Alexis Kestler
Getting your website to rank high in search engine results pages (SERPs) can be challenging. With so many factors that Google and other search engines consider when determining rankings, it can be difficult to know where to start optimizing your site.
This is where SEO analysis tools come in handy. These online tools can crawl your site, identify issues holding your rankings back, and provide actionable recommendations for improving your SEO.
In this comprehensive guide, we‘ll highlight 18 of the best free and paid SEO analysis tools to help take your website‘s search performance to the next level.
1. Ahrefs Site Audit
Ahrefs is one of the most powerful SEO tools on the market. Beyond backlink analysis and keyword research, Ahrefs offers a robust site audit tool.
Simply enter your URL, and Ahrefs will crawl your entire site to identify on-page issues, technical problems, and areas for SEO optimization.
Key things the Ahrefs site audit checks for:
- Indexability issues like robots.txt blocks, meta noindex tags, or canonical problems
- Duplicate content
- Slow page speed
- Broken links and images
- Missing alt text on images
- Accessibility issues
- Invalid structured data
- Lack of internal linking
- Thin content
One of the best features of Ahrefs Site Audit is the crawler. It can analyze up to 500 URLs for free users, which provides great insight into the overall health of a website.
The audit summary clearly displays your site‘s SEO score, along with the number of errors, warnings, and notices. You can then drill into each section to understand the specific problems and solutions.
While Ahrefs is a paid tool, you can get a 7-day trial to test out the site audit feature.
2. SEMrush Site Audit
Similar to Ahrefs, SEMrush is an all-in-one digital marketing toolkit with powerful SEO site audit capabilities.
After entering a domain, SEMrush crawls the site and provides an SEO score from 1-100. You‘ll see key issues grouped into categories like crawlability, on-page content, technical SEO, backlinks, authority, and more.
Here are some of the elements the SEMrush site audit checks:
- Indexation issues
- Duplicate content
- Page speed optimizations
- Meta tag problems
- Image SEO
- Internal linking
- Structured data
- Rich snippets
- Traffic sources
- Backlink profile
Like Ahrefs, one of the best parts of SEMrush is the detailed crawl report. The site audit can spider up to 500 pages for free users, giving you a comprehensive analysis of your site‘s overall SEO health.
SEMrush also makes it easy to export the site audit results, so you can share findings with clients and team members. They offer a free 7-day trial, so you can test it out risk-free.
3. Moz Site Crawl
Moz offers one of the most accurate site crawlers in the SEO software space. The detailed crawl report identifies issues that may be holding your rankings back.
After adding your URL, Mozbot will crawl your site and provide an in-depth analysis, including:
- Indexation problems like crawl errors or blocked resources
- Duplicate content issues
- Broken pages and links
- Slow page speed insights
- HTML tag problems
- Image SEO optimizations
- Internal linking opportunities
- Traffic sources
Moz provides both an overview of high-level SEO issues, as well as deep technical details on each URLs crawlability. You can also easily export the CSV data for further analysis.
One limitation is that Moz‘s site crawler is limited to 25 URLs for free users. Their paid plans unlock additional URLs and features.
4. Seobility Site Audit
Seobility is an enterprise-level SEO platform that offers one of the most comprehensive site audits available.
After entering your URL, Seobility crawls your site and checks for over 100 potential on-page and technical SEO issues. Their audit examines elements like:
- Indexability and crawl errors
- Duplicate content
- Page speed optimizations
- ON-page content SEO
- Meta and title tag optimization
- Link juice flow
- Internal linking
- Image SEO
- Structured data and schema markup
Seobility‘s audit provides extensive details on each issue, as well as actionable recommendations to improve your on-page SEO.
Their crawler can analyze up to 500 URLs for free, giving you a detailed evaluation of issues across your entire site. Seobility also offers a free SEO toolbar and rank tracker.
5. Screaming Frog SEO Spider
Screaming Frog is one of the most popular SEO crawlers in the industry. Their SEO Spider tool crawls your site to identify potential on-site optimizations.
After adding a domain, Screaming Frog will spider your site and generate a detailed list of all pages and assets crawled. Their analysis checks elements like:
- Indexability issues
- Duplicate content
- Page titles and meta descriptions
- Image SEO
- Structured data markup
- Crawl errors
- Redirect chains
A key benefit of Screaming Frog is flexibility. You can customize the crawl settings to analyze up to 500 URLs for free. Their paid plans remove limits and add features like site maps and bulk analysis.
