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    Free Technical SEO Tools

    Free Technical SEO Tools — Speed, Crawl, Indexing & More | Seobility
    18 Free Tools · No Signup · Instant Results

    Free Technical SEO Tools
    Fix the Foundation First

    Speed, crawlability, indexing, broken links, sitemaps, robots.txt, accessibility — 18 free technical SEO tools that fix the issues holding your rankings back.

    18Free Tools
    ⚡Core Web Vitals
    🔗Broken Links
    🚀Index Checker
    📋 Table of Contents
      Foundation

      What Is Technical SEO?

      Technical SEO is the practice of optimizing a website’s infrastructure so that search engines can efficiently crawl, index, and rank its pages. While on-page SEO focuses on content and off-page SEO focuses on backlinks, technical SEO focuses on everything underneath — the foundation that makes both work.

      A page with excellent content and strong backlinks will still struggle to rank if Google can’t crawl it, if it loads too slowly, if it has broken links sending users to dead ends, or if it’s blocked from indexing by an accidental robots.txt rule. Technical SEO removes those invisible barriers.

      Technical SEO covers six core areas: page speed and Core Web Vitals (how fast pages load and respond), crawlability (whether Googlebot can access all pages), indexability (whether pages are included in Google’s index), site structure (how pages link to each other), mobile optimization (how well pages perform on mobile devices), and structured data (schema markup that helps Google understand content).

      All 18 technical SEO tools on this page are completely free — no account, no API key, no limits. Use them together for a complete technical audit, or individually to fix specific issues.

      18 Free Tools

      All Free Technical SEO Tools

      Click any tool to open it instantly — no signup required.

      ⚡
      Website Speed Checker
      Check page load speed, Time to First Byte (TTFB), and get a prioritized list of speed improvements to implement.
      5 tools insideOpen →
      📊
      Core Web Vitals Checker
      Measure LCP, CLS, and INP — Google’s three core ranking metrics. See exactly where you pass or fail with fix recommendations.
      4 tools insideOpen →
      🔗
      Broken Link Checker
      Find all 404 errors, broken internal and external links, bad redirects, and redirect chains on any webpage instantly.
      5 tools insideOpen →
      🗺️
      Sitemap & Robots Checker
      Find and validate your XML sitemap, check robots.txt rules, and ensure nothing important is accidentally blocked from crawling.
      5 tools insideOpen →
      🚀
      Google Index Checker
      Check if any URL is indexed by Google. Find de-indexed pages and get the exact reason — noindex tag, blocked URL, thin content, or canonical conflict.
      2 tools insideOpen →
      📱
      Mobile Optimization Checker
      Test mobile-friendliness for Google’s mobile-first indexing. Check viewport, touch targets, font sizes, and mobile speed scores.
      4 tools insideOpen →
      🖼️
      Image SEO Optimizer
      Check alt text, image file sizes, next-gen format usage, and lazy loading implementation across any webpage.
      4 tools insideOpen →
      ♿
      Accessibility Audit Tool
      Check WCAG 2.1 Level AA compliance — find color contrast failures, missing alt text, keyboard navigation issues, and more.
      2 tools insideOpen →
      🚦
      Spam Score Checker
      Check your domain spam score against 27 signals. High spam scores risk Google penalties — audit and disavow toxic links.
      2 tools insideOpen →
      Monthly Routine

      Technical SEO Monthly Audit Checklist

      Run these 7 checks every month to keep your technical SEO in top shape.

