Technical SEO Tools: Find and Fix Website Issues

Technical SEO tools help answer a practical question: can people and search engines reach, understand and use the pages that matter? A useful audit produces evidence, a prioritized action and a check after the correction.

This guide groups indexing platforms, crawlers, performance tools, structured-data checks and page inspectors. Return to the SEO tools hub for research, links, analytics and rank monitoring.

Start with a small, important set of pages

Include the homepage, a main service, the contact page and a few representative articles or products. Write down what each page should do. A blocked service page and an intentionally excluded internal utility page should not receive the same treatment.

Access: open the page and test the important links and actions.
Search-engine reporting: inspect the URL and the reported reason for its state.
Site structure: look for broken internal links, unexpected redirects and important pages that are difficult to find.
Experience: test the page on mobile and investigate loading or interaction problems.
Verification: reproduce the problem before changing anything, then repeat the relevant check afterward.

Back up the site and use a test environment for changes that could affect templates, redirects, scripts or user journeys. An automated warning is not a command to change production immediately.

Choose tools by the evidence you need

Indexing platforms describe information from a particular engine. Crawlers inspect the URLs they can discover under their configuration. Performance tools measure under specific conditions. Structured-data tests validate a particular kind of markup. Keep these boundaries in mind as you use the resources below.

Search-engine reporting

Search Console — Search Console supplies information about your own site in Google Search. Inspect a specific URL and its reported indexing state before proposing a technical fix.
Yandex Webmaster — Yandex’s webmaster platform, retained for sites with a relevant audience. Its reports describe its own ecosystem and do not replace Google or Bing diagnostics.
Bing Webmaster — Bing Webmaster Tools supplies site information for Bing. Follow the setup guide, submit the appropriate sitemap and investigate the URLs that matter to your business.

Crawling, audits and logs

Wayback Machine — The Wayback Machine helps review earlier public versions of a page. Archive coverage is incomplete and does not replace your own backups or change log.
headmasterseo.com — A URL and redirect-checking resource from the original hub. Use a documented list of old and new URLs when evaluating a migration.
Raventools.com — Raven Tools is retained as a broader SEO audit and reporting resource. Match the current functions to the data you need and confirm export access before choosing it.
Seolyzer — Log-oriented SEO analysis. Server requests can help explain crawler behavior, but logs need appropriate access controls and interpretation.
Seomator.com — A technical audit resource. Check crawl coverage and whether the report gives enough evidence to reproduce its findings.
Seositecheckup.com — A website-checking resource. Treat automated checks as prompts for investigation, not a search-engine verdict.
Botify.com — An enterprise technical-SEO resource. Consider it in the context of large-site crawling and organizational requirements, rather than as a necessary tool for a small new site.
Lumar (formerly DeepCrawl) — DeepCrawl now redirects to Lumar. The platform addresses website optimization at scale. The original DeepCrawl URL is retained so existing references remain identifiable.
Screaming Frog SEO — Screaming Frog SEO Spider crawls site URLs to inspect issues such as response codes, titles and directives. Set the crawl scope and export the source URLs needed to reproduce each problem.
Seobility — A site-auditing platform. Use its issue lists to locate affected pages and verify the problem yourself before changing templates or content.
Woorank — Website review and audit reporting. A summary score can help with triage; the useful deliverable is the URL, the observed issue and a justified action.

Performance and browser diagnostics

PageSpeed Insights — PageSpeed Insights combines performance diagnostics with field data when available. Separate a laboratory run from the experience measured across real visits.
Chrome DevTools — Chrome DevTools helps inspect requests, rendering and interaction work in the browser. A local trace is a diagnostic observation, not a report of every visitor’s experience.
Chrome UX Report — Chrome UX Report is a source of aggregated real-user experience data for eligible pages and origins. Check its coverage and reporting period.
Lighthouse — Lighthouse provides automated page audits. Its scores and opportunities are diagnostic aids; a high SEO score is not a ranking forecast.
GTMetrix — Performance testing and diagnostics. Keep test location, device profile and conditions comparable when assessing a change.
Core Web Vitals — The original Core Web Vitals tools reference is retained. Use current documentation to distinguish lab testing, local debugging and field measurement.
Web Vitals — The original Web Vitals documentation address is retained. Current Core Web Vitals are LCP, INP and CLS; older FID-based instructions need updating.
Web Page Test — Page-load investigation with timing and request detail. Record the test configuration and use the results to isolate a specific loading problem.
DareBoost — Website performance and quality analysis. Check current test availability and keep a record of the conditions used.
Google Chrome — The browser reference from the original technical guide. Its developer tools are useful for inspection; installing a browser is not itself an SEO optimization.

Structured data

Schema.org — The vocabulary reference for structured data. A valid vocabulary term is not automatically a Google-supported rich-result feature.
Rich Results Test — Google’s Rich Results Test checks supported structured-data features. Passing a test does not guarantee a rich result will appear.
Schema Markup Generator — Schema Markup Generator helps prepare structured-data markup. Check that the result describes visible, accurate page content and validate it for the intended use.

