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SEO audit tools spot problems you can fix to improve your performance in search engines and AI platforms.
But the right tool depends less on which one is most powerful and more on the type of audit you need to run.
I tested 10 SEO audit tools, from broad platforms like Site Audit and SE Ranking to specialist crawlers like Screaming Frog and Netpeak Spider, to find which one fits each kind of audit you might run.
The "Best for" column in the table below maps each tool to one of four audit types (technical, on-page, crawl and indexing, AI search health), which we explain in detail in the next section.
Tool
Best for
Free version available
Starting paid price
Site size fit
Site Audit
Technical and AI search health audits
Yes, 100-page free allowance
$139.95/month
Small to enterprise
On Page SEO Checker
On-page audits
Yes, limited page analyses
$139.95/month
Small to enterprise
Google Search Console
Crawl and indexing insights from Google
Yes
Free
Small to enterprise
Screaming Frog SEO Spider
Advanced crawl and indexing audits
Yes, up to 500 URLs
$279/year
Medium to enterprise
SE Ranking
Technical audits with progress tracking
14-day trial
$129/month
Small to medium
Morningscore
Beginner-friendly technical audits
14-day trial
$69/month
Small to medium
SEO Pro Extension
Quick on-page checks
Yes
Free
Small
Netpeak Spider
Focused crawl audits of specific URLs
3-day trial
$20/month
Small to medium
Conductor Monitoring
24/7 technical and crawl monitoring
Free trial
Custom pricing
Enterprise
Sitebulb
Technical and crawl audits for teams
14-day trial
$18/month
Small to enterprise
Most teams use the wrong SEO audit tool because they choose based on overall features instead of the audit problem they need to solve.
An SEO audit is not one single task. It usually includes four different types of checks:
The problem is that one tool rarely handles every type of audit equally well.
For example, a tool built for broad site monitoring may not give you the depth you need for crawl analysis.
Or a specialist crawler may not help much with page-level content recommendations.
AI search health is the newest of the four audit categories, and dedicated AI search checks are still uncommon.
Site Audit is one of the few tools with AI Search checks built in. Those checks flag issues that can affect how AI platforms crawl and interpret your pages.
So I evaluated each tool based on the audit type it handles best. The best SEO audit tool isn’t simply the most powerful one. It’s the tool that matches the audit you need to run.
To choose an SEO audit tool, start with the type of audit you need to run, then narrow your options by site size, monitoring needs, and team setup.
Use this table as a starting point:
If you need to audit…
Look for…
Technical and on-page issues
An all-in-one SEO platform that can crawl your site, prioritize issues, and give page-level recommendations
Crawl and indexing issues
A specialist crawler or log analysis tool with deeper control over crawl settings, rendering, and URL analysis
AI search health
A tool with dedicated AI visibility checks, such as whether AI platforms can access key pages
Quick page-level checks
A browser extension or lightweight free tool
Then use these secondary filters to narrow your choice:
Below, I’ll walk through the 10 SEO audit tools I tested and explain which audit job each one handles best.
Best for: Technical and AI search health audits in a single workflow.
Semrush’s SEO checker, Site Audit, crawls your website to find technical SEO issues, prioritizes those issues, and provides actionable fixes.
Site Audit also includes dedicated AI Search checks. These checks flag issues that can make pages harder for AI platforms to access or understand, such as blocked AI crawlers or pages that need content optimization.
This combination makes Site Audit useful when your audit needs to cover technical site health and AI search visibility in one place.
I set up the project using the default crawl settings and scheduled weekly audits to keep tracking site health over time.
Site Audit scanned 100 pages and finished in about three minutes.
The “Overview” report provides a quick snapshot of your site’s overall health across search engines and AI platforms.
It organizes issues into three categories (errors, warnings, and notices) and shows a clear Site Health score you can track over time.
The Site Performance section helped me see page speed data for all 100 pages at once. Instead of testing URLs one by one in Google’s PageSpeed Insights, I could instantly spot slower pages and prioritize fixes across the site.
I also found the "Crawled Pages" tab especially useful. The “Site Structure” view showed how easily crawlers could navigate the site’s hierarchy, making it simple to identify areas that might need stronger internal linking.
But the “Issues” tab is where I recommend you spend most of your time. It lists problems by type and shows the affected pages.
