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15 Best SEO Audit Tools For 2023 (Free & Paid)

May 19, 2023
Irina Maltseva

Admit it, no matter how skilled you are in search engine optimization, turning to SEO audit tools is a must.

It's clear that Google's algorithm is becoming intricate. Gone are the days when it was easy to rank for a keyword of any difficulty; Google now considers 20+ factors in its ranking system. 

The situation is even more dynamic. Google adjusts its search algorithm over 3,000 times yearly. This averages about nine alterations daily.

Keeping track of all these changes is a daunting task for most SEO specialists. That's why the best choice is to rely on specialized SEO audit tools to do the hard work. They examine web pages and identify SEO problems that hinder website performance.

With that in mind, I'd like to guide you through 15 top SEO audit tools for 2023. I've crafted this extensive list through hours of research and testing. 

I've included advanced and basic options and paid and free SEO audit tools to cater to everyone's needs. 


SE Ranking: It is the top choice of the masses. This SEO auditor boasts a full arsenal of SEO tools, including technical and content audits.

Semrush: The best comprehensive SEO solution with site and content audit tool.

Sitechecker: Ideal for actionable checklists.

Nightwatch: Best tool for addressing website stagnation, rankings, and keywords.

Woorank: SEO audit tool generates PDF reports with improvement suggestions on user engagement and conversions. 

Best SEO audit tools for 2023

1. SE Ranking

se ranking

SE Ranking is the best choice for a complete SEO audit tool. It boasts a highly efficient page crawler. Se Ranking can scan hundreds of pages in a matter of minutes.

You can conduct a comprehensive website audit with this tool. It includes on-page assessments like page speed and indexing. It also has off-page evaluations, such as backlink profile analysis. 

SE Ranking's on-page SEO checker and content editor optimize your site's content. The content editor is particularly effective for optimizing new content.

Additionally, this comprehensive SEO tool offers multiple features, such as keyword rank tracking and competitor analysis.

Key SEO audit features

  • Analyzes content SEO-friendliness and keyword optimization
  • Analyzes internal links
  • Checks page loading speeds
  • Finds technical SEO errors 
  • Generates sitemap.xml with one click
  • Identifies common words and phrases on a page
  • Offers tips for resolving SEO issues
  • Reveals missing or duplicate meta tags
  • Reviews index status
  • Scans images
  • Helps to optimize the website’s speed


Easy setup

Includes white label feature

Cost-effective compared to alternatives

Discount on rank check frequency across all plans


An overwhelming amount of features may confuse beginners

Keyword rank tracking limited on each plan

Pricing: SE Ranking provides three pricing options, ranging from $49 to $239 per month. You can get a 20% discount with annual plans. SE Rankings offers a 14-day trial if you want to test the software before purchasing it.

2. Semrush

semrush seo audit tool

SEMrush is a widely trusted and robust all-in-one search engine marketing software. It is renowned for its technical SEO auditing abilities. The platform’s site audit tool can accurately assess over 130 technical and on-page SEO factors.

Semrush's audit feature provides you with all essentials to enhance your website's SEO, including:

  • In-depth page speed analysis
  • Comprehensive crawlability analysis
  • Meta tag optimization recommendations
  • Analysis of your internal linking structure

The reports by Semrush will provide specific insights on how to improve your site's ranking. It is tailored to your target audience and their search behavior. The audit results will also highlight link-building opportunities for further improvement.

This digital marketing giant also presents itself with more than 40 cutting-edge intelligence tools, including:

  • Competitor analysis 
  • Content optimization 
  • Keyword research  
  • Paid ad research  
  • Rank tracking 
  • Social media monitoring


  • Audit over 130 on-page, off-page, and technical SEO metrics
  • Create personalized white-label PDF reports
  • Schedule and tailor your audits
  • Focus on the most pressing issues for immediate resolution
  • Track daily website performance using the Daily Performance Tracker
  • Uncover neglected link-building prospects
  • Access in-depth audit reports on markup, security, internal linking, and more


Comprehensive feature set

Enormous databases

Helps to optimize the website's on-page SEO

Improves website's crawlability and architecture

Helps to ensure proper implementation of AMP

Provides dedicated reports on HTTPS-related issues


Inconsistent accuracy of traffic analytics data

The interface may be complicated for the beginners

Pricing:  Monthly plans start from $119.95/month with an annual billing cycle. A free trial is available for those who choose monthly billing.

