RANKNIBBLER

Free Website Tester

RankNibbler is a free website testing tool that checks any webpage for SEO issues, performance problems, accessibility gaps, and technical errors. Enter any URL and get a detailed report with a score out of 100, specific recommendations, and actionable fixes — all in seconds, with no signup required.

What Does the Website Test Check?

RankNibbler tests over 30 aspects of your website across six categories. Every test runs automatically when you enter a URL.

SEO Test

The core of the website test checks how well your page is optimised for search engines:

• Title tag — is it present and the right length (30-60 characters)?
• Meta description — is it present and between 120-160 characters?
• Heading structure — does the page have exactly one H1 with proper H2-H6 hierarchy?
• Canonical URL — is a canonical tag set to prevent duplicate content?
• Robots directives — is the page accidentally blocked from indexing?
• Structured data — does the page have JSON-LD schema markup for rich results?
• Open Graph tags — will the page look good when shared on social media?

Content Test

Analyses the quality and structure of your page content:

• Keyword density — what are the most frequently used words and phrases?
• Readability score — is the content easy to read for your target audience?
• Word count — is there enough content or is the page too thin?
• Text-to-HTML ratio — is the page mostly content or mostly code?

Image Test

Checks every image on the page:

• Alt text — do all images have descriptive alt attributes?
• Lazy loading — are below-fold images using loading="lazy"?
• Dimensions — do images have width and height to prevent layout shift?

Link Test

Analyses all links on the page:

• Internal and external links — how many links and where do they go?
• Empty links — are there links with no text or aria-label?
• Nofollow ratio — what percentage of links are nofollow?

Technical Test

Checks the technical health of the page:

• HTTPS — is the connection secure?
• Viewport meta tag — is the page mobile-friendly?
• HTML lang attribute — is the page language declared?
• Doctype and charset — is the page using HTML5 and UTF-8?
• Deprecated HTML — are there outdated tags still in use?
• Script loading — do scripts use async or defer?
• CSS/JS file count — how many external resources are loaded?

Performance Test

After the SEO test completes, a performance test runs automatically using Google's PageSpeed Insights API:

• Performance score — Google Lighthouse performance rating (0-100)
• Largest Contentful Paint (LCP) — how fast the main content loads
• Cumulative Layout Shift (CLS) — how stable the layout is during loading
• Total Blocking Time — how long scripts block the page
• Specific recommendations — what to fix to improve speed

How the Website Test Works

1. Enter any URL on the RankNibbler homepage and click Analyse
2. RankNibbler fetches the page from our server, the same way a search engine bot would
3. 30+ checks run instantly in your browser — no data is stored on our servers
4. Get your score out of 100 with a detailed breakdown across multiple tabs
5. Performance test runs in background using Google PageSpeed Insights API
6. Download a PDF report or export results as CSV to share with your team

Website Test Score Explained

Score	Rating	What It Means
80 - 100	Good	Your website passes most tests. Minor improvements possible but fundamentals are solid.
50 - 79	Needs Work	Several issues found. Review the recommendations to improve your site.
0 - 49	Poor	Significant problems that are likely hurting your search visibility.

Why Test Your Website?

Regular website testing catches issues before they affect your search rankings. Common problems found during website tests include:

• Missing or duplicate title tags and meta descriptions
• Images without alt text (hurts accessibility and image search)
• No structured data (missing out on rich results in Google)
• Render-blocking scripts slowing down page load
• Missing canonical URLs causing duplicate content
• Poor heading structure confusing search engines

These issues are invisible to visitors but directly affect how search engines index and rank your pages. A regular website test helps you catch and fix them before they cost you traffic.

Test Multiple Pages

Need to test more than one page? RankNibbler offers several ways to test at scale:

• Site Audit — enter your domain and test up to 200 pages automatically by crawling your sitemap
• Bulk Checker — paste up to 20 URLs and test them all at once
• SEO Compare — compare two pages side by side to see which scores better
• Broken Link Checker — test all links on a page for 404 errors

Website Test vs Competitors

Most website testing tools require signup, limit free usage, or charge monthly fees. RankNibbler is completely free with no limits, no accounts, and no premium tier. Your page data is never stored — the test runs in your browser and results stay in your session.

Other Free Tools

Beyond the website tester, RankNibbler offers a full suite of free SEO tools including a keyword rank checker, schema markup generator, SERP snippet generator, redirect checker, and more — all free, no signup required.

Last updated: March 2026