SEO Audit - RankNibbler

About

Audit the SEO of any web page in one click. RankNibbler SEO Audit runs 83 checks across
10 categories and gives you a weighted A-F score, a category breakdown, and a specific fix
for everything that needs attention.

It is fast and completely private. The whole audit runs locally in your browser: the
extension reads the current page when you click the icon, analyses it on the spot, and
sends nothing anywhere. No sign-up, no API key, no account required to use it.

What it checks:

- Meta: page title, title length, meta description, canonical URL
- Content: word count, text-to-HTML ratio, readability, placeholder text, top keywords
- Headings: single H1, H2 subheadings, heading outline and hierarchy
- Images: missing alt text, width/height, lazy loading, modern formats
- Links: internal vs external, empty links, generic anchor text, social profiles, feeds
- Structured data: JSON-LD validity, schema fields, Open Graph, Twitter Card
- Technical: indexability, HTTPS, viewport, charset, lang, doctype, hreflang, URL structure
- Performance: render-blocking resources, CSS/JS counts, HTML and DOM size, TTFB, page weight
- Accessibility: skip link, semantic landmarks, form input labels
- Tech stack: CMS, framework, analytics, CDN and SEO plugin detection

Click any result to see the detail and a recommended fix, re-scan after a change, or copy
a plain-text report to share.