Astro themes ranked by mobile SEO

As of September 2026 (measured 2026-09-15), the most SEO-friendly Astro theme on mobile is 8-BitQuest by AstroCraftThemes, with a Google Lighthouse SEO score of 100 out of 100, followed by A Quiet Publication by Liyuk at 100 and Agency10 at 100. 1,007 Astro themes were tested on their own demo stores; the ranking above is live and changes as themes are re-tested.

On desktop, 8-BitQuest by AstroCraftThemes has the highest SEO score in September 2026 at 100 out of 100, then A Quiet Publication at 100. Desktop scores run higher than mobile for the same theme because Lighthouse's mobile test simulates a mid-range phone on a slow 4G connection; mobile is the score Google ranks by.

Among free Astro themes, 8-BitQuest by AstroCraftThemes has the highest mobile SEO score in September 2026 at 100 out of 100; A Quiet Publication is next at 100. 438 of the 1,007 tested Astro themes are free; the full list is at /astro/free.

In September 2026, the median mobile Lighthouse SEO score across 1,007 tested Astro themes is 100 out of 100, and 775 (77%) reach Google's "good" band of 90 or better. Google's bands are 90–100 good, 50–89 needs improvement and 0–49 poor.

775 Astro themes score 90 or better for mobile SEO in September 2026, led by 8-BitQuest (100), A Quiet Publication (100), Agency10 (100), AI Chat Bot (100), AIAgency (100), Maria (100), Alexander’s astro tailwind daisyui starter (100) and Almanac (100). Scores are medians across each theme's tested presets.

8-BitQuest by AstroCraftThemes scores 100 out of 100 for mobile SEO and 100 on desktop in September 2026, measured with Google Lighthouse on its demo store. That places it first of 1,007 tested Astro themes. Its page at /theme/astro/8-bitquest shows every page, preset and the audits behind the number.

In September 2026, 8-BitQuest scores 100 and A Quiet Publication scores 100 for mobile SEO; on desktop it is 100 against 100. Two points is inside Lighthouse's run-to-run variation, so treat them as level on this measure. Pick both in the rankings and press Compare for every score side by side.

Among vendors with two or more tested Astro themes, Themefisher has the highest median mobile SEO score in September 2026: 100 across 48 themes. Vendor pages list every theme a vendor has on the rankings.

1,007 Astro themes have Lighthouse scores as of 2026-09-15. Every theme is re-tested on a schedule set by its popularity — the most used every week, the long tail every one to two months — and every run is kept, so a theme's page shows its history. New themes are picked up from the marketplaces daily.

Lighthouse's SEO score checks the technical basics a theme controls — crawlable links, meta tags, mobile viewport, legible fonts, valid structured markup — and most Astro themes pass most of them, which is why SEO scores cluster high. Speed separates them: Google ranks on Core Web Vitals, so the best theme for rankings is one with a high SEO score and a high mobile speed score. 8-BitQuest leads on SEO in September 2026; the speed ranking is one click away.

Each theme's own demo store is run through Google's PageSpeed Insights API (Lighthouse) on a simulated mobile phone and on desktop, for the home page and, on store platforms, a collection page and a product page. A theme's score is the median of its presets; a preset's is the mean of its pages. Dead, password-protected and cloaked demos are excluded before they can score. The full method is at /methodology.