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Eight free SEO tools. Real checks, instantly.

Paste a URL and get a technical check on the spot: no signup, no account. When one page isn’t enough, crawl your whole site against 240+ checks, and your first full audit is free.

Last reviewed · 1 Oct 20267 primary sources →Kalenux engineering
https://Check my site
Technical SEOIndexabilitySitemapCanonicalMeta TagBroken LinkHreflangPageSpeed
instant check · example.com● done in 4s
72
Homepage health2 issues to fix before anything else.14 passed3 warnings2 failed
Indexablenoindex found on templateFAIL
Canonicalpoints to redirected URLFAIL
Title tag68 chars, may truncateWARN
Sitemapfound via robots.txtPASS
HTTPSvalid, HSTS setPASS
LCP (mobile)2.4 sPASS
illustrative result
8free instant tools
0signups to use them
240+checks in the full audit
1free full-site audit
// the tools

Every tool, and what its result looks like.

Each runs on a single URL, on the spot. Previews show the shape of a typical result.

86
Indexability
Canonicals
Redirects
CRAWL & INDEXTechnical SEO CheckerThe full crawl-based audit across every page: indexability, canonicals, hreflang, schema, sitemaps and redirects.✓Status codes on every URL✓Directive conflicts✓Schema validityRun free →
HTTP status200
meta robotsnoindex
robots.txtallowed
canonicalself
CRAWL & INDEXIndexability CheckerFind pages Google can’t index: noindex tags, robots.txt blocks, canonical conflicts and crawl issues.✓meta robots & X-Robots-Tag✓robots.txt rules✓HTTP statusRun free →
sitemap_index.xml├─ pages.xml · 142 ✓├─ posts.xml · 1,208 ✓└─ products.xml · 37 redirect
CRAWL & INDEXSitemap ValidatorLocate and validate your XML sitemap: structure, URL count, HTTPS consistency and live status.✓Discovery via robots.txt✓XML validity✓Live status of listed URLsRun free →
/shoes?color=red↓ rel=canonical/shoes200
CRAWL & INDEXCanonical CheckerCheck rel=canonical tags: self-referencing, resolving to live 200 URLs, no canonical-to-redirect.✓Presence & self-reference✓Target returns 200✓No canonical to redirectRun free →
yoursite.com › shoesRunning Shoes for Every Distance | YourSiteLightweight, cushioned running shoes tested on road and trail…title 45/60 · description 148/160
ON-PAGEMeta Tag CheckerTitle, meta description, canonical, viewport and Open Graph tags: present, sized right, correct.✓Title & description length✓Duplicates across pages✓Open Graph tagsRun free →
/blog/old-guide404
/pricing-2023301 → 301
/about200
ON-PAGEBroken Link CheckerFind broken internal and outbound links, redirect chains and broken redirects, with their source pages.✓Internal & outbound links✓Redirect chains✓Source page for eachRun free →
endefren✓✓✓de✓✓✓fr✓✕✓
ON-PAGEHreflang CheckerValidate reciprocal hreflang, self-references and language codes for international sites.✓Reciprocal return links✓Valid language codes✓x-defaultRun free →
LCP2.1s
INP180ms
CLS0.18
PERFORMANCEPageSpeed TestReal Core Web Vitals (LCP, CLS, INP) on your key templates, mobile and desktop.✓LCP, INP and CLS✓Mobile and desktop✓Key templatesRun free →
// fix order

Run them in this order.

Technical SEO has a dependency order. Work out of sequence and effort goes to pages that could never have ranked.

STEP 01START HERE
Reachable & indexableA gate, not a scale. Blocked, noindexed or non-200 pages rank nowhere.Technical SEOIndexabilitySitemapCanonical
STEP 02
UnderstoodTitles, descriptions, headings and schema that describe the page. Usually template-level fixes.Meta Tag
STEP 03
ConnectedA site is a graph. Broken links, chains, orphans and hreflang only show across pages.Broken LinkHreflang
STEP 04
FastThe only tier where a bad score still ranks. Measure with real field data.PageSpeed
INSTANT CHECK VS FULL AUDITOne page now, or the whole site.
INSTANTFULL AUDIT
ScopeYour homepageEvery page on your site
ChecksOne tool’s checkAll 240+ rules + PageSpeed
AccountNoneFree, one credit on signup
History–Health score over time
ExportOn-screenEvery issue to CSV
CostFreeFirst audit free, then from $9
Broad keyword and backlink suites cost $100+ a month. These tools do technical health and PageSpeed only, at one-time pricing. Compare →
WHAT A CRAWL FINDSFaults you can’t see from one page.
TEMPLATEnoindex shipped from staging to a whole sectionblocks ranking
TEMPLATECanonical pointing at a URL that no longer existsblocks ranking
STRUCTUREOrphan pages no internal link reachesleaks value
STRUCTURERedirect chains between link and destinationleaks value
DECAYOutbound links rotting as other sites reorganiseleaks value
DECAYSitemap drifting out of step with the real siteleaks value
Grouped by cause, 4,000 page-level rows usually become 15–20 real fixes.
// performance thresholds

The three numbers behind the PageSpeed Test.

