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Free SEO & webmaster tools

Everything SEOs and web developers check every day — DNS, email, SSL, redirects, crawling, schema, backlinks and keywords. Every number explained.

49 free toolsFree plan foreverNo credit card

Backlinks & authority

Free Backlink CheckerSee who links to any website — referring domains, anchors and link quality, explained in plain words.Website Authority CheckerA 0–100 score of how strong a site's backlink profile is — compared against millions of real websites.

Keyword research

Free Keyword GeneratorTurn one seed word into hundreds of keyword ideas — with search volume and difficulty — for any country.Keyword Difficulty CheckerHow hard is it to reach Google's page 1? A 0–100 score with the reason and the links you'd need.Keyword Search Volume CheckerHow many people search for a keyword each month — with the 12-month trend, CPC and difficulty.Free SERP CheckerSee Google's top results for any keyword and country — with the authority, links and traffic behind each page.

Traffic & rankings

Website Traffic CheckerEstimate how many visitors any website gets from Google — and which keywords bring them.Keyword Rank CheckerWhere does your site rank on Google for a keyword? Your position, ranking page and who's ahead.AI Visibility CheckerDo AI assistants mention your brand when people ask about your topic? See who gets recommended — and who gets cited.

On-page & technical SEO

Website Speed TestHow fast does your page load on mobile and desktop? Score, Core Web Vitals and what to fix — in plain words.Free SEO CheckerA 0–100 on-page SEO score for any URL — 20+ checks, each with a clear fix.Meta Tag CheckerSee exactly how Google and social networks show your page — and fix titles and descriptions that get cut off.Hreflang Tags CheckerValidate a page's hreflang set — codes, x-default, self-reference — and confirm every alternate links back.Canonical Tag CheckerWhich URL does this page tell Google to index? Check the canonical tag, conflicts and the target's status.Google SERP Preview ToolType a title and description — or paste a URL — and see your Google result on desktop and mobile, with pixel-accurate cut-off.H1 & Heading Structure CheckerSee a page's H1–H6 outline as a tree and catch missing H1s, skipped levels and empty headings.Web Page Size CheckerHow many KB does a page weigh, and what makes it heavy? HTML, CSS, JS, images and fonts — with the biggest files.

Crawling & indexing

Broken Link CheckerTest every link on a page and find the dead ones — 404s, errors and redirect chains.Redirect CheckerFollow every hop from a URL to its final page — status codes, timing, loops — and test the http/https and www versions.Bulk HTTP Status Code CheckerPaste up to 20 URLs and see each one's status code, final destination and response time — in seconds.Robots.txt Tester & ValidatorPaste a URL and see if Googlebot, Bingbot and AI crawlers may visit it — and exactly which rule decides.XML Sitemap ValidatorIs your sitemap valid and full of live pages? URL counts, freshness, errors — and a status check on a sample.llms.txt GeneratorCreate a ready-to-upload llms.txt that tells AI assistants what your site is and which pages matter.

Open Graph Checker & Link PreviewSee how your link will look when shared on Facebook, LinkedIn, WhatsApp and Slack — and fix missing tags.Twitter (X) Card ValidatorPreview how your link appears on X — large image or summary card — and see which tags are missing.Schema Markup ValidatorFind every schema.org item on a page, catch errors and missing properties, and see which rich results it can earn.

DNS & domains

DNS Propagation CheckerChanged your DNS? See what 36 servers around the world answer right now — on a live map.DNS Records LookupEvery DNS record of a domain in one view — A, AAAA, CNAME, MX, NS, TXT, SOA and CAA, each explained.TXT Record LookupSee every TXT record of a domain — verifications, SPF and other rules, labelled so you know what each one is for.CNAME Record LookupWhere does www, shop or blog really point? Follow the alias chain to the final server.Nameserver CheckerFind a domain's name servers and test each one — answers, sync, speed and redundancy, scored out of 100.DNSSEC CheckerIs the domain's DNS signed, and does the chain of trust validate? See the DS record, keys and algorithm.WHOIS Domain LookupWho registered a domain, when, where — and when it expires. Read straight from the official registry.Domain Age CheckerHow old is a website? The exact registration date, age in years and days, and when it expires.

Email deliverability

MX Record LookupWhich servers receive a domain's email? Priority, IPs, provider and the basic authentication records — in one view.SPF Record CheckerIs your SPF record valid? Count DNS lookups, expand every include and see who may send email as your domain.DMARC Record CheckerIs your domain protected from email spoofing? See your DMARC policy, reports and coverage — every tag in plain words.DKIM Record CheckerFind a domain's DKIM keys — type your selector or let us try 50 common ones — and check the key strength.IP & Domain Blacklist CheckerIs your mail server or domain on a spam blacklist? We check your website and mail server IPs on 25 lists at once.

SSL & security

SSL Certificate CheckerIs the HTTPS certificate valid, trusted and far from expiry? Chain, TLS version and HTTPS setup — scored.Security Headers CheckerGrade a site's HTTP security headers from A+ to F — with what each header does and a ready-to-copy value.

Server, hosting & uptime

Website IP LookupTurn a domain into its IP addresses — and see the network, owner, country and reverse DNS of each one.HTTP Header CheckerSee every HTTP response header a URL sends — status, caching, compression, CDN — each explained in plain words.Is It Down Right Now?Down for everyone or just you? We check DNS, the server and the home page from our network — and tell you why.Website Hosting CheckerWho hosts this website? Hosting company, CDN, country, DNS and email provider — in one check.Website Technology CheckerWhat CMS, framework, store platform, analytics and CDN does a website use? See its full tech stack.

Content & writing

Keyword Density CheckerPaste text or a URL to see the most-used words and phrases — and how often your focus keyword appears.Word CounterPaste your text to count words, characters, sentences and paragraphs — plus reading time, readability and top keywords.Character CounterCount characters with and without spaces — and see instantly if your text fits Google, X, Instagram or SMS limits.

Want the full picture? Every Nuqti tool is free to start.

Site Explorer, Keywords Explorer, Site Audit, Rank Tracker and AI visibility — one sign-in with Google, no card.

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