Free SEO Tools for Technical Checks

Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.

Get approximate IP details.

Get all possible details about an SSL certificate.

Get all possible details about a domain name.

Website status checker.

Extract all the text of a website from the source code of the page.

Verify the time to first byte of any website.

Check the total size of a web page, including all resources, for performance analysis.

Get & verify the meta tags of any website.

Get the web-host of a given website.

Get all the HTTP headers that an URL returns for a typical GET request.

Check whether a website is using the new HTTP/2 protocol or not.

Check if the URL is cached or not by Google.

Check for 301 & 302 redirects of a specific URL. It will check for up to 10 redirects.

Take an IP and try to look for the domain/host associated with it.

Check whether a website is using the Brotli Compression algorithm or not.

Analyze the ratio of text content to HTML code for SEO and performance optimization.

Checks if a webpage is set to noindex, preventing it from appearing in search engines.

Check the status code returned by a website for a generated missing page.

Check if a website has a robots.txt file and review its sitemap and disallow rules.

Extract and review all H1-H6 headings from a webpage.

Check if a webpage has a canonical tag and view its canonical URL.

Find JSON-LD schema markup on a webpage and check whether its JSON can be parsed.

Checks if images have alt attributes for accessibility and SEO.

Detects outdated HTML tags that should be replaced with modern alternatives.

Check if a website has HTTP Strict Transport Security (HSTS) enabled.

Check if your server signature is present in your website's header response.

Check if a website has a valid favicon and if it is correctly linked in the HTML.

Check if the URL is banned and marked as safe/unsafe by Google.

Check if images on a webpage have the lazy loading attribute enabled for performance optimization.

Get the title tag and its character count from a webpage.

Get the meta description and its character count from a webpage.

Get the HTML language attribute from a webpage.

Check if a webpage uses a meta refresh redirect or reload.

Count the total number of HTML elements in a webpage.

Check if a webpage has a meta viewport tag for mobile devices.

Check if a webpage declares its character encoding.

Check if a website response uses gzip, Brotli, or another compression algorithm.

Check if a webpage has an HTML doctype declaration.

Find social media profile links on a webpage.

Count the words contained in the visible content of a webpage.

Find the most frequently used words and their density on a webpage.

Find plaintext email addresses exposed in a webpage source.

Find HTML elements that use inline CSS styles.

Find webpage images and display their file formats.

Display the path and structural characteristics of a URL.

Find forms on HTTPS webpages that submit data to insecure HTTP URLs.

Find external links missing noopener or noreferrer attributes.

Find JavaScript tags and display their defer and async attributes.

Count the resources requested by a webpage.

Find all internal links on a webpage.

Find all external links on a webpage.

Check if a website returns a Content-Security-Policy header.

Find and validate the SPF record of a domain.

Check if a website returns a Referrer-Policy header and display its value.

Parse a sitemap and extract all discovered URLs.

Find insecure HTTP resources referenced by an HTTPS webpage.

Enter your website URL and you will get an instant preview of how it would look when finding it on Google.

Enter your website URL and you will get an instant preview of how it would look when finding it on Bing.

Enter your website URL and you will get an instant preview of how it would look when finding it on Yandex.

Enter your website URL and you will get an instant preview of how it would look when finding it on Yahoo.

Enter your website URL to preview how your pages appear when shared on social media platforms like Facebook and X (Twitter).

Minify your HTML by removing all the unnecessary characters.

Minify your CSS by removing all the unnecessary characters.

Minify your JS by removing all the unnecessary characters.

Check the Ahrefs Domain Rating of a website.

See which AI crawlers the robots.txt of a website allows or blocks for a URL, and which rule decides.

List the hreflang annotations of a page from the HTML and the HTTP Link header, check the format of the codes, the self-reference and x-default, and check the return links.

Check the HTTP security headers of a URL, with the raw value of each header and the verdict of its audit rule.

Check the links of a web page for broken links, redirects and errors.

Check the HTTP status code, final URL and redirect count of a list of URLs at once, with a CSV download.

Test a URL against any user-agent on the live or a pasted robots.txt, and see the group and line that decide.

Validate an XML sitemap or sitemap index and check a sample of its URLs for errors, redirect chains and noindex.

Look up the DMARC record of a domain and the DKIM key of a selector, and check their syntax.

Check the llms.txt file of a website: status, content type and the structure proposed at llmstxt.org.

Check the order of the elements in a page's head against an order you set: charset, viewport, title, description, canonical and more.

Check the H1 to H3 headings of a page against Title Case or sentence case and get the corrected text.

Validate a quikseo.config.json site contract and run its assertions on a URL.