65+ SEO Audit Tools

Updated: February 24, 2023.

The list of 65+ SEO audit tools for both more and less advanced SEOs. 

Here is the almost complete list of SEO audit tools. It took me a lot of time to compile this list but it’s finally here. These are the tools that every SEO site auditor should be aware of.

Of course, it’s not necessary to use all of these tools with each SEO audit you perform because there is a huge overlap between many of them (especially crawlers).

However, your awareness of these tools can indeed move your SEO auditing to a new level and let you become even a better SEO than you are right now. 

❗Make sure to check my list of example technical SEO issues if you audit websites and my list of SEO tips.

Google SEO tools are essential tools for practically any SEO audit type. Google offers so many SEO tools that I have compiled a separate list of 50 SEO tools from Google only. The must-have SEO tools from Google include, among others, Google Search Console (GSC), Google Analytics (GA), Google PageSpeed Insights, Lighthouse, Chrome DevTools, and more. View my list for more details and links to these tools.

Type: FREE & web-based
Link: Google SEO Tools 

There are also literally hundreds of great SEO Chrome extensions that can help you a lot in performing an SEO audit. I have also compiled the list of 79 SEO extensions for Chrome and I invite you to check it to find the plugins that will facilitate your SEO auditing process. I am sharing a few Chrome extensions that may be super useful for performing a site audit further in this list. View my full list of Chrome extensions for more. 

Type: FREE
Link: Chrome SEO Extensions

Chrome Web Developer is a tool for website developers but SEOs can also extract a lot of useful SEO information from it. For example, the tool lets you disable JavaScript on a page to check whether the site is functional without JS.

Type: FREE & browser extension
Link: Web Developer 

Semrush Site Audit is by far one of my favorite web-based crawlers.  Semrush Site Audit analyzes hundreds of technical SEO elements, such as crawlability, HTTPS, international SEO, Core Web Vitals, site performance, internal linking, and more.

Similar to Sitebulb, Semrush Site Audit provides explanations of each issue it detects, which makes it a great tool for less advanced SEO auditors. 

Type: PAID (free trial) & web-based
Link: Semrush Site Audit

Screaming Frog is probably the most popular SEO auditing tool out there. This site crawler is highly flexible and powerful, capable of crawling both very large and very small websites and allowing real-time result assessment.

With Screaming Frog SEO Spider, you can identify broken links, perform metadata and page title analysis, pinpoint duplicate content, review robots directives, render JS, check hreflangs, and much more.

Type: FREE (up to 500 URLs) & desktop-based
Link: Screaming Frog SEO Spider

Although Sitebulb is seen primarily as a website crawler, it can do a lot more. Not only can it perform an audit of your website and offer practical recommendations, but it does all of this while keeping you tranced with enchanting visualizations.

In contrast to Screaming Frog SEO Spider, Sitebulb provides explanations of all issues and further reading links, which makes it good for both less and more advanced SEO site auditors.  

Type: PAID & desktop-based
Link: Sitebulb (you can get a 60-day extended trial of Sitebulb as a visitor of SEOSLY)

JetOctopus offers crawling and SaaS log analyzing features for enterprise SEO. The tool can intersect a crawl report data with Google Search Console and log insights.

The report generated by JetOctopus presents the most important SEO opportunities, shows insights from the GSC data (keywords), and identifies technical SEO errors (indexation, JS, duplication, etc.).  In my opinion, this is one of the best web-based crawlers. 

Type: PAID (7-day free trial) & web-based
Link: JetOctopus 

With Serpstat Site Audit, you can perform a website SEO audit that is complete and comprehensive. The problems are divided into three categories on the basis of priority (low, medium, and high).

You can also use Serpstat’s SDO score to determine your site optimization level. Furthermore, you can benefit from practical recommendations and explanations provided for each SEO element analyzed. 

Type: PAID (free trial) & web-based
Link: Serpstat

Bing may not be the best search engine in the world but it has an array of awesome technical SEO tools. One of these tools is Bing Site Scan which can crawl your website and assess it for some of the most frequent technical SEO problems.