You can also filter issues specifically for “AI Search,” which highlights issues that could affect your AI search visibility.
AI search health is different from a standard technical audit. A page can be indexed by Google but still have issues that make it harder for AI platforms to access or understand.
Site Audit’s AI Search checks help you spot those issues without running a separate workflow.
The audit flagged several pages on my test site that needed content optimization.
Site Audit also allows you to schedule recurring audits and export reports as PDFs, which is useful if you're delivering findings to a team or client.
Use Site Audit when you need a technical SEO audit tool with broad site coverage and AI search checks in one workflow, especially if you’re not sure which audit type to prioritize yet.
It's the most flexible starting point because it covers two of the four audit jobs (technical and AI search) and integrates with the rest of the Semrush platform if you also need on-page or content audits later.
You can crawl up to 100 pages per month with a free Semrush account, no credit card required.
Paid plans include:
Best for: On-page audits with competitor benchmarking.
Semrush’s On Page SEO Checker compares your pages with top-ranking competitors and gives page-level ideas for improving content, keyword targeting, and on-page SEO.
I used the auto-import option, which pulled 50 pages from my site that were already ranking but just outside the top 10.
You can also add URLs manually if you want to focus on key pages like blog posts or service pages that drive conversions.
The tool took around three minutes to analyze everything and surfaced 92 actionable ideas across strategy, content, backlinks, semantics, and SERP features.
What stood out most was how the tool prioritized each page based on potential traffic gain and impact. That helped me decide where to start.
I also like that I can drill down into a single area. For example, the “Semantic” section suggests related phrases that my competitors are using. Adding those phrases could improve topical depth and visibility in organic search.
The "Top 10 Benchmarking" tab shows how my pages compare to the current top results for things like content length, backlinks, and readability. It gives me quick clues about what competitors are doing better.
Use On Page SEO Checker when your audit goal is to improve on-page performance for existing pages, especially pages ranking just outside the top 10.
It’s not a tool for finding technical errors or crawl issues. It's for tightening on-page optimization based on what top-ranking competitors are doing better.
The free Semrush plan covers one campaign with up to 10 keyword-page pairs, no credit card required.
Paid plans include:
Best for: Crawl and indexing audits using Google’s own data.
Google Search Console (GSC) helps you understand how Google views and indexes your website, so you can track performance, identify crawlability issues, and spot pages that need attention.
This section reflects how I regularly use GSC on client projects, since the example site for this review wasn't verified.
To use GSC, you need to verify that you own the site. You can usually do this with DNS verification, an HTML file upload, or an HTML tag. Once verification is complete, performance and indexing data may still take a few days to appear.
One feature I use most often is URL inspection. It quickly shows whether a page is indexed, when it was last crawled, and if a noindex directive is keeping it out of search results. That’s usually where I start when a key page suddenly sees a performance dip.
The “Page indexing” report is another go-to for me. It breaks down all your URLs by indexing status and shows why some pages might not appear in Google search.
For example, I often find “Crawled – currently not indexed” URLs in the “Page indexing” report. And that helps me prioritize pages that need swift attention.
To troubleshoot site performance, I use the “Core Web Vitals” reports (there’s one for desktop and one for mobile). They group pages by how strong their metrics like Largest Contentful Paint (LCP) and Cumulative Layout Shift (CLS) are.
In some cases, the “Core Web Vitals” reports make patterns easy to spot. For example, you might see that all product pages have unusually high LCP.
Further reading: 15 Crawlability Problems & How to Fix Them
Use Google Search Console when you need to understand how Google is crawling, indexing, and reporting on your site.
It’s especially useful when you need to check whether an important page is indexed, find pages excluded from Google Search, or troubleshoot Core Web Vitals issues using Google’s own reports.
It’s not a full replacement for a crawler or an on-page audit tool. GSC shows what Google reports about your site, but it doesn’t crawl your site with the same level of control as a specialist crawler or provide competitor-based page recommendations.
Google Search Console is free.
Best for: Advanced crawl and indexing audits with detailed technical control.
Screaming Frog SEO Spider is a desktop crawler that finds technical SEO issues and provides detailed reports, which makes it ideal for audits that need more control than a standard site health check.
I downloaded the free version of Screaming Frog SEO Spider and crawled 500 URLs (the free limit) on the test site. This took four minutes.
