Best SEO audit tools in 2026
An SEO audit tool scans your website the way a search engine would and gives you a list of problems to fix: broken links, missing titles, duplicate content, slow pages, redirect chains and crawl errors. Some are free one-page checkers, others crawl millions of URLs and track issues over time.
- search.google.com Free
Google Search Console: Google's own data on how your site performs in search
Search Console shows the queries people use to find your site, your clicks, impressions and average position, plus indexing problems, Core Web Vitals and manual actions. Every website should have it set up.
- seobility.net Freemium
Seobility: Easy online site audit with a useful free plan
Seobility crawls your site and scores it on technical issues, on-page structure and content. The free plan is enough for a small website, which makes it a good first audit tool.
- seoptimer.com Freemium
SEOptimer: Instant one-page SEO audit with white-label reports
SEOptimer audits a page in seconds and gives a graded report on on-page SEO, usability, performance and social signals. Agencies use its embeddable audit tool to generate leads.
- siteliner.com Freemium
Siteliner: Find duplicate content and broken links across your site
Siteliner, from the makers of Copyscape, scans your website for internal duplicate content, broken links and page power. It is a quick way to find thin or repeated pages.
- bing.com Free
Bing Webmaster Tools: Microsoft's free search console, with a site scan and keyword tool
Bing Webmaster Tools reports how your site performs in Bing and gives you a free site scan, keyword research and backlink data. It can import your sites from Google Search Console in a few clicks.
- ahrefs.com Free
Ahrefs Webmaster Tools: Free site audit and backlink data from Ahrefs for sites you own
Ahrefs Webmaster Tools gives you Ahrefs' Site Audit and Site Explorer for websites you can verify. It is one of the best free ways to run a full technical audit and see your backlinks.
- ahrefs.com Paid
Ahrefs: All-in-one SEO suite best known for its huge backlink index
Ahrefs combines a backlink database, keyword research, site audits, rank tracking and content research. It is one of the two most widely used SEO suites, and its link data is a common reference point in the industry.
- semrush.com Freemium
Semrush: The broadest SEO and marketing suite, from keywords to PPC and social
Semrush covers SEO, paid search, content marketing, local listings and competitive research in one platform. Its keyword database and Site Audit tool are especially popular, and it adds marketing features most SEO-only tools do not have.
- seranking.com Free trial
SE Ranking: Affordable all-in-one suite with accurate rank tracking
SE Ranking started as a rank tracker and grew into a full suite with audits, keyword research, backlinks and white-label reporting. It is a popular lower-cost alternative to the biggest suites, especially for agencies and freelancers.
- screamingfrog.co.uk Freemium
Screaming Frog SEO Spider: The industry-standard desktop crawler for technical SEO audits
Screaming Frog crawls a website from your computer and reports on status codes, titles, meta tags, canonicals, redirects, structured data and much more. It is flexible enough for almost any technical audit and integrates with Google Analytics, Search Console and PageSpeed Insights.
- moz.com Free trial
Moz Pro: Long-standing SEO suite and the home of Domain Authority
Moz Pro offers keyword research, link analysis, site crawls and rank tracking. Moz created the Domain Authority metric, which is still widely used to compare websites, and its learning resources are some of the best in SEO.
- serpstat.com Free trial
Serpstat: Budget-friendly SEO platform with keywords, audits and tracking
Serpstat provides keyword research, competitor analysis, site audits, rank tracking and backlink data at a lower price point than the market leaders.
- neilpatel.com Freemium
Ubersuggest: Beginner keyword and audit tool from Neil Patel
Ubersuggest offers keyword ideas, content ideas, a basic site audit and rank tracking. It is aimed at beginners and small businesses who want simple SEO data without the price of a full suite.
- sitebulb.com Free trial
Sitebulb: Crawler that turns technical data into prioritised, explained hints
Sitebulb crawls your site and presents the results as prioritised hints with explanations, charts and visual site maps. It is easier to read than raw crawl data, which makes it popular for client-facing audits.
- jetoctopus.com Free trial
JetOctopus: Fast cloud crawler with log file analysis
JetOctopus is a cloud crawler built for large sites. It combines crawl data with server log analysis and Search Console data to show how search engine bots actually move through a website.
- lumar.io Paid
Lumar: Enterprise website intelligence platform (formerly Deepcrawl)
Lumar, formerly Deepcrawl, is an enterprise crawler and monitoring platform. It is designed for very large websites and teams that want to catch technical SEO issues before releases go live.
- developer.chrome.com Free
Lighthouse: Open-source audit for performance, accessibility and SEO basics
Lighthouse runs inside Chrome DevTools or from the command line and scores a page on performance, accessibility, best practices and basic SEO. Developers can run it in CI to catch regressions.