A website can look fine on the homepage while hiding broken pages, slow templates, duplicate titles and mobile issues deeper in the site. The best website audit tools help you find those problems before they cost rankings, enquiries or sales. The right choice depends on whether you need a quick free check, a full SEO crawl or a clear report for a client.
What a website audit tool should check
A useful audit does more than give your site a score. It should identify pages that cannot be indexed, links that lead nowhere, titles that need work, images that are too heavy and performance issues affecting real visitors.
For small sites, a free browser-based report may be enough to create a practical fix list. Larger WordPress, ecommerce and service websites usually need a crawler that can inspect hundreds or thousands of URLs. If you manage client sites, reporting and project tracking can matter as much as the audit itself.
Start with the problems you want to solve. A slow landing page needs different data from a site with falling search traffic. Running every available audit without a plan often creates a long list of warnings and very little progress.
10 best website audit tools to consider
1. Google Search Console
Google Search Console is the first tool most site owners should set up. It shows how Google discovers, indexes and presents your pages in search results. Use it to find indexing errors, sitemap issues, mobile usability concerns, Core Web Vitals data and search queries bringing people to your site.
It is free and based on Google’s own view of your website, which makes it essential. Its limitation is that it is not a full technical crawler. It can tell you that pages are excluded or underperforming, but it will not always provide the complete on-page fix list that a dedicated crawler delivers.
2. Google PageSpeed Insights
PageSpeed Insights is a fast, free way to test a page on mobile and desktop. It reports Core Web Vitals and highlights common causes of slow loading, such as oversized images, unused code and delayed server responses.
This tool is especially useful when a page feels slow or when Search Console reports poor performance. Treat the recommendations as priorities, not a checklist to complete blindly. A suggested code change may require a developer, and chasing a perfect score can sometimes harm useful features or visual quality.
3. Screaming Frog SEO Spider
Screaming Frog is a desktop crawler built for detailed technical audits. It can find broken links, redirects, duplicate pages, missing metadata, oversized images, canonicals, hreflang tags and many other issues across a site.
It is one of the best choices for SEO professionals and site owners who want control over the crawl. The free version has a crawl limit, while paid access is more suitable for bigger websites and regular auditing. It has a learning curve, so it is best for people prepared to review data rather than rely on a single overall score.
4. Semrush Site Audit
Semrush Site Audit combines crawling with a clean dashboard that sorts issues by severity. It is useful for monitoring technical SEO over time, assigning tasks and seeing whether key errors have been fixed after a WordPress update, migration or redesign.
Semrush works well for businesses already using its keyword research and competitor tools. The trade-off is cost. For a one-off audit of a small brochure website, its wider subscription may be more than you need. For ongoing SEO work, the combined toolkit can save time.
5. Ahrefs Site Audit
Ahrefs Site Audit offers a clear visual overview of technical SEO health, with reports for crawlability, internal links, HTML tags, content quality and performance. It is particularly useful when you want to connect technical fixes with keyword and backlink research in the same platform.
Its interface makes recurring audits easier to follow than raw crawler exports. However, site health scores should not become the goal. A lower-priority warning is less urgent than a page that cannot be indexed, a broken checkout path or a page with a major traffic drop.
6. Sitebulb
Sitebulb is a desktop auditing tool known for turning complex crawl data into plain-English hints. It provides visual reports for site architecture, internal linking, duplicate content, page experience and structured data.
This is a strong option for consultants, agencies and experienced owners who need to explain issues clearly to clients or developers. It is less suited to someone who only needs a five-minute health check. Its value comes from careful investigation and repeatable audit workflows.
7. SE Ranking Website Audit
SE Ranking provides a practical middle ground for freelancers and small businesses. Its website audit feature checks technical problems, on-page elements, links, speed and mobile readiness, while its wider platform includes rank tracking and keyword tools.
The reports are generally easier to act on than highly technical crawler data. It is a sensible choice when you need ongoing monitoring without paying for an enterprise-level platform. As with any cloud audit tool, check crawl limits and project allowances before choosing a plan.
8. Moz Pro Site Crawl
Moz Pro Site Crawl is designed to flag common technical SEO issues in a manageable format. It can help spot missing page titles, duplicate content, broken links, redirects and crawl issues without overwhelming newer users.
Moz is useful for marketers who want a simple way to monitor website hygiene alongside keyword and link metrics. It may not offer the same depth of crawl configuration as specialist desktop software, but that simplicity can be an advantage for teams that need clear actions rather than endless data.
9. GTmetrix
GTmetrix focuses on page speed and loading behaviour. It lets you see how a page loads over time, which files are delaying it and how page weight affects performance. This is helpful for image-heavy portfolios, online shops and landing pages with many scripts.
Use GTmetrix after compressing images, changing a theme or adding marketing tools such as chat widgets and tracking tags. Test more than the homepage. Product pages, blog posts and contact forms can load very differently, especially on mobile connections.
10. WebPageTest
WebPageTest is a detailed performance testing tool for users who need more technical evidence. It can test from different locations and browsers, showing waterfalls, rendering behaviour and loading milestones.
It is particularly valuable when developers need to diagnose a specific speed issue. The interface is less beginner-friendly than a simple score-based checker, but the detail is useful when a quick recommendation such as “optimise images” does not explain what is actually slowing a page.
How to choose the right tool for your site
Choose free tools first if you run a small site and need immediate answers. Google Search Console and PageSpeed Insights cover indexing and performance without requiring paid software. They are a sensible starting point for bloggers, local services and new business websites.
Choose a crawler if you are changing URLs, moving to a new domain, rebuilding a WordPress website or managing many pages. Screaming Frog and Sitebulb can reveal issues that a single-page browser test will miss, including redirect chains, orphan pages and weak internal linking.
Choose an all-in-one platform if audits are part of monthly SEO work. Semrush, Ahrefs, SE Ranking and Moz Pro make more sense when you also need rank tracking, keyword research or client reporting. Do not pay for a large suite just because it has more charts. Pick the tool your team will use consistently.
Turn audit results into useful fixes
Start with problems that block search engines or visitors. Fix pages returning errors, accidental noindex tags, broken internal links, redirect loops and important pages excluded from indexing. Next, work on speed problems that affect key pages, especially mobile landing pages and checkout routes.
Then improve quality signals: duplicate titles, weak meta descriptions, thin content, missing image alt text and confusing internal links. These are not always emergencies, but they make a site harder for people and search engines to understand.
Keep a simple record of each fix, the page affected and the date completed. Re-run the audit after major changes instead of assuming a plugin, theme update or developer edit worked as expected. For quick image preparation before testing page speed, a free in-browser converter or compressor can also reduce file weight without adding another complicated workflow.
The best audit is the one that leads to a completed task. Pick one tool, check the pages that matter most, fix the highest-impact issue first and make your next visit to the report count.