Page, content and WordPress inspection

View Rendered Source — View Rendered Source is retained as an extension reference for comparing source and rendered HTML. Check current store availability and permissions before installation.
Digital Mustafa — how a search engine works — An explanatory search-engine resource retained from the original article. Read it as background material, and use current engine documentation for implementation details.
Rank Math — Rank Math’s WordPress SEO plugin reference. Check sitemap, metadata and schema responsibilities before enabling overlapping features in multiple plugins.
Seo Minion — Browser-based SEO inspection resource. Verify the current product and access conditions rather than repeating an old claim that all features are free.
SerpSim — A search-snippet preview resource. It helps review wording, but Google can generate a different title or snippet and does not promise one fixed pixel layout.
BrowSeo — A simplified page-inspection view. Use it to investigate content and page elements; it does not reproduce every aspect of a search engine’s rendering and indexing systems.
Copyscape — Cross-site content comparison, complementary to within-site checks. A similarity match needs editorial review before any conclusion about copying.
Seo Quake — A browser SEO toolbox. Use page-level observations to support a question, rather than treating every displayed metric as a target.
SiteLiner — Within-site content comparison. Investigate similarity in context: shared menus and legitimate repeated elements do not make every page a duplicate-content problem.
Yoast Plugin — Yoast’s WordPress SEO plugin reference. Configure the features you need and check their output; a plugin does not create a complete content strategy for you.

Legacy and availability notes

Historical references: the addresses below remain identifiable, but they are not required steps in the workflow. Follow the status note for each entry.

Xenu — Xenu’s Link Sleuth is retained as a historical link-checking reference. Check compatibility and the publisher’s download provenance before considering old desktop software.
forecheck.com — A historical crawler reference. Current availability and platform compatibility remain to be checked; use the verified workflow below independently of this entry.
SEO Web Page Analyzer — A historical single-page analysis reference. Availability remains to be checked; do not treat its former description as proof of a current service.
Web Vitals Chrome extension — Legacy Web Vitals extension. Chrome ended support in January 2025 after integrating its features into the DevTools Performance panel.
Structured Data Testing Tool — Legacy Google Structured Data Testing Tool address. Keep the reference for readers of older material; use current validation appropriate to Schema.org or Google rich results.
Mobile Friendly Test — Retired Google Mobile-Friendly Test. Google retired it in December 2023. Use real-device testing and current browser diagnostics instead of asking readers to run this tool.
Varvy SEO tool — Historical SEO checking resource. Current availability has not been confirmed; do not interpret an old automated score as compliance with every Google guideline.
web.dev’s measure tool — Historical web.dev measurement entry point. Do not require this old route; use current PageSpeed Insights and DevTools instructions instead.
SEO Workers — A historical SEO analysis reference. Availability remains to be checked, and no claim that it predicts ranking potential is retained.

Turn findings into a practical work list

For each finding, keep the source of evidence, affected URL, observed behavior, expected behavior, action, owner and verification. Start with business-critical failures: a service page returning an error, a broken contact journey or an unintended indexing directive on content intended for search.

Example: a fictional migration leaves an old service URL linked from the main menu. Open the source page, follow the link and record the result. Identify the correct destination, update the internal link and test it. If a redirect is also appropriate, verify its destination and avoid an unnecessary chain.

Keep exclusions that serve a clear purpose. A report containing “not indexed” pages is not automatically a list of pages that all need indexing. Investigate whether each URL is intended to appear, whether a canonical alternative exists and what the engine actually reports.

Measure performance in the right context

A single laboratory test is a reproducible diagnostic sample. Field data, when available, describes aggregated real experiences over a reporting period. Keep the device, location, network profile and date with your test.

Current Core Web Vitals are LCP, INP and CLS. FID-based explanations need updating. Do not apply lazy loading to every visible hero image or defer every script automatically; identify the resource or work causing the problem, then test the result and the page’s functions. Current Web Vitals documentation.

Validate markup without inventing page facts

Choose structured data that describes what is actually on the page. A generator saves typing but cannot decide whether a claim is accurate. Check the vocabulary and the requirements of the feature you are targeting.

Passing a supported-feature test does not promise a particular search appearance. Keep visible content and markup aligned, and retest after template changes. Search previews and plugin indicators are aids, not exact predictions of every result page.

Use current workflows for older references

The original collection includes older tools and addresses. They remain identifiable here, but retired entries are separated from the active workflow. Google retired its Mobile-Friendly Test in December 2023. Chrome ended support for the Web Vitals extension in January 2025 after merging its features into DevTools.

Use real-device checks and current browser diagnostics for mobile usability. Use the current DevTools Performance panel for local performance investigation. Legacy tool links are not installation instructions. Google retirement notice · Chrome migration notice.

Frequently asked questions

Should every warning be fixed?

Review the affected page and its purpose first. Prioritize verified problems with a meaningful impact over cosmetic scores or intentional exclusions.

Can a crawler explain every indexing decision?

No. Its crawl is one source of evidence. Combine it with engine-specific reports, the page’s behavior and your intended configuration.

Where should I start with WordPress?

Check access, important pages, navigation and contact delivery. Then verify which tool controls metadata, sitemaps and schema so overlapping plugins do not create confusing output.

Once technical obstacles are understood, use keyword research to improve page relevance and analytics to understand the visitor’s next action.

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