The Site Scan tool looks a bit similar to other well-known website crawlers like Screaming Frog SEO Spider or Sitebulb. You can scan the entire site, just its sitemap, or a list of URLs. There are also advanced settings, such as scan depth, crawling speed, or the possibility to ignore robots.txt. 

Type: FREE
Link: Bing Site Scan

Considered by many to be the leading platform related to technical SEO, DeepCrawl is a web-based crawler that offers in-depth technical SEO insights and analytics. DeepCrawl can segment data for priority identification and boasts a flexible API that allows you to use data as and when required. DeepCrawl is a huge player in enterprise SEO. 

Type: PAID
Link: DeepCrawl

OnCrawl SEO Crawler is a cloud-based SEO crawler that allows you to analyze over 300 million URLs per crawl. The tool contains more than 500 charts and 1200 data points that will let you dive really deep into the site’s technical SEO health. One thing I especially like about OnCrawl is that it offers complete crawl customization, such as JS crawling, virtual robots.txt, DNS override, staging websites, and more. 

Type: PAID (14-day free trial) & web-based
Link: OnCrawl

WooRank Site Crawl is a web-based site crawler that has been designed specifically for identifying crawl issues that might be tripping up search engines, such as status codes and on-page SEO.  It also offers practical ways to tackle these issues and shows you quick SEO wins.

Type: PAID (14-day free trial)
Link:  WooRank Site Crawl

Greenflare is an open-source, free, and lightweight SEO web crawler designed specifically for Windows, Mac, and Linux. Alongside being cross-platform, Greenflare requires low hardware and is highly scalable (having been tested against websites having over 4M URLs). You can access reports on elements related to on-page SEO, sort and filter crawl data, identify any damaged internal links, and perform a host of other functions. 

Type: FREE
Link: Greenflare

Netpeak Spider is a desktop-based crawler for SEO auditing. With Netpeak Spider, you can perform regular assessments of the on-page SEO of your website. The tool checks and analyzes more than 100 potential SEO issues, such as broken links, duplicate content, H1, and more. There is also the option of site scraping, web data extractions, and advanced data segmentation. 

Type: Freemium 
Link: Netpeak Spider 

Ahrefs Site Audit will crawl every page that it spots on your site, and then come up with an overall score of SEO health. In addition, the tool will visualize all the essential data in the charts, flag every possible SEO problem, and offer possible solutions for those. With

Ahrefs Site Audit, you can check your website for problems related to performance, HTML tags, social tags, content quality, localization, incoming and outgoing links, resources, and external pages. 

Type: PAID (7-day trial for 7 dollars) & web-based
Link: Ahrefs Site Audit

The Moz Site Crawl, another web-based crawl, can quickly crawl large sites and track every new and recurring issue that occurs over time. Through interactive charts, you can assess the categories of issues, pinpoint new issues, and know the total number of issues. This way, you will be able to identify trends with ease, grasp new opportunities, and obtain precious information on your website’s general SEO performance. 

Type: PAID (30-day trial) & web-based
Link: Moz Site Crawl

A robust tool and website crawler, SEOMATOR has been designed for SEO auditing and website analysis. Designed by SEM/SEO professionals, the tool is primarily aimed at analyzing website structure (internal links, broken links, etc.), structured data, site content, and technical SEO (redirects, canonicals, response codes, etc.).  You can use SEOMATOR for a quick glance at regions that require specific attention during an SEO audit. 

Type: PAID (free trial)
Link: SEOMATOR

BEAMUsUp is a free desktop-based crawler that has been discontinued but it still works and can be used. BEAMUsUP lets you perform the sorting, segmentation, and filtration of exported data extracted from website crawls and presents the most frequent SEO issues. This crawler has no limits regarding the number of pages it can crawl. I am sharing it mostly for educational purposes as it has been discontinued. 

Type: FREE (discontinued)
Link: BeamUsUp 

The Raven Website Auditor will classify every SEO issue into one of the six visibility issues (meta issues, content issues, link issues, semantic issues, and mobile and desktop page speed), making it easy for you to identify the type of errors most prevalent on the website. With Raven, you will not only receive an easy-to-understand problem list but you will also get an actionable checklist of suggestions. 

