What is a website security certificate and why does your site need one?

Website security certificates go by several different names, and that is where most of the confusion starts. A website security certificate is the same thing as an SSL certificate, a TLS certificate, or the thing that puts the padlock in your browser's address bar. Different terms, same item. Once that clicks, everything else about website security certificates becomes a lot simpler to understand.

The padlock in a browser address bar, the HTTPS at the start of a web address, the "Not secure" warning on sites that do not have one — all of these come back to a single thing: a website security certificate. For a full explanation of how these connect to the broader topic of keeping a site safe, see the article on why website security is important.

What is a website security certificate?

A website security certificate is a small file installed on a web server that does two things. It scrambles the data sent between the visitor's browser and your site so that no one else can read it in transit, and it proves that your site is who it says it is. When both of those things are in place, the browser shows the padlock and the HTTPS prefix in the address bar.

What it does in plain terms

• When a visitor fills out a contact form, logs in, or enters payment details, that information travels from their browser to your server. Without a certificate, it travels in plain text that anyone on the same network could read
• With a certificate, that same information is scrambled before it leaves the browser and can only be unscrambled when it arrives at your server. Nobody in between can read it
• The certificate also carries proof that your domain belongs to you, which tells the browser it is talking to the real site and not an imitation

The different names it goes by

• SSL certificate is the most common term. SSL stands for Secure Sockets Layer, which was the original name for the technology. It has technically been replaced by a newer version called TLS (Transport Layer Security), but almost everyone still uses the term SSL
• TLS certificate refers to the same thing using the updated name. If someone mentions a TLS certificate, they mean the same item as an SSL certificate
• HTTPS certificate gets used informally because HTTPS is the visible sign that a certificate is in place
• Website security certificate is the plain-language version used when explaining it to someone without a technical background
• All of these names point to the same thing. The certificate itself does not change depending on what you call it

For a deeper look at how SSL certificates work technically, see the article on what an SSL certificate is and how it works.

What a website security certificate proves

Domain ownership

A basic website security certificate, called a domain validation certificate, proves one thing: that whoever installed the certificate controls the domain. The certificate authority (the company that issues the certificate) checks that you own the domain before issuing the certificate. The padlock you see in a browser address bar means that check passed.

This is the type of certificate that works for the vast majority of websites. Business sites, blogs, portfolios, service sites, and ecommerce stores all use domain validation certificates. It is free to get, takes minutes to set up on most platforms, and provides the same level of data protection as more expensive certificate types.

Organization identity

Higher-level certificates go further. An organization validation certificate or an extended validation certificate requires the certificate authority to verify the legal identity of the business behind the site, not just that someone controls the domain.

Banks, government sites, and large financial platforms typically use these because their visitors need to see verified proof of who is running the site. For a standard business website, the higher-level certificates are not necessary. The encryption is identical. The only difference is how much information about the organization has been verified by the issuer.

How you know a site has a website security certificate

The padlock in the address bar

Every major browser shows a padlock icon in the address bar when a site has a valid website security certificate installed. Clicking the padlock shows details about the certificate, including who issued it and when it expires. No padlock means no valid certificate.

HTTPS in the address

The S in HTTPS stands for Secure. It only appears in the address bar when a valid certificate is in place and the connection between the browser and server is encrypted. A site at an address starting with plain HTTP does not have a certificate active, even if one was installed at some point. For a full explanation of what HTTPS means and how it protects visitors, see the article on what HTTPS is and how it protects your website.

What happens on sites without one

• Browsers display a "Not secure" warning in the address bar on any site served over plain HTTP
• On pages with login fields or forms, some browsers show a more prominent warning that the connection is not private
• Visitors who see these warnings, especially on a page asking for their information, are far less likely to proceed
• Search engines use HTTPS as a ranking signal. A site without a valid certificate is at a disadvantage in search results compared to equivalent sites that have one

Why every website needs a security certificate

Visitor trust

The padlock has become a basic signal that a site is safe to use. Visitors who shop online, fill out forms, or log into accounts have learned to look for it. A site without it does not just look less secure. It looks like it has not bothered with security at all, which is a harder impression to recover from than most site owners expect.

For pages with contact forms, account logins, or any kind of checkout, the absence of HTTPS is a direct reason for visitors to stop and leave. The certificate does not just protect the data. It keeps people on the page.

Search rankings

Search engines treat HTTPS as a ranking signal. Pages served over HTTPS have an advantage over pages served over plain HTTP when everything else is equal. For competitive search terms, that advantage can make a real difference in where a page shows up. A site without a certificate is also excluded from meeting the page experience standards that search engines use as part of their ranking assessment.

Data protection

Any site that collects information from visitors, whether through a contact form, a login page, or a checkout, is handling personal data. Without a certificate, that data travels across the network in plain text. A certificate makes sure it is scrambled before it leaves the browser, so it cannot be read if it is intercepted on the way.

In many countries, collecting personal data without basic security measures in place creates legal exposure for the site owner. A website security certificate is the baseline measure for protecting data in transit and meeting the minimum standard expected by data protection laws.

How to get a website security certificate

Through your hosting provider

Many managed hosting platforms and website builders include a website security certificate as part of every plan. If that is the case, the certificate is usually installed automatically when the site or domain is connected. Nothing needs to be purchased or set up separately.

If you are already hosting a site and not sure whether a certificate is in place, visit the site and check whether the address starts with HTTPS and whether the padlock appears. If it does, the certificate is already active. If it does not, check the hosting panel or contact your provider to find out whether a certificate is included or needs to be added.

Getting one separately

Free website security certificates are available from trusted certificate authorities for sites on self-managed hosting. The verification is automated and takes minutes. The certificate is valid for 90 days and can be set up to renew automatically, so it does not expire without warning.

Paid certificates are also available and typically cover a longer validity period. For a standard domain validation certificate, the free option is equivalent in every meaningful way. The paid route is more relevant for organization or extended validation certificates, which require manual identity verification.

For step-by-step guidance on getting and installing a certificate, see the article on how to get an SSL certificate for your website.

How WEMASY handles website security certificates

SSL certificates are included on every WEMASY plan and applied automatically. When a site is created or a custom domain is connected, the certificate is issued and installed without any action needed from the site owner. There is nothing to purchase, nothing to configure, and no renewal process to manage.

All sites on WEMASY run on HTTPS by default from day one. Mixed content warnings are not a concern because all assets served through the platform use HTTPS. HTTP to HTTPS redirects are in place at the platform level, so visitors always land on the secure version of the site regardless of how they reach it.

See what is included at the WEMASY website builder, or review plan options on the pricing page.

Frequently asked questions