3. Sitechecker

seo audit sitechecker

Sitechecker is a cloud-based crawler that uncovers the technical SEO hiccups that hinder your website's success. You can conduct a full technical SEO audit with the in-platform audit tool.  

Websites containing up to 300 pages can be scanned on average within 120 seconds.

The platform provides step-by-step optimization guidance for your website's SEO.  Sitechecker evaluates your search performance daily. The platform then adjusts your task list according to changes in your website's content, rankings, or backlinks.

The platform goes a step further by generating reports and notifications automatically. It ensures you are up-to-date with the changes that impact your website's SEO.

Sitechecker also offers various other SEO features, including: 

  • Rank tracking 
  • Site monitoring 
  • Backlink tracking


  • SiteChecker provides a real-time website SEO monitoring
  • Audits offer an overall site score and detailed analysis of site-level and page-level issues
  • Daily website performance monitoring
  • Extensive how-to guides for fixing site issues
  • Sitechecker’s backlink builder alerts you in case of lost links
  • Researches the history of specific events or pages


Intuitive and user-friendly platform

Centralized platform for tracking keywords, backlinks, and monitoring site health

Time-saving SEO Chrome extension

White-label reports suitable for marketing agencies


Overwhelming amount of information provided in the audits

Subscription plans have a limited number of sites per account


Subscription plans include:

  • Basic: $49/month
  • Standard: $149/month
  • Premium: $249/month

SiteChecker also offers a 7-day complimentary trial.

4. Nightwatch

Nightwatch seo audit

Nightwatch is an excellent cloud-based rank-tracking tool. It offers accurate and current data on your website's SEO performance and includes such tools as keyword analysis, backlink analysis, and website audits.

Nightwatch's reputation rests on its rank tracker. It delivers accurate SERP rankings from over 100,000 locations globally. The platform's site audit tools deliver great results when paired with a rank tracker.

With Nightwatch, you can compare Local Packs and Organic Rankings side-by-side. The platform can create highly customized and frequent reports. You can also deliver this report to each unique client in their preferred format.

You can quickly create white-labeled reports with its drag-and-drop interface. In addition, you can save additional time by automating the delivery of these reports to your team.

The platform can easily inspect your website for broken pages, missing tags, and links. You can also establish automated crawling to monitor recurring and new issues. 

Key features

  • Integration with Google Analytics and GSC to improve reporting
  • Keyword discovery tool
  • On-page SEO audit with prioritized URL reports
  • Automated white-label SEO reports
  • Detection of small and major website issues
  • Handy audit results filtering
  • Compares historical audits


Exceptional user interface

Easy-to-understand client reporting

Quick prioritization of optimizations

14-day free trial


Backlink tools are not accessible during the free trial period

Pricing: Paid plans start at $39 per month. The platform also provides a 14-day free trial to test the software.

5. WooRank

woorank seo audit

WooRank is a comprehensive SEO site auditing tool. With WooRank, you can arrange automated web crawls to detect problems when adding new content and pages to your website.

You can use the platform's contextual helpers to gain further insight into your crawl results. It will help in saving your time and development expenses.

With its full website analysis capability, you can generate custom reports for your website. This feature lets you share insights with clients, colleagues, or your executive team.

WooRank offers tailored recommendations for all webpages. It provides critical information and practical suggestions for resolving website issues. A prioritized section indicates problems that should be addressed first for maximum impact.

In addition, WooRank provides a handy Chrome extension.  It helps to instantly analyze websites for SEO, mobile and mobile issues. This extension is completely free.


  • Site crawling
  • Website health and uptime monitoring
  • Keyword tracking
  • Competitive analysis
  • Sales tools


Comprehensive site analysis

Easy to scan reports

Great customer service


The steep learning curve for SEO beginners

Limited to one user access unless opting for the Enterprise plan

The free trial version is quite limited

Pricing: The plan starts from $79.99. The website also offers a 14-day trial to test the software.

6. Surfer

surfer seo audit

Surfer is a content auditing tool. It is designed to enhance your content optimization for higher rankings. This tool is ideal if you aim to optimize your on-page SEO. 

I recommend using it in combination with any of the technical SEO tools mentioned above. 