Type: PAID (free trial)
Link: Raven Site Auditor 

Alexa Site Audit Tool is another powerful web-based crawler that is supposed to help you find technical SEO issues. The tool checks for issues, such as on-page SEO (word count, title tags), crawl errors (broken links, resources blocked by robots.txt), speed analysis, and security issues (insecure meta tags and forms). The tool helps you prioritize the issues and offers step-by-step instructions on how to fix the issues detected. 

Type: PAID (free trial) & web-based
Link: Alexa Site Audit Tool

The Cognitive Site Audit Tool is another web-based crawler that performs a full technical SEO site analysis and highlights any issues and errors. The tool analyzes different areas of technical SEO, such as indexability, architecture, mobile, and performance. It also provides hints on how to fix the issues detected and helps you prioritize them. 

Type: PAID (free trial)
Link: Cognitive Site Audit Tool

Zadro Web SEO Auditor provides a range of features, including domain and page authority for all links, Google PageSpeed Insights scores, a list of ten best keywords as perceived by Semrush, numerous technical aspects (including robots.txt and sitemap.xml files),  image and metadata checking, analysis of the presence of social links on a website, and more.  

Type: FREE & web-based
Link: Zadro Web SEO Auditor 

ContentKing SEO Auditing is a cloud platform that is enterprise-grade and designed for Real-Time Content Change Monitoring and SEO Auditing. The uniqueness of ContentKing lies in the fact that it lets webmasters fix any issues before they have had the chance to impair SEO rankings. Thanks to its practical insights, it is immensely easy to optimize every area and aspect of your website. 

Type: Paid (extended free trial for users of SEOSLY) & web-based
Link: ContentKing SEO Auditing

With this SEO analysis and audit tool, you can perform a quick SEO analysis of any page. The tool checks things, such as HTTP Headers, meta tags, keywords relevancy, the SERP snippet of the page, URLs found on the page, headings, keywords in ALT texts, and more. The tool analyzes one single page (it does not perform the full crawl of the site) and extracts easy-to-digest data. 

Type: FREE & web-based
Link: SEO Workers SEO Analysis Tool 

This web app lets you check out any webpage without the distractions that come with styles. In addition, it will highlight any section of a page that might be related to SEO. BROWSEO works by focusing entirely on HTML, much like what a search engine robot will view when it visits a page. It allows you to not only determine the structure of a page but also how relevant it is to particular search terms. 

Type: FREE & web-based
Link: BROWSEO

With Bing Site Explorer, you can take a look at your website through the eyes of Bing. The uniqueness is about the manner of data presentation. Every website page is classified into a folder and sub-folder which portray the structure of a site. Every folder will contain pertinent crawl information derived through recent crawls, along with a count of backlinks, impressions, and clicks.  

Type: FREE
Link: Bing Site Explorer

This wide range of tools helps you with SEO learning, obtaining personalized rewrites and redirects, understanding the potential causes behind your website’s loss of traffic, hreflang generation, and the basics of PWAMP and its functioning. The founder, Aleyda Solis, who runs an SEO consultancy called Orainti, is well known for being an expert in international SEO. 

Type: FREE & web-based
Link: SEO Tools by Aleyda Solis 

The combo of technical SEO and content that is produced from in-depth audience insights means that Merkle Technical SEO Tools are one of the best free technical SEO tools throughout the industry. These tools include, among others, robots.txt tester, .htaccess tester, sitemap generator, RSS feed parser, fetch & render, pre-rendering tester, hreflang tag tester, and more. 

Type: FREE & web-based
Link: Merkle Technical SEO Tools 

The Internet Marketing Ninjas SEO Tools is a comprehensive collection of SEO tools aimed at helping you analyze and improve probably every area of SEO and internet marketing. The tools include, among others, a site crawl tool, image & link analyzer, on-page optimization tool, side-by-site SEO comparison tool, robots.txt generator, and more. 

