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Check any website’s SEO, speed, DNS, SSL, redirects and sitemaps — live, in seconds. Every tool says exactly where its data comes from and what it can’t see.

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Popular tools

SEO Checker Audit any page: tags, speed basics, content and AI readiness. Website Speed Test Lighthouse performance score, Core Web Vitals lab metrics and fixes. WHOIS Lookup Registrar, dates, status codes and nameservers for any domain. DNS Lookup A, AAAA, CNAME, MX, NS, TXT, SOA and CAA records, plus SPF and DMARC. SSL Checker Certificate trust, expiry, hostname coverage, chain and TLS version. Domain Authority Checker NewBacklink Domain Score from the Common Crawl web graph — up to 20 at once. Redirect Checker Follow every hop: status codes, chains, loops and HTTPS. Broken Link Checker Crawl up to 100 pages and find every link that is broken.

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SEO Tools

Audit a page, its meta tags and its structured data.

Technical SEO Tools

Robots.txt, sitemaps, redirects and broken links.

Domain Tools

WHOIS, domain age, DNS records, SSL and authority.

Website Tools

Speed tests and the technology behind a site.

AI SEO & AI Visibility Tools

Whether AI engines can read you, and whether they name you.

Backlink Tools

Find real guest post opportunities, checked live.

Keyword Tools

See which words and phrases a page actually repeats.

AI Visibility Index

Does AI recommend your brand?

Every day we ask AI models real software-buying questions and archive which brands they name — 1,815 answers so far. The archive can’t be recreated after the fact, so it grows more valuable every day.

Most recommended right now: HubSpot, Microsoft Clarity, Hotjar, Typeform, Intercom · full leaderboard

Latest guides

What Is llms.txt? Format, Status and When to Use ItWhat llms.txt is: the llmstxt.org proposal, its Markdown format, llms-full.txt, its honest status with Google and AI tools, and how to create a useful one.5 min read What Is Crawl Budget and How to Optimize ItWhat crawl budget is, when it actually matters, and a practical checklist to stop search engines wasting it on redirects, errors and low-value URLs.4 min read What Is a Backlink? A Plain-English GuideWhat a backlink is, how dofollow, nofollow, sponsored and ugc links differ, what Google treats as link spam, and how to earn backlinks that last.7 min read SSL Certificate Errors: How to Diagnose and Fix ThemFix SSL certificate errors step by step: expired, self-signed, name mismatch, missing intermediate, untrusted CA, mixed content and HSTS, plus auto-renewal.7 min read SEO Audit Checklist: A Practical Step-by-Step GuideA practical SEO audit checklist: crawlability, indexability, on-page tags, technical health, Core Web Vitals, structured data, internal links and AI readiness.6 min read Schema Markup Guide: JSON-LD, Types and TestingA practical schema markup guide: JSON-LD vs Microdata vs RDFa, common types, required properties, @graph, testing tools, Google's guidelines and FAQ changes.6 min read

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Why NewBacklink

Free, no signup

No accounts, no trial, no “upgrade to see results”. Every tool is complete and free.

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Each tool explains its source and limits. When we can’t know something, we say so instead of guessing.

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