The Only One SEO Extension You Need

Full SEO audit in one click — meta tags, Open Graph, Core Web Vitals, structured data, hreflang, images, links, and accessibility.

As of June 2026, The Only One SEO Extension You Need has 4 users and a 5.00/5 rating from 2 reviews in the Developer Tools category.

Developer Tools

Chrome Web Store ↗.crx

Users−20.0%

Rating0%

5.00

2 reviews

Reviews+100.0%

Version

0.1.0

Manifest V3

History

5 snapshots

Tracking since Apr 17, 2026.

View as table

Date	Users	Rating	Reviews	Version
Apr 17, 2026	5	5.00	1	0.1.0
May 8, 2026	6	5.00	2	0.1.0
May 19, 2026	4	5.00	2	0.1.0
Jun 1, 2026	6	5.00	2	0.1.0
Jun 7, 2026	5	5.00	2	0.1.0
Now	4	5.00	2	0.1.0

Permissions & access

Permissions: activeTabscripting
Host access: <all_urls>

Screenshots

The Only One SEO Extension You Need screenshot 1

The Only One SEO Extension You Need screenshot 2

About

This SEO extension gives you an instant, comprehensive SEO audit for any page you're visiting — no account required, no data sent to any server.

Open the extension on any webpage and get a scored report across 8 categories:

📋 OVERVIEW
A 0–100 SEO score with prioritised issues sorted by impact. See what's critical, what's a warning, and what's passing at a glance.

🏷️ META TAGS
Title tag and meta description validation with length meters, plus robots, viewport, charset, refresh, author, and keywords tags.

📱 SOCIAL PREVIEWS
Full Open Graph and Twitter Card audit with image previews. Favicon, Apple Touch Icon, and theme colour checks.

✍️ CONTENT
Word count, reading level (Flesch-Kincaid), H1 presence and uniqueness, heading hierarchy validation, visual heading tree, and top keyword frequency analysis.

⚙️ TECHNICAL
URL depth, HTTPS, canonical tag, robots.txt and sitemap.xml availability, noindex/nofollow detection, mixed content, pagination links, HTML lang, and hreflang back-reference validation.

⚡ PERFORMANCE
Core Web Vitals — LCP, CLS, INP — plus FCP, TTFB, DOM size, and render-blocking resources.

🔗 LINKS & IMAGES
Internal/external/nofollow link counts, target=_blank security violations, image alt text coverage, lazy loading, srcset usage, and missing dimensions.

🧩 STRUCTURED DATA
JSON-LD block viewer with syntax highlighting and type detection, plus Microdata and RDFa detection. One-click links to Google Rich Results Test and Schema.org Validator.