Security headers for your website are an important factor in keeping your site data safe and secure.
This post discusses security headers which are a quiet background feature that helps keep your website and your visitors safer, without changing how the site looks or works day to day. My post explains what they are, how you can add them, and whether they cost anything extra.
What are security headers?
Security headers are instructions sent by your website to a visitor’s web browser. They tell the browser how it should behave when loading and interacting with your site. Think of them as house rules that the browser is asked to follow while it is on your pages.
These rules can cover things like whether your site can be displayed inside another website, where scripts and images are allowed to load from, and how the browser should handle secure connections. The browser checks these instructions and applies them automatically, without the visitor having to do anything.
Some common examples include headers that enforce HTTPS connections, limit where scripts can run from, or stop your site being embedded in a malicious frame elsewhere. You do not need to understand every technical detail to benefit from them. The key point is that they reduce the chances of common attacks working in the first place.
What options do I have to implement them on my site?
There are several ways to add security headers, and the right option depends on how your site is built and hosted.
If your website is hosted on a managed platform, such as many WordPress hosts, security headers may already be partially in place. Some hosts allow you to enable additional headers through a control panel or by contacting support.
For self managed hosting, security headers can be added at server level. This is often done through configuration files on servers like Apache or Nginx. Once set, they apply automatically to every page.
Another option is to use a plugin or extension, particularly on content management systems like WordPress. These tools usually provide a simple interface where you can enable recommended headers without touching server files.
Security headers can also be set using services such as content delivery networks. These services sit in front of your website and can apply headers consistently across all traffic.
How do they protect my website?
Security headers help protect your website by reducing the attack surface. Many common attacks rely on browsers being overly permissive. Security headers help by:
- Reducing the attack surface of your website by limiting how browsers are allowed to behave
- Preventing common attacks that rely on browsers being overly permissive
- Instructing browsers to apply stricter security rules when loading your site
- Helping prevent cross site scripting attacks by controlling where scripts can load from
- Stopping clickjacking by preventing your site from being embedded in other pages without permission
- Ensuring browsers always use secure connections, even if an old or incorrect link is used
Does it cost any more to have security headers?
In most cases, no. Security headers themselves are simply configuration settings. There is no licence fee and no extra software required to use them.
If your host already supports them, the cost is effectively zero. Even when using a plugin or a content delivery network, security headers are usually included as part of the standard service.
The only real cost can be time and expertise. Setting them correctly requires some understanding of how your site works, especially if it uses third party scripts or services. Incorrect settings can sometimes block legitimate features. This is why many businesses choose to have them set up by a professional as part of a wider security or maintenance package.
Overall, security headers are a low cost, high value improvement. They quietly strengthen your website, improve trust, and help protect both you and your visitors without adding ongoing expense.
