Free SEO Tools Online

Good SEO is mostly careful measurement: is the title the right length, are headings structured, does the schema validate? NToolHub\'s SEO tools analyze the content you paste and generate ready-to-use code — meta tags, JSON-LD schema, robots.txt — so you can fix issues the same afternoon you find them.

Article Schema Generator

Generate valid Article JSON-LD schema for blog posts and news articles. Rich-result-ready structured data, free with NToolHub — no sign-up required.

Breadcrumb Schema Generator

Generate BreadcrumbList JSON-LD schema for clean breadcrumb rich results in Google. Free Breadcrumb Schema Generator from NToolHub — no sign-up needed.

Canonical URL Generator

Generate canonical link tags and audit URL variants for duplicate-content issues. Free Canonical URL Generator from NToolHub — no sign-up needed.

DNS Lookup

DNS Lookup helper: copy-ready dig and nslookup commands plus one-click DNS links. Honest, free DNS research tool by NToolHub — no fake results.

Domain Age Checker

Calculate exact domain age from the WHOIS creation date — years, months, days. Free Domain Age Checker with an honest method — no sign-up needed.

Domain To IP

Domain to IP helper: real dig and nslookup commands plus DNS resolver links. Honest IP resolution walkthrough — free from NToolHub, no sign-up.

External Link Checker

Audit outbound links for missing noopener, nofollow misuse and dead hrefs. Free External Link Checker — security-first SEO audit, no sign-up.

FAQ Schema Generator

Generate FAQPage JSON-LD schema from your questions and answers in seconds. Free FAQ Schema Generator by NToolHub — build rich-result eligibility fast.

Favicon Generator

Create a crisp PNG favicon from any emoji with a custom background color. Free Favicon Generator — renders instantly in your browser, no upload.

Google Search Preview

Live Google-style search result preview for desktop and mobile layouts. Free Google Search Preview tool — updates as you type, no sign-up needed.

Heading Analyzer

Analyze H1–H6 heading structure: hierarchy outline, counts and SEO issues flagged. Free Heading Analyzer by NToolHub — instant audit, no sign-up.

HTML Source Viewer

View any page’s HTML source via bookmarklet and view-source URL opener. Free HTML Source Viewer — the honest method, no sign-up needed, private.

HTTP Header Checker

HTTP Header Checker helper: real curl commands plus SecurityHeaders.com scans. Honest header inspection walkthrough — free, no sign-up needed.

Image Alt Checker

Audit every image for missing, empty or overlong alt text with a coverage score. Free Image Alt Checker — accessibility and image SEO in seconds.

Internal Link Checker

Extract and audit all internal links: anchor text, hrefs and issues flagged automatically. Free Internal Link Checker by NToolHub — no sign-up.

IP Lookup

IP Lookup helper: validated IP routed to ipinfo, AbuseIPDB and top services. Honest IP intelligence links — free, no sign-up required, private.

IP To Domain

Reverse DNS helper: real PTR lookup commands and a MXToolbox lookup link. Honest IP-to-domain research method — free from NToolHub, no sign-up.

JSON Ld Generator

Flexible JSON-LD generator for any schema.org type with custom properties support. Free structured data builder from NToolHub — no sign-up required.

Keyword Cluster Tool

Group keywords into topic clusters by word stem for content planning. Free Keyword Cluster Tool — build pillar pages and site structure, no sign-up.

Keyword Comparison

Compare two texts’ top keywords side by side and uncover topical gaps. Free Keyword Comparison tool — smart content gap analysis, no sign-up.

Keyword Counter

Count multiple keywords at once — occurrences and density side by side. Free Keyword Counter tool by NToolHub — balance your content fast, no sign-up.

Keyword Density Checker

Analyze keyword density free online for better SEO. Top keywords with counts and density percentages, stop-word filtering included — no sign-up.

Local Business Schema Generator

Generate LocalBusiness JSON-LD with address, hours, geo coordinates and contact details. Free Local Business Schema Generator — no sign-up needed.

Manifest Generator

Generate a manifest.webmanifest for your PWA — icons, colors, display mode and more. Free Web Manifest Generator — download instantly, no sign-up.

Meta Description Checker

Check meta description length and quality for higher click-through rates. Free Meta Description Checker by NToolHub — polish every snippet, no sign-up.