Type: FREE & web-based
Link: Internet Marketing Ninjas SEO Tools

The SEO toolset from Ryte is considered one of the best when it comes to on-page optimization and it’s free.  Ryte Free SEO Tools include, among others, Structured Data Helper, Ryte Topic Explorer, Website Checker, robots.txt generator, Text Uniqueness Tool, Google Snipper Optimizer, and robots.txt tool. 

Type: FREE & web-based
Link: Ryte FREE SEO Tools 

This very useful tool functions as an Excel add-on and has numerous features that can help users perform deep SEO analysis with data belonging to other sources, without ever having to move away from Excel. The tool uses a “connector” for extracting data from these third-party sources. These features make it a highly useful tool for off-page and on-page SEO analysis.

Type: FREE
Links: SEO Tools for Excel 

Ahrefs Webmaster Tools is a free tool from Ahrefs that will monitor your site’s SEO health (and scan your site for 100+ common SEO issues) and provide you with advice on fixing these issues. The tool also gives you data on the backlinks and the keywords that bring the site the majority of traffic. You can use the tool only if you connect it to your Google Search Console data. 

Type: FREE (but requires assess to the GSC data)
Link: Ahrefs Webmaster Tools

The Log File Analyzer from Semrush is an SEO tool that can analyze access logs and then produce a report detailing the way Googlebot performs crawling on a website. With this information, SEOs can keep track of technical issues and implement crawl budget optimization. 

The biggest advantage that you get with this tool is the quickness of access log reading. Within a brief span of time, you can understand Google’s interaction with your or your clients’ sites. There is no need to torment yourself by doing it in Excel. 

Type: PAID (free trial) & web-based
Link: Semrush 

Much like the Semrush tool discussed above, the SEO Log File Analyzer from Screaming Frog helps you understand the precise manner in which crawlers like Googlebot interact with a website. All you need to do is upload log files, and the tool will let you verify search engine bots, identify crawled URLs, and analyze search bot behavior and data. 

Type: FREE and PAID & desktop-based
Link: SEO Log File Analyzer 

OnCrawl Log Analyzer walks an extra mile during your SEO audits and helps you map your URLs into calculated segments and groups. Through groups of multiple pages, you can understand the way in which you are spending your crawl budget. With this analyzer, you get unlimited processing of data, fresh rank, live monitoring of logs, powerful segmentation, and much more.

Type: PAID (14-day free trial)
Link: OnCrawl SEO Log Analyzer 

JetOctopus Log Analyzer claims to be the most affordable log analyzer on the market. The tool is very easy to use, and contains a lot of pre-set issue reports, live logs stream, 2-click integration, and more. There is also no limit on the number of log lines. JetOctopus Log Analyzer allows you to identify crawl budget waste, group pages by the number of visits by bots, identify fake bots, and much more

Type: PAID (free trial)
Link: JetOctopus Log Analyzer  

SEOLYZER an SEO tool that is useful and intuitive at any level of experience. You can perform the analysis of the collection of log files either through an upload or in real-time. Not only is the crawler quick, but the reports it produces are easy-to-understand and extensive (you can use the columns tab to access additional information). 

Type: FREE (with limits) & web-based
Link: SEOLYZER 

JavaScript Rendering Check lets you assess URLs for any differences between the rendered HTML and the original code. The tool checks only one single URL. It does not perform a full crawl and comparison. To do that, you can use Screaming Frog or Sitebulb crawl with JS rendering. 

Type: FREE & web-based
Link: JavaScript Rendering Check

Chrome Dev Tools is a bunch of web development tools that have been integrated directly into the Chrome browser. With these tools, users can not only view the DOM but also manipulate or change it. In addition, you can alter the style of a page through the preview environment option, use JavaScript to view messages, debug, and process the code within the console. The tool also lets you analyze the site’s performance and lab values of web vitals. 

To open Chrome DevTools, simply right-click anywhere on the page in Chrome and select “Inspect”. 

Type: FREE & built into Chrome
Link: Chrome Dev Tools 

With Detailed SEO Extension, all you need to do is press a button to receive the basic SEO insights about the website that you are currently browsing. The tool has been primarily designed for day-to-day analysis and allows you to pull back the meta description, title tag, meta robots tag, headings, and a lot more information for any website that you need.

