HTTP Server Headers Check

HTTP full form is "Hypertext Transfer Protocol", and Header is nothing but a response code and its value you will send from your Web Server to Web Browser (nothing but a Client) once you visit any website page.

The HTTP Header knowledge is very useful for Website Security purpose as it will tell Web Browser on what need to be fetched from the Server. So it need to be carefully examine on what you are sending response to the Web browser.
An HTTP header check allows you to analyze the headers sent by a web server in response to a request. These headers contain critical information about the server, the website, and the response itself.
Here's what you can do with an HTTP header check:
Analyze server configuration:
Check for security headers like X-XSS-Protection and Content-Security-Policy to ensure website security. Verify if hotlink protection and file compression are enabled for optimal performance. Identify the server software and its version for compatibility purposes.
Debug website issues:
Check for errors or missing headers that might be causing website problems. Analyze caching headers to ensure efficient resource delivery. Identify if the website is using a CDN and its configuration details.
Gather information about the website:
View the website's encoding and character set for proper content display. Check the Content-Type header to determine the type of content being served. Analyze cookies and other tracking headers for user experience insights.
There are several ways to perform an HTTP header check:
Command-line tools:
curl: curl -I https://www.example.com
wget: wget -S --spider https://www.example.com
Web browser developer tools:
Most web browsers offer built-in developer tools that allow you to inspect the HTTP headers for a specific page.
API:
There are many website that provides an API for programmatic access to header information.
Instructions:
Choose the tool or method you prefer. Enter the URL you want to analyze. Analyze the displayed headers and draw your conclusions.
Additional Resources:
https://developer.mozilla.org/en-US/docs/Web/HTTP/Status https://developer.mozilla.org/en-US/docs/Web/API/Response https://securityheaders.com/

There are more than 50 HTTP Header response code exist. Please find some of the major HTTP Headers response code that you should know and consider for your onpage SEO activity.

1) Cache-Control : To know if to take the CSS, Javascript from Cache or every time fresh copy from Server. If you Cache enabled than it will improve the performance as it will take the copies from local cache instead of Server.

2) Content-Encoding : If compression is enabled or not, like Gzip, deflate.

3) Content-Type : Specifies the Website format, if it is text/html format or any other format.

4) Vary : To tell if cached response needed or fresh response, if Cookies set it will take from Cookies. Vary:Accept-Encoding Vary:Cookie

5) X-Frame-Options : This is a Security headers Example : X-Frame-Options: deny Valid values are : deny - no rendering within a frame, not from any other location sameorigin - no rendering if origin mismatch, means it should be from same domain location. allow-from - allow from specified location, allow from mentioned location allowall - non-standard, allow from any location, Big security risk if you implement this.

6) Etag : Each Resource is assigned a unique identifier, like Javascript/CSS/image file assigned a unique id to distinguish with each other.

7) X-XSS-Protection : It is a Security headers for Cross Site Scripting Example : X-XSS-Protection: 1; mode=block

8) X-Powered-By : Specifies the technology of the Website application, Do not send this header for Security reason. X-Powered-By: ASP .Net

You can use our Free SEO tool to check HTTP Headers Request and Header response values of any website domain for FREE. It will list out major "HTTP Response Headers" that got fetched from the domain website once you visit that particular website.

Once you get Header result, you can download in PDF, Excel, copy it to clipboard etc. This tool will give you a freedom to check HTTP Headers of any website domain.