Assessed at the 75th percentile of real visits. Lab scores on a fast connection often disagree with mobile reality.

LCPLargest Contentful PaintMain content visible
▼
GOOD≤ 2.5 sNEEDS WORK≤ 4 sPOOR> 4 s
INPInteraction to Next PaintResponse to a tap or click
▼
GOOD≤ 200 msNEEDS WORK≤ 500 msPOOR> 500 ms
CLSCumulative Layout ShiftUnexpected movement
▼
GOOD≤ 0.1NEEDS WORK≤ 0.25POOR> 0.25
// guides and comparisons

Pick the right tool, audit your platform.

GUIDEBest free SEO audit tools11 free tools tested and compared, grouped by the job they do.Search Console shows what Google did with your pages; PageSpeed Insights covers Core Web Vitals. Where free stops is site-wide crawling with history.Read the guide →COMPARISONScreaming Frog alternativesWeb-based crawlers with no install, RAM limit or URL cap.A site crawl compares every page against every other: how template faults, orphans and redirect chains surface.Read the guide →COMPARISONKalenux vs Screaming Frog vs AhrefsAn honest side-by-side of where each tool wins.Keyword and backlink suites run $100+ a month; Kalenux focuses on technical health and PageSpeed at one-time pricing.Read the guide →PRICINGAffordable SEO auditA full-site audit from $9 one-time, no subscription.First audit free with a credit on signup, no card. Every audit crawls all pages against 240+ rules plus PageSpeed.Read the guide →PLATFORMWordPress SEO auditThe technical issues WordPress sites are prone to.Faults ship in shared templates and plugins; an update can quietly make a ranking page non-indexable.Read the guide →PLATFORMShopify SEO auditThe technical issues Shopify stores are prone to.One template fault reaches every product it renders, and one template fix clears it everywhere.Read the guide →
in depth · 7 primary sources

What each free tool checks against.

The documentation behind the free tools.

01Fix in pipeline order

Google crawls, indexes, then serves [2], so crawl and indexability tools come first, then links and sitemaps, then speed and markup. The baseline is Google’s three technical requirements [1].

02Speed tools use published thresholds

Good Core Web Vitals are LCP ≤ 2.5 s, INP ≤ 200 ms and CLS ≤ 0.1 [3]. Google uses them in ranking but says good scores alone don’t guarantee top positions [4].

03Links, locales and Google’s view

Link checks follow Google’s crawlable-link rules [5]; hreflang checks follow its localized-versions guide [6]. Confirm any finding in Search Console’s Page indexing report [7].

KEY FACTEach tool page has its own cited In depth section.

References

  1. [1]Technical requirements (Search Essentials) · Google Search Centraldevelopers.google.com/search/docs/essentials/technical
  2. [2]In-depth guide to how Google Search works · Google Search Centraldevelopers.google.com/search/docs/fundamentals/how-search-works
  3. [3]Web Vitals · web.devweb.dev/articles/vitals
  4. [4]Understanding Core Web Vitals and Google search results · Google Search Centraldevelopers.google.com/search/docs/appearance/core-web-vitals
  5. [5]Link best practices for Google · Google Search Centraldevelopers.google.com/search/docs/crawling-indexing/links-crawlable
  6. [6]Tell Google about localized versions of your page · Google Search Centraldevelopers.google.com/search/docs/specialty/international/localized-versions
  7. [7]Page indexing report · Search Console Helpsupport.google.com/webmasters/answer/7440203
CITE THIS PAGEKalenux. (2026). Free SEO tools: check your site instantly, no signup. Kalenux SEO Guide. Last reviewed 1 Oct 2026. kalenux.com.tr/seo-tools
// the whole picture

Audit your whole site for free.

240+ technical checks plus PageSpeed on every page, a health score tracked over time and a full CSV export: the same engine behind our own 10+ production sites. One free credit on signup, no card.

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