Your browser is out of date. The site might not be displayed correctly. Please update your browser.

Knowledge Base
SEMrush Toolkits
SEO Toolkit
Site Audit
What Issues Can Site Audit Identify?

What Issues Can Site Audit Identify? Question

With the ability to check over 120 website issues, SEMrush Site Audit makes your website audit process easy and effective. Below you can find the complete list of errors, warnings, and notices and a little bit about the categories of issues that Site Audit checks for. For more information each of the issues and why you should fix them, download the Ultimate Site Audit Checklist

Full list of issues
Crawlability and Architecture
On page SEO
Technical SEO
HTTPS Implementation
International SEO
Internal Linking

Crawlability and Architecture

First and foremost, your website has to be crawlable before you can begin to think about SEO. To foster easier navigation for search crawlers, the website’s structure should be clean and well-organized. In order to make your structure as clean as possible, some of the main focus areas will be your sitemap, robots.txt file, and your internal links and URL structure. Site Audit covers over 20 of the most important common issues in this area.

On Page SEO

Issues regarding your content, title tags, h1 tags, meta descriptions, and images all play into your website’s on page SEO. In order to optimize, you’ll want to avoid any duplicate content, titles, descriptions or h1 tags. You’ll also need to make sure that your content, titles, and descriptions are all at an optimal length. Site Audit checks for over a dozen of the most common on-page SEO issues, so you can identify all of the mistakes on your site that could be hurting you.

Technical SEO

A great deal of SEO depends on technical aspects of a website such as proper HTML, page load speed, and mobile optimization. Site Audit will tell you if you have any pages with an oversized HTML file or slow load speeds. It will also point out the use of flash, frames, or other outdated technology that should be avoided for SEO.

HTTPS Implementation

When moving a website from HTTP to HTTPS there are a lot of common mistakes that you can run into. From proper certificates to redirects and canonicals, encryption and more, Site Audit checks for every possible issue involved when a website moves to HTTPS. There’s a dedicated report showing all of your HTTPS-related issues which you can get to quickly by following the widget from the Overview report.

International SEO

For larger companies and global websites, international SEO can be tricky. Correct usage of hreflang tag is going to be critical to your success getting search visibility across the regions and languages you desire. Site Audit checks for multiple issues like the use of the right language and country codes, conflicts with page source code, incorrect hreflang links, and more.


Accelerated Mobile Pages (AMP) are one of Google’s preferred methods of delivering mobile web pages, and Site Audit checks over 40 of the most common AMP-related issues, more than any other software on the market.


Performance-related checks in Site Audit will look for issues concerning a website’s page loading speed and user experience. Page load speed is becoming one of the most important SEO factors these days - if your site is too slow to load, users will leave and look for another website to visit. To help your performance, it is important to keep the HTML, CSS, and Javascript on your site lightweight and easy for crawlers to read.

Internal Linking

The internal Linking report gives you a full in-depth look at all of the internal links on for an entire website. You will further see four different widgets that can help identify specific issues; Link Distribution, Incoming Internal Links, Pages to add Outgoing Links and Internal Links Issues. These issues can include something large such as internal links that are broken, to minor ones such as pages only having one internal link.

Full List of Issues Site Audit Can Identify

Below is the list of all errors, warnings, and notices that Site Audit can identify on a website. All issues should be addressed to improve your Site Audit score and website health. The order of priority is Errors (most harmful to a website) - Warnings (harmful) - Notices (least harmful). 


  • hreflang conflicts within page source code
  • pages returning 5XX status code
  • pages don't have title tags
  • issues with duplicate title tags  
  • pages with duplicate content issues
  • broken internal links
  • pages couldn't be crawled
  • pages couldn't be crawled (DNS resolution issues)
  • pages couldn't be crawled (incorrect URL formats)
  • broken internal images
  • pages with duplicate meta descriptions
  • format errors in Robots.txt file
  • format errors in sitemap.xml files
  • incorrect pages found in sitemap.xml
  • pages with a WWW resolve issue
  • pages with no viewport tag
  • size of HTML on a page is too large
  • AMP pages with no canonical tag
  • issues with hreflang values
  • pages returning 4XX status code
  • issues with incorrect hreflang links
  • non-secure pages
  • issues with expiring or expired certificate
  • issues with old security protocol
  • issues with incorrect certificate name
  • issues with mixed content
  • no redirect or canonical to HTTPS homepage from HTTP version
  • redirect chains and loops
  • AMP HTML issues
  • AMP style and layout issues
  • AMP templating issues
  • pages with a broken canonical link
  • pages with multiple canonical URLs
  • pages with a meta refresh tag
  • issues with broken internal JavaScript and CSS files
  • subdomains don’t support secure encryption algorithms
  • sitemap.xml files are too large
  • pages with slow load speed


  • pages with too much text within the title tags
  • pages without enough text within the title tags
  • pages with low text-HTML ratio  
  • pages without meta descriptions
  • pages with duplicate H1 and title tags  
  • pages without an h1 heading  
  • pages with an underscore in the URL  
  • sitemap.xml not indicated in robots.txt  
  • pages with a low word count  
  • pages with temporary redirects  
  • images without alt attributes  
  • broken external images
  • pages with too many parameters in their URLs  
  • pages with no hreflang and lang attributes  
  • pages without character encoding declared  
  • pages without doctype declared  
  • pages using Flash  
  • pages containing frames  
  • broken external links
  • internal links containing nofollow attribute
  • pages with too many on-page links  
  • sitemap.xml not found
  • subdomains don't support SNI  
  • homepage does not use HTTPS encryption  
  • HTTP URLs in sitemap.xml for HTTPS site  
  • links on HTTPS pages leading to HTTP page  
  • uncompressed pages  
  • issues with blocked internal resources in robots.txt  
  • issues with uncompressed JavaScript and CSS files
  • issues with uncached JavaScript and CSS files  
  • pages have a JavaScript and CSS total size that is too large  
  • pages use too many JavaScript and CSS files  
  • issues with unminified JavaScript and CSS files


  • pages that need more than 3 clicks to be reached
  • external links containing no follow attributes
  • subdomains don't support HSTS
  • URLs that are too long
  • pages with more than one H1 tag
  • robots.txt not found
  • pages with hreflang language mismatch issues
  • pages that were blocked from crawling
  • orphaned pages (from Google Analytics)
  • orphaned pages (in sitemap)
  • pages that take more than 1 second to become interactive
  • pages blocked by X-Robots-Tag
  • noindex HTTP header
  • issues with blocked external resources in robots.txt
  • issues with broken external JavaScript and CSS files
  • URLs with a permanent redirect