The main dashboard gave me a lot of crawl data in one view. It lists every URL alongside information like status code, content type, page title, and meta description, so it’s easy to spot certain issues right away.
The “Issues” tab lists problems in order of severity. That’s where I spent most of my time during the audit, since it helped me decide which fixes to tackle first.
The Screaming Frog crawl flagged missing canonicals (HTML elements that indicate the main version of a page), duplicate H1s, and placeholder text that needed updating.
Another useful feature is Screaming Frog's direct AI integration. You can connect crawl data to OpenAI, Gemini, Anthropic, or Ollama via Config > API Access > AI, then run custom prompts against crawled pages to generate alt text, summarize content, classify pages by intent, or detect semantic similarity across URLs.
This is a different feature set from dedicated AI search audits (which check whether AI platforms can access and parse your site), but it's useful for content-heavy audits at scale.
Use Screaming Frog SEO Spider when you need a deep crawl audit and want more control over what gets crawled, extracted, filtered, and analyzed.
It’s a strong fit for technical SEO work, migration checks, redirect audits, internal linking reviews, and large crawl exports. It’s less useful if you mainly want a simple site health score or page-level content recommendations.
The free version crawls up to 500 URLs and includes most core audit functions.
The paid plan is $279/year and removes crawl limits and adds advanced features like saving and comparing crawls, integrations with tools like Google Analytics, and scheduled crawls.
Best for: Technical audits with progress tracking.
SE Ranking’s Website Audit crawls your site to detect technical SEO issues and provides a health score with category-based recommendations for improvement.
I used the 14-day free trial to test Website Audit, and the tool scanned more than 200 pages in under a minute. It gave my site a score of 85, with 980 issues detected.
What sets SE Ranking apart is how it quantifies progress. Each issue type contributes to your total Health Score, so you can instantly see how much a specific fix may improve your score.
In my test, fixing all meta tag issues would have raised my score by six points.
The “Crawl Comparison” feature was another highlight for me. It compares two audits side by side, so you can see which issues were fixed, which issues appeared, and how your Health Score changed.
This is useful for ongoing maintenance because you can confirm whether your fixes reduced actual audit issues over time.
SE Ranking also includes other features common in paid SEO audit tools, such as the ability to set crawl limits, scan specific pages, and review internal linking.
Use SE Ranking when you want a technical audit tool that makes progress easy to measure over time.
It’s a strong fit if you care about health scores, issue categories, and before-and-after crawl comparisons. This makes it especially useful for regular maintenance, client reporting, or tracking whether technical fixes improved site health.
SE Ranking is available through a free 14-day trial with no credit card required.
Paid plans include:
Best for: Beginner-friendly technical audits with guided tasks.
Morningscore crawls your site and gamifies the process by turning your results into guided “missions” you can complete.
I started a 14-day free trial of Morningscore and ran a crawl on my test site. The audit took about a minute and categorized issues into three main tabs.
The "missions" system is where Morningscore stands out. The tool sets goal-based tasks (like improving a target keyword's ranking to a certain position) to turn your audit results into smaller, more actionable steps.
You can also set up your own custom missions based on your audit results to focus on the specific pages or metrics you care about.
Morningscore also includes a “Condition” meter that shows how severe an issue is and how much it affects your overall score. The visual clarity helps you focus on what matters most.
For some fixes, Morningscore includes a "Fix with AI" option. In the image below, this feature allows you to generate a better meta description.
Use Morningscore when you want a beginner-friendly audit tool that turns SEO issues into clear tasks.
It’s a good fit if you want help deciding what to fix next and prefer a guided workflow over dense crawl data. It’s less ideal if you need deep crawl configuration, log file analysis, or highly technical exports.
Morningscore offers a free 14-day trial, no credit card required.
Paid plans include:
Best for: Quick on-page SEO checks.
SEO Pro Extension is a free Chrome and Firefox extension that displays on-page SEO data when you activate it on any webpage.
I installed the Chrome version and tested it on several pages. It worked instantly, with no login or setup required.
The “Overview” tab displays basic details about the title tag, meta description, canonical URL, and word count.
