Let’s face it; regardless of how great you are at search engine optimization, using SEO audit tools has become imperative.
As you might have noticed already, Google’s algorithm is progressively getting more and more complicated. It’s not just a simple game of keywords anymore. Rather, Google currently uses more than 200 factors in its ranking.
And that’s not all. As it turns out, Google tweaks its search algorithm more than 3,000 times every year. That translates to about nine changes per day.
I don’t know about you, but that’s a heck of a lot of stuff to keep up with. I prefer leaving the heavy lifting to SEO audit tools! At least they are specialized enough to dig deep and discover any SEO issues that might be compromising my web pages.
Now, in that light, allow me to walk you through 15 of the best SEO audit tools in 2021. I’ve prepared this comprehensive list after years of extensive research and trials. And yes, I’ve been considerate enough to include both advanced and simple solutions, as well as paid and free SEO auditing tools.
Best SEO audit tools in 2021
Here are the tools that have made the final list:
? Table of contents:
Best SEO audit tools #1: SEMrush
For more than a decade now, SEMrush has grown to become one of the leading veterans in the SEO space. It now comes as an all-in-one digital marketing suite that packs more than 40 intel tools – specializing in keyword research, competitor intelligence, paid ad research, content optimization, rank tracking, and social media monitoring.
Best SEO audit tools #2: SpyFU
SpyFU is another extensively-renowned name in the SEO research circles. And just like SEMrush, it packs an entire arsenal of digital marketing tools – for keyword research, backlink tracking, competitor research, PPC research, rank tracking, you name it.
It’s worth noting, though, that you won’t find a dedicated site audit tool. Instead, SpyFu combines multiple tools to provide insights into your SEO campaign. Its SEO Keyword Research tool, for instance, highlights the bad keywords that you ought to eliminate, while Competitor Research identifies the potential flaws in other similar websites.
Best SEO audit tools #3: Screaming Frog SEO Spider
Unlike most of the SEO audit tools in this space, Screaming Frog SEO Spider is not really a cloud-based software. Instead, it comes in the form of an installable tool, which then proceeds to crawl through your website while extracting on-site data, auditing SEO problems, and analyzing the results in real-time.
Both digital marketers and website owners can comfortably use it to scrape data from their web pages’ HTML, track their server errors and broken links, analyze meta descriptions and page titles, flag up blocked URLs, as well as identify temporary and permanent redirects.
Best SEO audit tools #4: Ahrefs
With over five tools to its name, Ahrefs is yet another suite that touts itself as an all-inclusive SEO toolset. It offers a Site Explorer, a Keyword Explorer, a Rank Tracker, a Content Explorer, plus a Site Audit tool.
? Read this to learn how Ahrefs differs from SEMrush.
Best SEO audit tools #5: Google Search Console
Previously known as Google Webmaster Tools, the offers a whole cluster of search performance metrics directly from the horse’s mouth. So much so that you can even go way back in time and identify SEO issues from more than 16 months of data.
In particular, a quick scan through the insights should give you a good idea of your site’s indexation and accessibility issues. Then to top it all off, Google Search Console provides details about your structured data, HTML, Accelerated Mobile Pages, broken links, and content quality.
Best SEO audit tools #6: GTMetrix
GTmetrix isn’t a website crawler per se. Rather, it’s more of a testing tool that reviews your web pages’ performance, and subsequently, grants you quick insights into the technical health of your site. A test only takes a few seconds, after which you get to view your page loading speeds, the page’s size, as well as the corresponding performance parameters such as caching, image scaling, plus scripts.
In total, GTmetrix covers about 25 SEO parameters. You can use the pointers to identify possible issues that might be affecting the performance of your web pages.
? If you want to learn how to use GTmetrix, read our in-depth tutorial.
Best SEO audit tools #7: OnCrawl
OnCrawl is built to help you make smarter SEO decisions” through its suite of SEO audit tools and other SEO software.
Combined, these tools help you comprehensively analyze your site’s technical status, particularly when it comes to search indexation, Hreflang tags, pagination, canonicals, and sitemaps. But, that’s not all. OnCrawl additionally audits your content quality, page loading speeds, plus the overall site architecture.
Best SEO audit tools #8: SE Ranking
As an all-in-one SEO tool/suite, SE Ranking competes directly with the likes of SEMrush, Ahrefs, and SpyFu. It particularly focuses on keyword research, backlink tracking, on-page analysis, PPC research, social media management, and website audit.
