SEO Tools
17 free toolsAudit a page, check meta tags, structured data, robots.txt, redirects, and hreflang.
SEO tools start with a full page audit and break out into the single checks you repeat most: meta tags and Open Graph previews, heading structure, structured data validation, robots.txt and sitemap generation, redirect chains, hreflang tags, and IndexNow submission. The results cite the Google documentation they are checking against, and the guides cover the mistakes that quietly cost rankings.
Analyzers fetch the URL you enter through our server (a page cannot be fetched cross-origin from your browser); generators run locally. We do not store the pages we fetch.
All 17 tools
SEO Analyzer
Full SEO audit: paste one URL for a 0–100 score and prioritized fixes across meta, content, links, images, structured data, social, and security headers
Meta Tag Analyzer
Analyze any webpage's meta tags, Open Graph, and Twitter Card data
Heading Structure Checker
Check any page's heading hierarchy for SEO issues
Link Analyzer
Analyze all internal and external links on any webpage
Image SEO Checker
Check images on any webpage for missing alt text and SEO issues
Structured Data Validator
Validate JSON-LD structured data on any webpage
Technology Detector
Detect what technologies any website is built with
Redirect Checker
Follow the full redirect chain for any URL
SEO Report
Run a full SEO analysis on any URL — meta tags, headings, links, images, and structured data, all on one page
HTTP Header Analyzer
Analyze HTTP response headers and check for key security headers
Schema Markup Generator
Generate JSON-LD structured data for any schema.org type
Keyword Density Analyzer
Analyze keyword and phrase frequency in any text
Sitemap Generator
Generate a valid XML sitemap from a list of URLs
IndexNow Submitter
Submit new and updated URLs to Bing, Yandex & friends via IndexNow
UTM Builder
Build campaign URLs with utm_source, medium, and campaign tags
Robots.txt Tester
Test whether a URL is allowed or blocked for a given crawler by a robots.txt file
Hreflang Tag Generator
Generate hreflang link tags, sitemap XML, or HTTP headers for multilingual pages
Guides
From the blog: the mechanisms, standards, and edge cases behind these tools.
- The Complete On-Page SEO Checklist (45 Checks, Free Tools Included) A practical, developer-focused on-page SEO checklist for 2026 — meta tags, headings, content, links, images, structured data, Core Web Vitals, security headers, and crawlability, each with a free tool to check it. May 25, 2026 · uses SEO Analyzer, Meta Tag Analyzer, Heading Structure Checker +10
- Free Seobility Alternative: Single-Page SEO Checks Without an Account Seobility is strong for site crawls and rank tracking. For quick one-page SEO checks with no account and no daily cap, here is an honest free alternative. Oct 16, 2026 · uses SEO Analyzer, Meta Tag Analyzer, Image SEO Checker +4
- Free Alternative to Neil Patel's SEO Analyzer (No Login, Technical Checks Included) Neil Patel's free SEO audit needs a form and opts you into marketing email. This no-login alternative adds security header, JSON-LD and redirect checks. Oct 16, 2026 · uses SEO Analyzer, Meta Tag Analyzer, Structured Data Validator +3
- Every HTML Meta Tag That Matters for SEO (and the Ones Google Ignores) The head tags that change indexing or how your result looks, the robots directives Google honors, the tags it ignores, and the canonical edge cases that bite. Oct 16, 2026 · uses SEO Analyzer, Meta Tag Analyzer, Redirect Checker +1
- How Website Technology Detection Works (and Why It's Often Wrong) How website technology detection works: the meta tags, HTML fingerprints, headers and cookies every detector reads, why they misfire, and how to hide yours. Sep 12, 2026 · uses SEO Analyzer, Meta Tag Analyzer, Technology Detector +1
- hreflang Mistakes That Silently Break: en-UK, Self-Links, x-default Why en-UK does nothing, why every page must list itself, what x-default is for, and which hreflang errors a validator can catch versus the ones only a crawl finds. Sep 27, 2026 · uses HTTP Header Analyzer, Sitemap Generator, Hreflang Tag Generator
- IndexNow vs. Sitemaps: What It Does, Which Engines Use It, and Why Google Is Not One IndexNow pushes URLs to search engines instead of waiting to be crawled. Which engines actually consume it, how key verification works, every response code, and an honest read on whether it is worth your time. Jul 29, 2026 · uses Sitemap Generator, IndexNow Submitter, Hreflang Tag Generator
- 301 vs 302 Redirects: Which to Use, and How to Check What You Actually Send Permanent vs temporary redirects, where 307 and 308 fit, why redirect chains cost you rankings, and the config snippets for Apache, nginx, Cloudflare, Netlify, and Next.js. Jul 25, 2026 · uses SEO Analyzer, Redirect Checker, Sitemap Generator
- Structured Data & JSON-LD: A Practical Guide to Rich Results A developer-focused guide to structured data and JSON-LD — what schema.org markup actually does for search, why JSON-LD beats microdata, which schema types earn rich results, where to put the script, and how to validate it before it ships. Jun 29, 2026 · uses SEO Analyzer, Structured Data Validator, Schema Markup Generator
- HTTP Status Codes: The Reference You Actually Use, With the SEO Ones Flagged The HTTP status codes developers actually meet, by class, plus the confusing pairs: 301 vs 308, 404 vs 410, 401 vs 403, 429, 503 and soft 404s. Oct 16, 2026 · uses Redirect Checker, HTTP Header Analyzer
- Keyword Density in 2026: What the Number Tells You (and What It Never Did) There is no ideal keyword density, and Google never published one. What the ratio measures, how stop words skew it, and the four jobs it is still good for. Oct 16, 2026 · uses SEO Analyzer, Keyword Density Analyzer
- Disallow Doesn't Mean Deindex: What robots.txt Actually Controls robots.txt controls crawling, not indexing — a Disallowed URL can still rank from external links, and Google dropped robots.txt noindex in 2019. How RFC 9309 matching really works, when to use noindex instead, and a percent-encoding edge case almost nobody documents. Aug 20, 2026 · uses Sitemap Generator, Robots.txt Tester