A standout feature: SEO Pro Extension shows Core Web Vitals data pulled from Google's Chrome User Experience Report (CrUX). CrUX is Google’s public dataset of real user experience data, so this can help you see how a page performs for actual Chrome users.
The “Links” tab shows how each page connects to others across the site, which is helpful for spotting pages you should link to more frequently.
The "Images" tab is also useful for seeing which images are missing alt text. While many audit tools offer this feature, it’s nice that SEO Pro Extension allows you to quickly do this for specific, high-priority pages.
SEO Pro Extension requires you to visit each page manually, so it isn’t practical for auditing a large website from start to finish.
Use SEO Pro Extension when you need to spot-check a single page or a small batch of important pages, like a new landing page before launch or a key blog post that just dropped in rankings.
It’s not a substitute for a full audit tool. I’d use it alongside a crawler or site audit platform when I need a quick page-level check.
The SEO Pro Extension is free.
Best for: Focused crawl audits of specific URLs or site sections.
Netpeak Spider is a desktop crawler that gives you full control over the URLs you audit, so you can focus on the technical checks that matter most.
I downloaded Netpeak Spider and started a free three-day trial.
Unlike most SEO audit tools, Netpeak Spider doesn’t automatically begin from your homepage. You add the exact URLs you want to analyze. The flexible configuration means you can choose which checks to run, focus on specific URL groups, or skip areas that don’t need review.
You can also save your audit settings as templates, which makes follow-up audits on the same site much faster.
I chose 173 URLs from my test site’s sitemap. The scan took seconds and flagged issues across all 173 pages.
The “URL Explorer” view within Netpeak Spider listed every page along with status codes, issue counts, and response times, which can help with quickly spotting errors.
In my test, all URLs returned a “403 Forbidden” response. This usually means the website blocked the crawler from accessing the pages. If that happens, check whether the site blocks certain bots or whether your crawler’s user-agent settings need adjusting before treating the URLs as broken.
Use Netpeak Spider when you need to run repeated audits on the same site and want to lock in custom settings as templates.
It's also a good fit when you're auditing specific URL groups (like a single product category) rather than the full site, because it doesn't force a homepage-down crawl.
Netpeak Spider offers a three-day free trial, which requires a credit card.
Paid plans include:
Best for: 24/7 technical and crawl monitoring.
Conductor Monitoring (formerly ContentKing) is a real-time SEO monitoring platform that keeps watch over your site for changes and new problems, so you don’t need to run manual crawls.
I used a free trial of Conductor Monitoring to process roughly 200 pages in about a minute. After that, the system monitored the site automatically in the background.
You can set up custom alerts for specific conditions like when a link breaks. And when an alert is triggered, Conductor Monitoring sends notifications via email, Slack, or Microsoft Teams. So, you can fix problems immediately.
Each page gets an "Importance" score from 0 to 10 that rates authority based on factors like how many internal links point to it, how deep it sits within your site, and how often its content changes. That helps you identify the most important pages to work on first.
Use Conductor Monitoring when you need always-on monitoring instead of one-off audits.
It’s a good fit for large sites, enterprise teams, and websites where small technical changes can affect revenue-generating pages quickly. For example, an ecommerce site may need instant alerts if product pages, category pages, or checkout-related links break.
It’s probably more than you need if your site has a limited number of pages and you only need a scheduled audit once a week or month.
Conductor Monitoring offers a free trial. The length appears to vary by signup method: I received seven days without a credit card, while Conductor's documentation references a 14-day trial.
Paid Conductor plans are custom-priced based on your requirements.
Best for: Technical and crawl audits with team-friendly reporting.
Sitebulb is a website crawler (available in desktop and cloud versions) that audits sites for technical SEO issues and organizes results by severity and impact.
I downloaded the desktop app and used the default configuration for my first project. Setup took about five minutes, and the crawl took another two minutes.
When the results loaded, Sitebulb displayed two different scores: the “Audit Score” covers all issues, while the “SEO Score” focuses only on SEO-related factors.
Each SEO area also has its own score in Sitebulb. So, I was able to prioritize issues in areas that scored lowest.
There are also “Hints” that explain the issues and how to fix them.
I used “Audit Notes” while exploring reports to add short comments that appear directly in the Audit Overview. It’s an easy way to record what you change and when directly in Sitebulb. Or leave context for teammates working on the same project.
