Website SEO Analyzer
Analyze any webpage for SEO readiness. Get a letter grade, 25+ checks across 5 categories, and actionable recommendations — free, no sign-up.
About Website SEO Analyzer
The Website SEO Analyzer checks any public webpage against 25+ SEO best practices and returns a letter grade (A–F) plus detailed results across five categories: On-Page SEO, Content, Technical, Performance Hints, and Social & Indexability. Each failed or warned check includes a specific recommendation so you know exactly what to fix.
Analysis runs entirely in your browser — the page HTML is fetched via a CORS proxy and parsed locally. No data is stored. Works on any public URL.
How to Use
- Paste any public URL into the input bar (e.g.
https://example.com). - Click Analyze — the tool fetches the page and runs all checks.
- Review your letter grade, category grades, and per-check results.
- Fix the items marked ⚠ Warn or ✗ Fail — each shows an actionable tip.
- Click Download Report to save a full HTML report, or Copy Report for plain text.
What Is Checked
On-Page SEO — title tag length, meta description, H1/H2 structure, canonical tag, lang attribute, robots meta, URL length.
Content — word count, image alt text, internal links, keyword consistency between title and H1, canonical signals.
Technical — viewport meta, Open Graph tags, JSON-LD structured data, favicon, HTTPS, page size.
Performance Hints — inline script count, inline style count, render-blocking stylesheet placement.
Social & Indexability — Twitter Card meta, og:image, sitemap reference.
Frequently Asked Questions
Some websites block cross-origin requests or require authentication. The tool uses a public CORS proxy (allorigins.win) to fetch pages — sites that return a 403 or block external requests will show an error. Try another URL or check if the page is publicly accessible.
Each check has a weight based on its SEO impact. A pass earns full points, a warning earns half, and a fail earns zero. The overall score is the weighted sum expressed as 0–100, then mapped to a letter grade (A=90+, B=75–89, C=55–74, D=35–54, F=below 35).
Not directly — real performance metrics require browser rendering. The tool checks HTML-level performance hints like inline script count, inline styles, and raw HTML size, which are indicators but not substitutes for Lighthouse or PageSpeed Insights.
Yes. After analysis, click Download Report to save a self-contained HTML file with all check results and recommendations. Open it in any browser and use Print → Save as PDF to get a PDF version.
No. The URL is sent to a public CORS proxy (allorigins.win) only to fetch the page HTML. No data is stored on any Oneyfy server. The analysis itself runs entirely in your browser.