That said, SE Ranking’s auditing tool generally crawls link-by-link while assessing your overall website health, user experience issues, image optimization, SERP parameters, plus meta tags and meta headers. Once it’s done, it generates detailed reports on all the SEO problems, and then proceeds to give you actionable insights on how to resolve them.
Best SEO audit tools #9: DeepCrawl
Next on our list of the best SEO audit tools is DeepCrawl, a website crawler that provides granular data and metrics on your site’s technical health. It’s especially handy when you need to spy on your competitors, enhance your site’s overall user experience, assess your site’s architecture, migrate your SEO settings, and redeem yourself from Google Panda’s penalties.
DeepCrawl achieves all that by testing XML sitemaps, keeping tabs on your SEO progress history, as well as reviewing your canonical tags, content quality, meta descriptions, page titles, and meta headers.
Best SEO audit tools #10: SERPsim
Just as its name suggests, SERPsim is a SERP simulator that’s capable of generating snippets of your rankings on Google. That means you get to view how your web pages appear on Google’s search results, and consequently, use the insights to optimize your page titles and metadata.
You can, for instance, check your page headers based on Google’s current pixel length limit. Then once you’re done, SERPsim allows you to share and save copies of the snippets.
Best SEO audit tools #11: SEO Site Checkup
Used by over 5,000 webmasters, SEO Site Checkup is a suite of tools for checking your backlinks, creating sitemaps, spying on competitors, monitoring keywords, tracking regional performance, and auditing common SEO issues.
Best SEO audit tools #12: CopyScape
While most of the SEO audit tools we’ve featured here focus on the technical issues, Copyscape is all about content optimization. More specifically, it seeks to help you avoid plagiarism issues that could hurt your site’s ranking.
For instance – you could verify your content’s originality by running it through Copyscape’s plagiarism checker before publishing. And in case you’re worried about other websites copying your content, Copyscape’s page banners can be set to warn plagiarists in advance. Then for the few who happen to proceed with the vice, Copyscape’s Copysentry will help you discover plagiarized copies of your content on other websites, as well as possible duplicates on your site.
Best SEO audit tools #13: WordCounter
Still, on content optimization, you might also want to capitalize on the free WordCounter tool. It’s particularly handy when you need to assess the word count and keyword density on your web pages.
In essence, the WordCounter saves you the trouble of counting the words manually. All you need to do is enter any web page’s URL, and the tool will automatically generate information on the number of words, the most common words, plus their corresponding keyword density.
With that, you can easily compare your site with the best-ranking pages, and ultimately, use the resulting insights to improve the quality of your content.
Best SEO audit tools #14: Google Structured Data Testing Tool
The Google Structured Data Testing Tool is an SEO audit tool developed specifically for reviewing your website’s schema markup.
Now, schema markup – for your information – is a type of structured data or code that gives Google context on what your site is all about. So, by running your site through Google Structured Data Testing Tool, you get the chance to identify all the possible code errors that might be making it difficult for Google to crawl, organize, and index your content.
Best SEO audit tools #15: PageSpeed Insights
Powered by Lighthouse, PageSpeed Insights happens to be yet another SEO audit tool from Google. It’s built to run tests on your URLs, and, ultimately, assign scores based on their performance on both desktop and mobile devices.
Now, to be more specific, PageSpeeed Insights analyzes not only your page loading speeds, but also the corresponding user experience. As such, it identifies all the issues and places them into three classes – Passed Audits, Diagnostics, and Opportunities.
The Passed Audits refer to page parameters that have performed relatively well. Then Opportunities, on the other hand, are the issues that you might want to work on to improve your page’s overall performance – while Diagnostics provides insights into your page’s adherence to web development best practices.
Since each tool we’ve featured here has its own unique twist, I’d strongly advise you to consider leveraging several at a go.
You can, for instance, run your site through three or four crawlers, examine your pages with on-page checkers, or perhaps, optimize your content quality with the likes of Copyscape, SEMrush, or WordCounter. The choice is yours.
In the end, combining multiple tools translates to more accurate SEO audits. And, luckily for you, many of the best SEO audit tools offer free options.
If you want to go for a great all-around, complete SEO tool, then Ahrefs is probably your best bet. It offers SEO audit features, but also gives you a wide range of other SEO insights. We’ve been using it for years here at CodeinWP and it’s our favorite SEO tool by far.
Do you have any questions about SEO audits? Let us know in the comments section below!
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