Use Sitebulb when more than one person needs to work from the same audit, especially in agency settings where you’re handing findings to developers, writers, or clients.
It’s also a strong fit when your audit needs clear explanations, issue context, and notes that help developers, writers, clients, or other SEO teammates understand what to fix next.
Sitebulb offers a free 14-day trial for the desktop version, and no credit card is required.
Paid desktop plans include:
There’s also a cloud version of Sitebulb available for users who want to run audits automatically or collaborate with a team. Plans start at $125/month.
Best for: Log file analysis on enterprise sites with 100,000+ pages.
I wasn't able to test JetOctopus directly because trial access requires a sales call. I'm including it as an honorable mention because no other tool in this list specializes in log file analysis the way JetOctopus does, and it's a common choice for enterprise teams running large-site audits.
Based on JetOctopus's documentation, the platform combines crawl data with log file data, so you can compare the pages on your site with the pages bots actually visit. Its log analyzer tracks multiple bots, including Googlebot, Bingbot, GPTBot, ClaudeBot, and PerplexityBot.
This helps enterprise teams see whether bots are reaching important product, category, or content pages, or spending time on filtered URLs, redirects, and error pages, which is especially useful after a site migration or major site change.
Use JetOctopus when you're running log file analysis on a large enterprise site, especially after a migration or major architecture change, and you need to verify how search and AI crawlers are actually moving through your site.
It's not a fit for small or medium sites or for teams that need a quick site health check.
Pricing is available on request through a sales conversation with JetOctopus.
ree SEO audit tools work well for specific audit jobs, while paid tools are better for larger sites, recurring audits, team workflows, and newer checks like AI search health.
The difference depends on your audit type:
The simplest approach is to start with the tool that fits your primary audit type, then upgrade when you hit a real limit, such as page volume, monitoring frequency, team workflow, or missing AI search checks.
You should run a full SEO audit at least once every quarter, and check high-priority issues weekly if your site changes often.
For ecommerce sites, publishers, and large websites, scheduled or continuous audits make more sense because new pages, redirects, templates, and internal links can create issues quickly.
Yes, you can use multiple SEO audit tools together because different tools are better at different audit jobs.
For example, you might use Google Search Console to check indexing, Site Audit to find technical and AI search issues, and a specialist crawler for deeper crawl analysis.
SEO audit tools check for AI search visibility by reviewing whether AI platforms can access, parse, and use your important pages.
Dedicated AI search checks may look for blocked AI user agents, such as ChatGPT-User, PerplexityBot, ClaudeBot, and Google-Extended. They may also check whether key pages return crawlable status codes, whether important content appears in crawlable HTML, and whether structured data gives AI systems clearer page context.
This feature is still new, so look for a tool with dedicated AI search checks if AI visibility is part of your audit.
A good SEO audit tool should include the checks needed for your audit type and clear guidance on what to fix first.
It should show which pages are affected, how serious each issue is, and what you should do to fix it.
If you manage a larger site, the tool should also support scheduled crawls, progress tracking, report exports, and integrations with data sources like Google Search Console.
Yes, free SEO audit tools are accurate enough for many small sites if you only need basic technical, on-page, and indexing checks.
The main limitation is usually capacity, not data quality. You may need a paid tool when you hit crawl limits, need scheduled monitoring, want competitor-based recommendations, or need dedicated AI search checks.
The right SEO audit tool depends on what you need to check first.
If you need broad technical coverage, issue prioritization, scheduled audits, and AI Search checks in one workflow, start with Site Audit. It's one of the few tools in this list with AI search health audits as a named feature.
If your audit centers on bot behavior, Semrush also offers a separate Log File Analyzer that tracks both Googlebot and AI crawlers.
If you need deeper crawl analysis or indexing checks, a specialist crawler like Screaming Frog may be a better fit.
Start with the audit type that fits your current problem. Then choose the tool built for that type of audit.
Zach Paruch
Zach Paruch is a data-driven SEO strategist with 10+ years of experience driving organic growth through smart, scalable search strategies. His expertise includes on-page and technical SEO, AI search optimization, and content strategy—with a special focus on ideating and implementing AI-driven processes. By leveraging in-depth search intent analysis, refined information architecture, and user-centered design, Zach consistently delivers high-impact content that drives business outcomes.
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