Screaming Frog provides extensive filtering to dive into specific SEO issues. You can also integrate Google Analytics data for additional insights.
6. DeepCrawl Site Auditor
DeepCrawl offers one of the most advanced site audit and SEO crawler tools available.
Their powerful crawler provides comprehensive technical, on-page, and off-page SEO analysis, including checks for:
- Indexing issues
- Duplicate content
- Page speed optimizations
- ON-page SEO factors
- Link equity flow
- Structured data
- Redirect chains
- Traffic sources
- Backlink profile
A key advantage of DeepCrawl is flexibility. You can customize crawl settings like pages per minute, crawl depth, and more. Their SEO crawler can analyze up to 25,000 pages based on your subscription plan.
DeepCrawl‘s filters and bulk editing capabilities make it easy to prioritize issues and optimize sites at scale. They also provide an SEO forecast with month-by-month predictions.
7. Botify Site Audit
Botify offers a powerful enterprise SEO crawler to identify technical problems impacting your search visibility.
Their intelligent crawler analyzes on-page content, internal linking, indexability issues, page speed, structured data, and more. Key elements the Botify site audit examines include:
- Crawl accessibility
- Indexing errors
- Duplicate content
- Page speed optimizations
- ON-page content SEO factors
- Internal link equity distribution
- Image SEO
A key benefit of Botify is scale. Their crawler can analyze millions of URLs to provide actionable insights into the SEO health of large websites.
Botify‘s custom analytics enable you to segment issues by URL, page type, directories, and more. The audit also integrates crawl data from Google Search Console for additional context.
8. Sitebulb Site Auditor
Sitebulb offers one of the most user-friendly SEO site audit tools. Their crawler provides automated audits to identify critical issues impacting performance.
Key elements the Sitebulb site audit examines include:
- Indexability problems
- Duplicate content
- Page speed metrics
- ON-page optimizations
- HTML tag issues
- Image SEO factors
- Internal link equity flow
Sitebulb presents audit results visually, with tabs to drill into each category. Their "Quick Wins" feature lets you sort issues based on ease of implementation.
For larger websites, Sitebulb‘s crawler can analyze up to 500 URLs for free and 1 million pages with paid plans. You can also integrate Google Search Console data for additional context.
9. Ryte Site Audit
Ryte offers a free website audit tool that crawls your site to identify critical SEO problems.
Their automated analysis checks elements like:
- Indexability issues
- Duplicate content
- Page speed metrics
- Meta tag optimization
- Link equity distribution
- Image SEO factors
A key benefit of Ryte‘s free site audit is transparency. They provide clear explanations and guides for fixing identified issues.
Ryte‘s crawler can analyze a limited number of pages for free. They offer paid plans that check unlimited URLs and provide weekly monitoring to track SEO progress over time.
10. SEO Site Checkup
SEO Site Checkup offers a free website audit tool covering all aspects of on-page SEO and technical performance.
Their automated crawler provides actionable recommendations to optimize:
- Indexing directives
- Duplicate content
- Page load speed
- ON-page content
- Internal linking
- Structured data
SEO Site Checkup presents audit results in an easy-to-understand dashboard highlighting issues to fix. Each section has detailed explanations and guides for proper optimization.
For websites with under 500 pages, SEO Site Checkup‘s free audit provides immense value. They also allow you to append Google Analytics for additional insights.
11. SEO Review Tools
SEO Review Tools is a powerful free analysis tool to audit technical SEO problems.
It crawls your site to identify issues like:
- Indexability and canonical errors
- Duplicate pages
- Broken links and images
- Improper redirects
- Missing meta tags
- Slow page speed
SEO Review Tools provides page-level details highlighting problems that need to be fixed. You can also download PDF reports to share findings.
For in-depth analysis, SEO Review Tools integrates with the premium version of SEO PowerSuite. This unlocks additional audits for content, links, and rankings.
12. SEOquake Site Auditor
SEOquake offers a free website auditor browser extension. With a single click, it crawls your site to analyze:
- Indexability directives
- Duplicate page problems
- Broken links
- Page speed metrics
- Meta tag optimizations
- Structured data markup
SEOquake‘s site auditor integrates seamlessly into Chrome and Firefox to make SEO analysis easy. The dashboard summarizes key issues and actionable fixes.
While the free extension is limited in scope, SEOquake integrates with premium tools like LinkAssistant for full site audits and monitoring. This makes it easy to scale analysis across large websites.