Meta Tag Generator

Generate SEO and social meta tags with NToolHub’s free tool. Title, description, Open Graph, Twitter cards — copy-ready HTML head code.

Meta Title Checker

Check title tag length in characters AND real pixel width against Google’s limits. Free Meta Title Checker — stop truncation before it costs clicks.

Mobile Meta Checker

Verify viewport, theme-color and mobile web-app meta tags for mobile SEO. Free Mobile Meta Checker — mobile SEO essentials, instant audit, no sign-up.

Open Graph Generator

Generate Open Graph meta tags for rich social previews on Facebook, LinkedIn and Slack. Free OG Tag Generator from NToolHub — no sign-up needed.

Page Size Checker

Measure HTML page size with a real in-browser gzip transfer-size estimate. Free Page Size Checker — performance insights for better SEO, no sign-up.

Product Schema Generator

Generate Product JSON-LD with price, availability, brand and review ratings. Free Product Schema Generator from NToolHub — rich results ready fast.

Redirect Checker

Redirect Checker helper: real curl chain-tracing commands and tracer links. Audit every redirect hop honestly — free from NToolHub, no sign-up.

Robots Txt Generator

Generate robots.txt files visually with NToolHub’s free tool. Allow/disallow rules, sitemap reference, crawl delay — copy-ready.

Schema Markup Generator

Generate Organization schema markup with logo, contact point and social profiles. Free Schema Markup Generator from NToolHub — no sign-up needed.

SEO Friendly URL Generator

Build clean, keyword-rich SEO URLs with an automatic 5-point audit. Free SEO Friendly URL Generator — get your site structure right, no sign-up.

SEO Score Checker

Score pasted page HTML against 10 essential on-page SEO checks with fixes. Free SEO Score Checker — instant technical audit, no sign-up needed.

Serp Snippet Preview

Preview your Google search snippet with live character and pixel-width truncation checks. Free SERP Snippet Preview tool by NToolHub — no sign-up.

Sitemap Generator

Generate XML sitemaps free with NToolHub. Paste URLs, set priority and change frequency — valid sitemap.xml in seconds, 100% private.

Slug Generator

Convert any title into a clean, URL-safe slug instantly. Free Slug Generator — lowercase, de-accented and copy-ready in one click, no sign-up.

Text Readability Checker

Score your text with Flesch Reading Ease and Flesch-Kincaid grade level. Free Text Readability Checker — write clearer, higher-converting content.

Twitter Card Generator

Generate Twitter Card meta tags for large-image summaries on X (Twitter). Free Twitter Card Generator by NToolHub — instant results, no sign-up.

URL Cleaner

Strip gclid, fbclid, utm_* and 20+ trackers from any URL. Free URL Cleaner — privacy-friendly, shareable links in seconds, no sign-up needed.

URL Status Checker

URL Status Checker helper: real curl status commands and a code reference guide. Verify 200s, 404s and 5xx honestly — free tool, no sign-up.

UTM Builder

Build perfectly encoded UTM campaign URLs in seconds — source, medium, campaign. Free UTM Builder by NToolHub — track every campaign accurately.

UTM Remover

Strip utm_* tracking parameters from any URL instantly. Free UTM Remover — get clean, shareable links in one click, no sign-up needed, private.

Web Manifest Checker

Validate your PWA manifest JSON with 10 installability checks, scored. Free Web Manifest Checker — paste your JSON and verify instantly, no sign-up.

Website Schema Generator

Generate WebSite JSON-LD schema with optional sitelinks search box markup. Free Website Schema Generator from NToolHub — instant results, no sign-up.

WHOIS Lookup

WHOIS Lookup helper: terminal commands plus ICANN, who.is and RDAP lookup links. Honest domain research — free from NToolHub, no sign-up needed.

Word Count SEO

Count words, reading time and keyword density for SEO-ready content. Free Word Count SEO tool — check depth before you publish, no sign-up needed.

Www Redirect Checker

Test all 4 www/non-www and http/https variants with copy-ready curl commands. Free WWW Redirect Checker — full canonicalization audit, no sign-up.

About Our SEO Tools

Note: browsers can\'t perform live network lookups (WHOIS, DNS, HTTP headers), so those pages honestly explain the limitation and give you the exact commands and links to check manually instead of faking results.