Type: FREE & Chrome extension
Link: Detailed SEO Extension

The SEO Indexability Check Chrome extension has been designed by DeepCrawl, and allows you to view the indexability status for any page that you want, through intuitive color codes. Moreover, when you open the extension, you will be able to see the complete details of the robot directives and the response codes which produced the status. 

Type: FREE & Chrome extension
Link: SEO Indexability Check

SEOquake, a free browser plugin from Semrush, can deliver organic search information within a click. The tool is compatible with major browsers, such as Google Chrome, Opera, and Mozilla Firefox. It provides on-page SEO information in a flash, examines internal and external links, compares domains and URLs in real-time, and allows you to export data.

Type: FREE & browser extension
Link: SEOquake

Another free Chrome extension, MozBar enables you to obtain link metrics for both domains and pages during your search and lets you view Page Authority, Domain Authority, and the backlink number for the website as you continue to search. 

Type: FREE & browser extension
Link: MozBar

Majestic SEO is an invaluable tool for analyzing backlinks which often are an important part of an SEO audit. It measures and presents backlink metrics, such as Trust Flow and Citation Flow. It also shows the number of external backlinks, referring domains, referring IPS, and more. 

Type: FREE and PAID & web-based
Link: Majestic

As the name suggests, Check My Links is a link checker – it crawls all over your webpage and tries to identify any broken links. The tool then highlights every link that is working fine and every link that is impaired in some way – all of these bad links can then be copied to the clipboard. 

Type: FREE & Chrome extension
Link: Check My Links

With Alt Text Tester, you can check the Alternate Text of any image on the site by simply hovering over it. Moreover, when you double-click on the image, the tool will also copy the text for you. 

Type: FREE & Chrome extension
Link: Alt Text Tester

You can use this tool to find out the technology that has been used to build any website. All you need to do to receive this information is click on the Builtwith icon. Knowing the technology, plugins, or frameworks which are used on the site is extremely useful when providing SEO recommendations.

Type: FREE & Chrome extension
Link: BuiltWith Technology Profiler

With Link Redirect Trace, you can analyze any redirect and learn whether it is friendly in terms of SEO. The tool will also let you identify redirect chains and JS redirects. This is an indispensable tool for SEO auditors who want to trace redirects on a per-page basis.   

Type: FREE & Chrome extension
Link: Link Redirect Trace

The View Rendered Source Chrome Extension is incredibly lightweight and lets you see how the browser has rendered the original HTML of a page into a functional DOM, alongside any JavaScript modifications. The tool highlights all the differences between the rendered and raw versions and shows the way in which JavaScript performed page modification during the time of render.

Type: FREE & Chrome extension
Link: View Rendered Source

Thanks to Link Miner, you can elevate the process of analyzing (broken) links. The tool provides you with social and link data for any page link, allows you to export every link from any page, and even places the link data side-by-side with the page link itself. In addition, Link Miner be used for knowing the number of external or total links that are present on the page you are currently viewing. 

Type: FREE & Chrome extension
Link: Link Miner

It comes as little surprise that Google uses its users’ locations to produce results that are most relevant. However, if you are unwilling to let Google use your present location, you can use Google Location Changer to continue your Google Search – only this time, it will seem as if you are performing the search from a location different from your actual one. 

Type: PAID (14-day free trial)
Link: Google Location Changer 

As the name suggests, this tool is designed to check if the XML sitemap formation is accurate. In addition, this tool will sometimes ping Google in order to let it know about the location of your sitemap. You will be instantly informed if there are any problems with the sitemap, thereby enabling you to make any required changes before the sitemap is submitted to Google. 

Type: FREE
Link: XML Sitemap Validator  

This free service lets you ensure that web documents are valid. This validator is capable of processing documents produced in almost every markup language, such as HTML, XHTML, SMIL, MathML, and SVG. It can also validate a document written using XML DTD or SGML, as long as the right kind of document type declaration has been used. 

