SEO Inspector

by Alanas Kalinauskas · extendforge.com · Developer Tools

Established publisherManifest V3 Free

View in Chrome Web Store Data as of 16 Oct 2026

Developer-grade technical SEO inspector. Headers, redirects, JSON-LD, DOM diff. Free, no account.

Users

0 in 30 days

Rating

5.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#265K

#221K among extensions

Version

1.0.2

updated 22 May 2026

Users

monthly, 5 months

Latest, 16 Oct 2026: 4 usersMove the mouse over the chart for any month

Ratings count

monthly, 5 months

Latest, 16 Oct 2026: 1 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About SEO Inspector

SEO Inspector reads the page you're on and shows the SEO data developers actually need. Click the icon. See title, meta, canonical, robots, JSON-LD, OG cards, image alts, link inventory, hreflang. Hit Copy and the whole audit goes to your clipboard as JSON. What it shows: - Live SERP preview with pixel-width title and description. - H1-H6 outline. Flags missing or duplicate H1. - Canonical URL. Flags cross-domain canonicals red. - Robots meta. Unmissable noindex badge if set. - Open Graph and Twitter card preview with the image. - Schema.org JSON-LD, pretty-printed and copyable. Almost no other tool does this. - Image alt audit. Counts missing, decorative, and lazy-loaded. - Link inventory with on-page nofollow overlay. Dashed red outline for nofollow, orange for sponsored, blue for UGC. - Mobile viewport check. - Hreflang validation. Flags invalid codes and missing x-default. - Canonical and robots conflict detector. Catches self-canonical with noindex. - Copy the entire audit as JSON. Cmd+Shift+C or the button. Why pick this over the other: - Free. No account. No telemetry. No paywall creep. - No "read your data on all websites" install warning. The popup only reads the tab when you click it. - JSON-LD pretty-print and copy. Hreflang validation. Nofollow overlay. The things paid tools gate. - Copy whole audit as JSON. Pipe it into your own scripts.