Surfer detects gaps in your content and locates missing keywords. It also determines the optimal text length based on SERP outcomes, meta tags, and headings.

Additionally, Surfer can audit and refurbish your existing content. The tool unveils the absent keywords and phrases from your content. It then assigns a score based on your content quality.


  • Automated internal linking suggestions
  • Comparison of keyword density, content length, and headings with top-ranking results
  • Detection of broken links in your content
  • Customization of audit reports for clients
  • Repurposing of old content to align with current trends



Precise data for informed decision-making

Ideal for SEO content writing

The streamlined content writing process

Exceptional support through chat and a comprehensive knowledgebase


It does not cover technical off-page SEO audits 

Limited credits with the basic plan

Pricing: Pricing begins at $59 monthly for paid plans. No free trial is available.

7. Netpeak Spider

Netpeak Spider seo audit

Netpeak Spider is an all-in-one SEO audit tool. It is ideal for individuals with intermediate to advanced SEO knowledge. This tool is a perfect choice if you're looking to delve into deeper SEO problems.

Netpeak Spider helps to identify critical optimization issues hindering your website's performance. It discovers opportunities for organic traffic growth and automatically generates optimization reports.

The platform also lets you crawl and examine multiple domains. This helps in evaluating your competitors' websites. You can learn from their successful strategies and apply those insights to your site.

The data segmentation features in Netpeak Spider are beneficial for crawling big websites. The audit results are organized into segments. It allows you to concentrate on specific areas of interest.

Netpeak Spider's in-tool website scraper can gather information from websites utilizing up to 100 criteria and four distinct search techniques.

With the pro plan, you can simultaneously crawl multiple domains.


  • Automatic white-label SEO audits
  • Site scraping and web data extraction
  • XML sitemap generator
  • Internal page rank checker
  • Multi-domain crawling
  • Receive a report with various technical issues (404 errors, broken links, etc.)
  • Analyze page load time and server response time, and extract metrics from Google Page Speed Insights
  • Evaluate various metrics from external services such as Serpstat and Similarweb for individual pages


Great speed and amount of data it can process

Comprehensive and very customizable dashboard

Easy to make PDF reports


Only a desktop software version is offered; there is no online version available

Available only for Windows 7 and later devices

Lack of one graph and JSON-LD scraper

Pricing: Subscription plans start at a low cost of just $7 per month.

8. Seomator

Seomator seo audit

Seomator is a comprehensive online SEO audit tool that allows you to analyze your website's performance. It crawls your site and generates detailed white-label SEO reports in a PDF format. The reports highlight any problems with your on-page and off-page SEO. Seomator also provides scores and recommendations for improvement.

The tool facilitates the evaluation of the quality of your website's content. It provides insights on duplicate, unique, similar, or thin content. Seomator can effortlessly identify content that requires optimization or removal. 

With Seomator, you can easily run SEO audits, track your rankings, do keyword research, and check your backlinks profile.


  • Page speed optimization
  • On-page SEO audits
  • Technical audits 
  • Integration with a Search Console
  • Rank tracking
  • SERP cached result history
  • Backlinks explorer
  • Keyword research
  • Verifies optimized presence of HTML metatags for website content


Competitive pricing compared to other similar tools

User-friendly interface

Great SEO audit reports


No log data analysis

Reports are not highly customizable

Scanning the site takes a bit of time

Pricing: The price starts at $49/mo per 1 project, 1 user, and 1,000 results per report. You can test the tool for 7 days for free. 

9. ContentKing

contentking audit

ContentKing is the only platform that offers real-time SEO auditing and monitoring. The platform grants you complete situational awareness which enables you to enhance and sustain your organic search visibility. 

The platform continuously keeps track of your website. It notifies you of any on-page problems and changes as they occur. As a result, it allows you to take prompt action before your rankings are affected.

ContentKing provides 24/7 monitoring and alerting that helps you to access the most current data on your SEO performance. This eliminates the need to wait for crawl completion.

The tool operates on a cloud-based system that eliminates the need for installations. This system ensures that your data and reports are always readily accessible.



Personalized, real-time SEO alert

Immediate notifications of any content or technical SEO problems

One-click away support team

Easy to configure different types of notifications to my email


The platform does not provide rank and link tracking

Sometimes it takes a while to detect any change on the website

Pricing: Contact the sales team for pricing information.