Type: FREE
Link: W3C Markup Validator 

This tool checks either your website as a whole, or specific pages and, within minutes, produces a report about any broken links that it might have identified. You do not need to install or run any extra program files in order to generate these reports.

Type: FREE & web-based
Link: Online Broken Link Checker

HEADMasterSEO is a desktop-based tool that lets you check URLs in bulk to analyze status codes, redirects, response time, response headers, HTTP header fields (X-Robots-Tag, etc.). The tool lets you analyze, filter, and sort results. There is also the option to export to CSV. 

Type: FREE (up to 500 URLs) & desktop-based
Link: HEADMasterSEO 

URL Profiler is a desktop-based tool that lets you audit links, content, and social data. The tool can perform, among others, a domain analysis (and retrieve data like social shares, Whois information, Wayback Machine, Ahrefs DA, etc.), URL analysis (HTTP statuses, robots access, etc.), and content analysis (readability, content uniqueness, etc.). 

Type: PAID (14-day free trial)
Link: URL Profiler 

Siteliner is a free-of-cost tool that lets you check the site for things like duplicate content, average page size, average page load time, word count, internal links per page, total links per page, inbound links per page, and external links per page. The tool also shows you how your site compares to other sites scanned by it. 

Type: FREE & web-based
Link: Siteliner 

SEOptimer is a tool designed for website auditing and reporting and can perform a comprehensive review of any website in less than 30 seconds. The tool checks and reports on things like on-page SEO elements, top keyword rankings (top 10 keywords in a specific location), usability performance, social media, and the technologies used on the site. 

Type: FREE with PAID options & web-based
Link: SEOptimer 

SEO Site Checkup can perform a brisk website audit that will show you the list of issues to be fixed together with their priority and explanations. Some of the things that the tool checks include the size of HTML, the use of CDN, JS errors, and more. 

Type: PAID (14-day free trial) & web-based
Link: SEO Site Checkup

Everyone who has been in the SEO industry for 8-10 years probably knows this tool very well. Xenu’s Link Sleuth is a desktop-based tool that lets you analyze websites and identify any broken links. It analyzes every URL, image, background, frame, and local image map, style sheet, script, and java applet. I am sharing this tool mostly for educational purposes for SEO geeks out there!

Type: FREE & desktop-based
Link: Xenu’s Link Sleuth 

Panguin is a free-of-cost SEO tool designed to see if Google algorithm updates have impacted your website in any way. You can select your preferred updates from a complete list, and you can then go through the complete timeline of those specific updates. 

Type: FREE & web-based
Link: Panguin Tool 

The Website Penalty Indicator can help you determine whether a site might have been penalized by Google. All you need to do is enter the domain and the tool will show you the timeline of Google updates overlaid the visibility of the site (the data from Semrush). 

Type: FREE & web-based
Link: Website Penalty Indicator 

To put it simply, Algoroo is a tracking tool for Google algorithms and can be used for the tracking of any kind of Google algorithm update. The tool also shows you weekly winners and losers. There is a customizable timeline on which specific updates are marked together with SERP fluctuations recorded on specific days. 

Type: FREE & web-based
Link: Algoroo 

Like Algoroo, Semrush Sensor has been designed to track and monitor Google SERP volatility on the basis of daily ranking changes, and identify any indications of Google algorithm updates. The tool lets you analyze SERP volatility in different categories, including in desktop/mobile. You can also view winners and losers and analyze SERP features occurrence (e.g. featured snippets, local pack, etc.). 

Type: FREE & web-based
Link: Semrush Sensor 

Mozcast is another tool designed with the objective of tracking “weather” patterns and trends in the Google algorithm over the previous day and the 90-day history. The tool also reports on the Google SERP features, such as HTTP results, knowledge graph, local packs, related questions, etc. 

Type: FREE & web-based
Link: Mozcast

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Here are the SEO auditing guides you will like:

• How to audit a site with Google Search Console
• How to audit a site with Sitebulb
• How to audit a site with JetOctopus
• How to find new keyword opportunities using Ahrefs
• 7 ways to use Ahrefs Webmaster Tools
• 40+ best SEO podcasts