grader.com
Link authority for grader.com (registrable domain: grader.com) from the Common Crawl web graph: PageRank and harmonic centrality history since 2017, current scores, and the site's top backlink sources.
Web-graph authority (0-100)
Domain scores measure grader.com as a whole: every subdomain's links rolled up into one node of Common Crawl's domain-level web graph. Host scores measure the exact hostname grader.com. WWW scores cover the www variant of that hostname, which the graph tracks as its own entry since January 2026 (before that, www and bare host were merged). A big gap between domain and host usually means the domain's authority lives on other subdomains. PageRank is link-endorsement authority: how much weight the sites linking here carry themselves. Harmonic centrality measures reach: how close this site sits to the rest of the web when following links, which favors broadly connected sites over ones boosted by a few heavy linkers. All are normalized 0 to 100 within each crawl snapshot; a dash means that series does not exist for this site.
Homepage
What grader.com presents on its own homepage: the page title, description, and the social share markup it publishes. Pulled from https://grader.com.
| Title | Website Grader - Check your Pages for Speed and SEO |
|---|---|
| Description | Website Grader is a free online tool that grades your site against key metrics like performance, mobile readiness, SEO, and security. Test your URLs now! |
| OG Title | Website Grader - Check your Pages for Speed and SEO |
| OG Description | Website Grader is a free online tool that grades your site against key metrics like performance, mobile readiness, SEO, and security. Test your URLs now! |
| Twitter Title | Website Grader - Check your Pages for Speed and SEO |
| Twitter Card | summary |
Structured data (JSON-LD)
The schema.org markup this homepage publishes: the machine-readable identity search engines and AI systems read. Types found: FAQPage.
JSON-LD block (2,718 bytes)
{
"@context": "https://schema.org/",
"@type": "FAQPage",
"mainEntity": [
{
"@type": "Question",
"name": "What is a website checker?",
"acceptedAnswer": {
"@type": "Answer",
"text": "A website checker is a mini site audit, giving you insight into how your website performs. A good website analyzer should audit your site across a range of criteria so you can get an idea of your overall performance, security, mobile experience, and search engine optimization (SEO). If you’re looking for next steps, read HubSpot’s Academy Course on Web Optimization to learn about the factors that are both improving and reducing your site rating."
}
},
{
"@type": "Question",
"name": "Why is website performance important?",
"acceptedAnswer": {
"@type": "Answer",
"text": "Performance matters because it is a key factor in user experience. When users get an immediate response, such as a click, a successful login, or confirmation, they are more likely to stay on the page. This fast response is commonly referred to as website speed. Search engines like Google check website speed and interactivity to make sure searchers only see high-quality sites. So beyond building a better user experience, speed tools help you make your site more attractive to search engines – win-win."
}
},
{
"@type": "Question",
"name": "How to optimize a website for SEO?",
"acceptedAnswer": {
"@type": "Answer",
"text": "There are some concrete steps you can take to optimize your site for SEO. Making sure your pages are indexed (viewable by search engines) is a great start. In addition, making full use of alt-tags and meta-data is advised. If you want to go further, try making sure you have descriptive link text and appropriate content plugins. And if you’re wondering where to start, getting your site's SEO score is a great first step. It just so happens HubSpot's website grader has a built-in SEO test!"
}
},
{
"@type": "Question",
"name": "Why is Website grading important?",
"acceptedAnswer": {
"@type": "Answer",
"text": "Test grading is important because it can help you build your site smarter and better while monitoring its health along the way. These site testers help show the impact of the steps you’re taking and areas for new opportunities by checking the pages of your website. It can also help you understand what your competitors are doing, and why they do it. Technical evaluation and general assessment are important in any site build. Doing both makes your site successful in the search results and beyond!"
}
}
]
}Authority over time
Every Common Crawl web-graph release since 2017, roughly quarterly. The domain series goes back to 2017; Common Crawl only began publishing the host-level graph in 2020, so host lines start there. Click a legend entry to show or hide that line. Flat lines are normal for established sites; watch for sustained rises or drops, which track real gains or losses in who links here.
A note on www: through the end of 2025 the source web graph merged www and non-www hostnames into the bare name, so one host line covers both. Starting in January 2026 the graph splits them into separate entries, which is why www can carry its own scores going forward.
Backlink counts
Unique linking domains seen in Common Crawl's link graphs. This is a different dataset than the 0-100 authority scores above: these are raw counts, host-level for grader.com and domain-level for grader.com with all its subdomains combined. Common Crawl covers a large sample of the web, not all of it, so treat counts as comparable between sites rather than absolute totals.
Top backlinks in the domain graph
Common Crawl publishes two link graphs. The DOMAIN graph connects whole domains: every link from any page of one domain to any page of another. This table shows the highest-authority domains linking to grader.com (including its subdomains), ranked by the linker's PageRank. The table shows the top 1,000; the download carries the full stored list (up to 10,000 linkers) as JSON. Click a linker for its own site profile.
Top backlinks in the host graph
The HOST graph connects exact hostnames, so subdomains count separately. This table shows the highest-authority hosts linking to grader.com specifically, ranked by the linker's PageRank. The table shows the top 60; the download carries the full stored list (up to 10,000 linkers) as JSON. Click a linker for its own site profile.