10. JetOctopus

JetOctopus seo audit tool

JetOctopus is a cost-effective and quick technical SEO audit tool. It features a robust SaaS crawler and logs analyzer with unlimited usage capabilities.

This auditing tool is designed for experienced SEOs and offers advanced features. It has a steeper learning curve compared to other tools. So it may not be the best option for beginners. However, it is a superb choice if you want access to advanced capabilities.

JetOctopus boasts exceptional crawling speed. It can process any page volume without affecting your PC's performance.

The platform allows easy integration with Google Search Console. 


  • Log analyzer
  • Google Search Console data for SEO insights
  • JavaScript SEO issues audit
  • SEO issues alerts
  • E-commerce SEO


User-friendly interface

A helpful tool for advanced technical SEO audits

Fast crawler

One of the most affordable enterprise crawlers on the market so far


Sometimes reports provide fake issues signals

Crawler has limitations and doesn’t crawl any page

Pricing: JetOctopus has a flexible pricing model based on page volume, starting at $171 monthly.

11. Screaming Frog

screaming frog seo audit

Screaming Frog is renowned in the industry for its innovative SEO spider tool. The platform offers a robust and flexible website crawler. It is optimized to efficiently navigate through websites of all sizes and get instant analysis of results. 

With just a click, you can instantly scour a website for broken links (404s) and server errors. It can easily export the identified issues and corresponding source URLs in bulk to your dev team. 

With Screaming Frog, you can conduct an in-depth analysis of page titles and meta descriptions as part of a comprehensive crawl. The platform allows you to schedule and automate website crawls at chosen intervals. 


  • Effortlessly scan page titles and metadata 
  • Identify duplicate content 
  • Extract site information  
  • Create XML sitemaps 
  • Find both temporary and permanent redirects
  • Identify slow-loading pages with high load times for optimization
  • Data can be extracted from any HTML page using CSS Path, XPath, and regex.


Deep technical audits

No quota for URLs or domains you crawl if you buy a license

Impressive crawling speed

Reports are easy to read, download, and share


It can be too technical for beginners

The user interface is a bit dated

The free version has a limited amount of features

Pricing: Take advantage of numerous features for analyzing up to 500 URLs at no cost. Unlock even more advanced features for unlimited URLs with a yearly subscription starting at $259.00.

12. MOZ

moz site crawl overview

Moz is a popular tool that provides a range of SEO features such as keyword research, site audits, backlink analysis, rank tracking, and on-page optimization tools that help website owners and marketers improve their search engine visibility and increase their online presence. 

Additionally, Moz empowers users to identify and resolve common technical SEO issues that could negatively affect their website's traffic, ranking, and indexing potential. 

The crawl identifies typical issues like: 

  • Broken redirects 
  • Errors in title and header tags 
  • Indexing problems


  • Track keyword rankings and competition
  • Identify harmful issues on your webpage with Moz's website crawler and receive alerts to fix them fast
  • Audit content on your pages and get specific recommendations to improve page optimization
  • Find new links and maximize the effectiveness of existing ones
  • Create customized reports and schedule recurring reports to save time


Offers a broad selection of free SEO tools

Moz provides detailed metrics that help to evaluate website performance

Easy to make a crawl and detect small and big SEO issues

Powerful filters that allow filtering pages and status codes


The paid plans may be costly for smaller marketing teams

It doesn’t provide reasons why websites rankings are dropping

Pricing: The paid plans begin at $99 monthly and come with a 30-day free plan.

Top 3 best free SEO audit tools

13. Ahrefs Webmaster Tools

Ahrefs Webmaster Tools

Ahrefs Webmaster Tools is a free site audit tool that provides a comprehensive overview of a website's health and performance.

One of the most useful features of Ahrefs Webmaster Tools is the site audit tool. This tool scans your website and identifies any technical SEO issues that could be negatively affecting your search engine rankings. Whether it's broken links, missing alt tags, or slow page load times, the site audit tool helps you identify these issues and provides recommendations on how to fix them.

Another powerful feature is the backlink analysis tool which helps you monitor your website's backlink profile, identify toxic backlinks, and discover new link-building opportunities. 

Ahrefs Webmaster Tools also includes a rank tracking tool that allows you to monitor your website's search engine rankings for targeted keywords. 

Finally, it provides a search traffic analysis tool that helps you understand your website's organic search traffic. 