13. WooRank
WooRank offers one of the most user-friendly free website audit tools. Their automated SEO checker analyzes key elements like:
- Indexability directives
- Duplicate content
- Broken links
- Page speed metrics
- ON-page optimization opportunities
- Structured data markup
WooRank presents audit results on a simple dashboard highlighting high-priority issues and quick wins. Their reports include clear, actionable recommendations for optimizing your site‘s SEO.
For more advanced analysis, WooRank integrates with premium tools like LinkResearchTools and Ahrefs to provide expanded keyword and backlink data.
14. WebCEO
WebCEO is an SEO crawler that audits your site for technical issues and optimizations. Their automated analysis checks elements like:
- Indexing directives
- Duplicate content
- Broken links and images
- Page speed metrics
- Meta tags
- Structured data
WebCeo generates visual reports to highlight high-priority issues and quick wins for improving site SEO. They also allow you to compare audits week-over-week to showcase SEO progress.
While designed for smaller websites, WebCEO can crawl up to 1,000 pages for free. Their paid plans also add rich keyword research and rank tracking capabilities.
15. SEO Audit by Cognitive SEO
Cognitive SEO offers a free website analysis tool focused on identifying issues that impact organic rankings.
Their SEO auditor checks elements like:
- Indexability signals
- Duplicate content
- Slow page speed
- Meta tag optimizations
- Internal link equity flow
- Image alt text
The audit results highlight the most pressing SEO issues to address first. You can also run weekly scans to monitor optimization progress over time.
For in-depth analysis, the free tool connects with Cognitive SEO‘s premium SEO services, including technical audits, content optimization, and link building.
16. SEO Reviewer
SEO Reviewer offers a simple SEO audit tool to analyze on-page and technical site health.
Their automated crawler checks for issues related to:
- Indexability signals
- Duplicate content
- Page load speeds
- Meta tag optimization
- Internal linking
- Image SEO
SEO Reviewer presents audit results in an easy-to-digest dashboard. You can also generate PDF reports to share findings across teams and clients.
The free tool is geared for smaller websites of up to 100 pages. For larger sites, SEO Reviewer integrates with premium SEO services for expanded capabilities.
17. Sitechecker SEO Audit
Sitechecker provides a user-friendly SEO site audit tool for in-depth analysis.
After adding your URL, Sitechecker crawls your site and highlights opportunities to improve:
- Indexing signals
- Duplicate content
- Page speed metrics
- ON-page SEO factors
- Internal link equity
- Image optimization
Sitechecker‘s audit simplifies identifying high-impact SEO fixes through color-coded severity ratings. You can also track optimization progress over time.
While Sitechecker‘s free audit analyzes a limited number of pages, their paid plans include many additional capabilities like rank tracking, site maps, and API integrations.
18. SEOptimer
SEOptimer offers a comprehensive website auditor and crawler for in-depth SEO analysis.
Their automated audit examines elements like:
- Indexability signals
- Duplicate content issues
- Broken links and images
- Page speed metrics
- ON-page optimization opportunities
- Internal link equity distribution
SEOptimer provides clear guided fixes and recommendations based on audit results. You can also integrate analytics for additional insights.
Their free auditor connects with premium SEO PowerSuite tools for expanded keyword research, rank tracking, and site audits.
Pick the Right SEO Audit Tool for Your Needs
Completing regular SEO site audits is crucial for identifying issues that may be hurting your search visibility. This enables you to optimize your on-page content, page speed, technical performance, and more.
The SEO analysis tools highlighted in this guide make it easy to perform comprehensive audits identifying areas for improvement.
Here are some key factors to consider when choosing the right website auditor for your needs:
- Crawl depth – How many URLs can be analyzed? Is there a crawl limit?
- Issue tracking – Can you compare audit reports over time to showcase SEO progress?
- Customization – Can crawl settings be customized for more advanced audits?
- Reporting – Does the tool generate shareable SEO reports and visualizations?
- Support – Is training, coaching, or professional services available?
- Price – Are there budget-friendly packages for small sites? What about enterprise-level site audits?
Look for an SEO site audit tool that provides comprehensive analysis of all on-page and technical elements that impact organic rankings. Tracking audit reports over time can help demonstrate the business value of your SEO initiatives.
Pairing automated site crawlers with professional audits gives you the best of both worlds. This enables holistic insights to strengthen your overall SEO strategy.
With these tips and tools, you have everything needed to perform regular SEO health checks. Start optimizing your site for higher rankings and more organic traffic today!
