort
Desktop
Accessibility 97 · 3 points to gain
- −3.1 Background and foreground colors do not have a sufficient contrast ratio. medium effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| Synth default demo ↗ | – | 100 | 97 | 100 | 100 | 97 | 2026-10-09 |
| home ↗ | – | 100 | 97 | 100 | 100 | 97 | 2026-10-09 |
Show this score on your site
A live badge: it always shows Synth's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/astro/synth"><img src="https://themestested.com/badge/astro/synth.svg" alt="Synth speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.