  • Check top issues 
  • Site explorer 
  • Backlinks audit
  • Identify on-page SEO issues such as 404 pages, broken links, and slow-loading pages to improve performance.
  • Determine the organic keyword rankings of your website 
  • Provides reports for duplicate content, link opportunities, and performance



Free to use

Detailed backlinks analysis

Powerful filters that allow filtering pages and status codes


No access to Ahrefs full suite of tools in free version

Pricing: It's a free audit tool.

14. PageSpeed Insights

pagespeed insights seo audit

Google's PageSpeed Insights is a tool that assesses a webpage's loading speed and performance on both mobile and desktop devices. Based on the results, the tool offers specific recommendations for improvement.

The tool uses a variety of metrics to evaluate a website, including load time, time to first byte, the size of the page, the number of requests made, and more. The results are presented in a score out of 100, with a higher score indicating a faster and more optimized website.

Google Page Speed Insights is used by web developers, SEO specialists, and website owners to optimize their websites for better performance and user experience. By identifying and addressing performance issues, websites can load faster, rank higher in search results, and provide a better user experience for visitors.


  • Provides recommendations for improving page loading speed
  • Measures important metrics such as a time to interactive, first contentful paint, and total blocking time
  • Allows users to compare their website’s performance against competitors


Free and easy to access

Provides a comprehensive analysis of speed performance

Gives actionable suggestions on speed improvements


The tool is only focused on speed performance

Some metrics are simplified and may not reflect the actual user experience

Pricing: It's a free audit tool.

15. Google Search Console

Google Search Console seo audit tool

Google Search Console is a free tool provided by Google that helps website owners monitor and maintain their website's presence in Google search results. 

It provides valuable insights into how Google crawls and indexes your website, as well as identifies any issues that could negatively impact your website's ranking in search results.


  • Shows you how website is performing on Google
  • Highlights indexing issues
  • Sitemap submission
  • Mobile usability reports


Provides direct access to data from Google

Completely free and easy use


Offers limited historical data

Google Search Console data may not always match up with other analytics tools

Pricing: It's completely free!

Conclusion: What’s the best SEO audit tool?

The above list includes a range of tools for various use cases. With so many options available, how can you determine the best one for your needs?

Here are our top 5 favorites:

SE Ranking: This is the best SEO audit tool for most users. It offers an affordable, comprehensive SEO toolkit with built-in auditing and a powerful report builder.

Semrush: For enterprise customers, Semrush is the optimal choice. It is an all-in-one solution that provides a vast array of tools for SEO, PPC, and content marketing. It can be a bit pricey!

Sitechecker: This is another popular choice for its in-depth site auditing and actionable checklists. 

Nightwatch: Thi is the best affordable, comprehensive site auditing and rank-tracking tool.

Woorank:  With its user-friendly interface and customizable reports, Woorank is an affordable choice for businesses of all sizes. 

Your ideal SEO audit tool will ultimately depend on your unique requirements and budget. It's crucial to thoroughly consider 

each of these tools, and select the one that best meets your needs.

Have questions

How to do an SEO audit?

Here are steps through which you can perform an SEO audit:

  1. Analyze website structure and technical issues
  2. Evaluate website content
  3. Review on-page SEO factors
  4. Analyze backlinks
  5. Review social media presence
  6. Check for penalties and indexing issues
  7. Use SEO tools to identify issues and make recommendations for improvement
  8. Develop an action plan to improve the website's SEO performance.

What is a technical SEO audit?

A technical SEO audit is a process of evaluating a website's technical components such as website speed, security protocols, site architecture, and other technical factors.

It identifies any issues that could impact its search engine visibility and provides recommendations to address those issues.

Why is SEO audit important?

SEO audit is crucial to find and to fix website problems that hinder search engine visibility and visitor growth. 

What are the best free SEO audit tools?

The best free SEO audit tools are:

  • Ahrefs Webmaster Tools: Provides the best backlinks crawler.
  • PageSpeed Insights: Best for improving loading page speed. 
  • Google Search Console: Best detailed analytics report compared to other free tools.

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Irina Maltseva

Irina is a Founder at ONSAAS, Growth Lead at Aura, and a SaaS marketing consultant. She helps companies to grow their revenue with SEO and inbound marketing. In her spare time, Irina entertains her cat Persie and collects airline miles.

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