      • 1
        Check Page Speed & Core Web VitalsRun the Speed Checker and Core Web Vitals tool. Target LCP under 2.5s, CLS under 0.1, INP under 200ms.
      • 2
        Scan for Broken LinksRun the Broken Link Checker on your most important pages. Fix or redirect all 404 errors immediately.
      • 3
        Validate Sitemap & Robots.txtCheck your XML sitemap is valid and robots.txt isn’t blocking important pages from crawling.
      • 4
        Verify New Pages Are IndexedUse the Google Index Checker on any pages published since last month. Submit unindexed pages via Search Console.
      • 5
        Test Mobile PerformanceRun the Mobile Optimization Checker after any design changes. Google uses mobile-first indexing for all sites.
      • 6
        Check Image OptimizationVerify new images have alt text, are compressed, and use next-gen formats (WebP). Unoptimized images are the #1 LCP killer.
      • 7
        Review Spam ScoreCheck spam score quarterly. If above 30%, audit your backlink profile and disavow toxic links.
      Getting Started

      How to Use Technical SEO Tools

      The recommended sequence for a complete technical audit.

      1

      Speed First

      Start with Speed Checker + Core Web Vitals — slow pages lose rankings regardless of other optimizations.

      2

      Fix Crawl Issues

      Check sitemap and robots.txt — ensure Google can access every page you want indexed.

      3

      Verify Indexing

      Confirm all important pages are in Google’s index — unindexed pages can’t rank.

      4

      Fix Broken Links

      Remove 404 errors and bad redirects — they waste crawl budget and hurt user experience.

      Best Practices

      Technical SEO Best Practices

      The six technical SEO fundamentals every website needs to get right.

      ⚡

      Target LCP Under 2.5 Seconds

      Largest Contentful Paint under 2.5s is Google’s speed threshold. Optimize images to WebP, enable browser caching, and use a CDN to hit this target.

      📱

      Mobile-First Always

      Google indexes the mobile version of your site first. Test every page on mobile after any changes — viewport issues and unclickable buttons tank mobile rankings.

      🗺️

      Keep Sitemap Clean

      Your XML sitemap should only contain pages you want indexed — no noindex pages, no redirect URLs, no broken links. A clean sitemap speeds up crawling.

      🔗

      Fix 404s Within 48 Hours

      Broken links waste Google’s crawl budget and frustrate users. Check weekly and redirect 404 pages to the most relevant live page using a 301 redirect.

      🤖

      Test Robots.txt Before Deploying

      One wrong robots.txt Disallow rule can block your entire site from Google. Always test rules with the robots.txt tester before publishing to production.

      🔒

      HTTPS on Every Page

      Every page must serve over HTTPS. Mixed content warnings (HTTP resources on HTTPS pages) reduce trust signals and can suppress rankings.

      More SEO Categories

      Explore All SEO Tool Categories

      Technical SEO is just one piece — explore all categories.

      📄On-Page SEO Tools 🔑Keyword & Content 💪Link Building Tools 📈SEO Analytics 🎓SEO for Beginners 🏢Agency SEO Tools 🛠️All 74 Free Tools
      Common Questions

      Technical SEO FAQs

      Technical SEO is optimizing a website’s infrastructure so search engines can crawl, index, and rank it effectively. It covers page speed, mobile-friendliness, Core Web Vitals, XML sitemaps, robots.txt, canonical tags, structured data, HTTPS security, and fixing crawl errors — the foundation that makes content and links work.
      Start with the Website Speed Checker for load time and Core Web Vitals, then run the Broken Link Checker for 404 errors, check your Sitemap and Robots.txt, verify pages are indexed with the Google Index Checker, and test mobile with the Image & Mobile Optimization tool. Run all tools monthly.
      Core Web Vitals are three Google ranking signals: LCP (load speed — target under 2.5s), CLS (visual stability — target under 0.1), and INP (interactivity — target under 200ms). Pages that pass Core Web Vitals receive a ranking boost in Google search results.
      Run a full technical SEO audit at minimum once per month. Check for broken links weekly if you regularly update content, check page speed after any major site changes, and check Google indexing status whenever you publish new pages.
      Yes. All 74 tools on Tech4SEO — including all 18 technical SEO tools — are completely free with no account, no API key, and no usage limits, ever.

      Start Your Free Technical SEO Audit

      Run all 18 technical SEO tools free — fix the issues holding your rankings back today.

      Check Page Speed Free → View All 74 Tools

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