SSL (Secure Sockets Layer) has officially been superseded by its more advanced successor, TLS (Transport Layer Security). However, the world still uses the term “SSL” to describe the encrypted connection that turns your website from http:// to https://.

Open browser, type your URL, and the first thing you see is a big red “Not secure” warning. For many visitors, that is the end of the session. They hit back, find someone else, and your forms, funnels, and checkout pages never get a chance.

SSL is what flips that experience. It replaces warnings with a padlock, quietly encrypts everything users send, and unlocks modern browser features your site may already rely on. Once you understand the moving parts, adding SSL and forcing HTTPS becomes a repeatable process you can apply across every domain you manage.

Why Adding SSL to Your Website Can’t Be Optional Anymore

SSL (more accurately TLS) encrypts the data moving between a visitor’s browser and your web server so that no one in the middle can read or tamper with it. That protects logins, contact forms, and payment details from interception while your users browse. It also removes “Not secure” browser warnings and replaces them with the familiar padlock, which helps maintain trust across your site.

When you do not use HTTPS, browsers increasingly flag your pages as unsafe, especially if they contain any form fields. That can scare visitors away before they ever submit a lead or start a checkout process. Some newer browser capabilities, such as service workers, advanced APIs, and geolocation, will not work at all over plain HTTP.

For SMEs, that can mean fewer form fills and online enquiries. For agencies and developers, it means unpredictable bugs and blocked features when a site is still on HTTP. Larger organizations also have compliance, policy, and audit requirements that consider HTTPS a basic control.

The good news is that moving to SSL does not have to be risky or chaotic. With a structured plan, you can add SSL, force HTTPS, and keep existing traffic and features intact.

Also Read: HTTPS vs. SSL: Understand the Difference Between SSL and HTTPS 

Understand the Basics Before You Add SSL to Your Website

Before you start clicking buttons or editing server configs, it helps to understand a few core terms. That context makes every later step feel less like guesswork and more like a controlled change.

People still say “SSL” out of habit, but the protocol currently used on the web is TLS. When you see https:// in the address bar instead of http://, it means TLS is active and traffic is encrypted in transit.

A Certificate Authority (CA) is a trusted organization that issues digital certificates. Your browser has a built-in list of CAs it trusts. When it connects to your site, it checks the certificate your server presents, the certificate chain back to a trusted CA, and whether the domain name matches what is in the certificate. Only when that trust chain validates does the browser complete the encrypted handshake.

If the SSL setup is misconfigured, you can run into site outages or scary warnings. That is why careful step-by-step changes and testing are so important. Many domain and hosting providers now offer integrated SSL options that hide most of this complexity for non-experts, which can be a safer path if you do not manage servers every day.

Choose the Right SSL Certificate for Your Business Needs

Once you understand the basics, the next decision is what kind of certificate you actually need. This depends on how many domains you run and how much identity assurance you want to provide.

Validation levels

  1. Domain Validation (DV)
    With DV, the CA only checks that you control the domain, typically through an email, DNS record, or file upload. Issuance is usually fast and the certificate provides strong encryption, which is what protects data in transit. DV works well for blogs, marketing sites, internal tools, and smaller projects where you are not asking users for highly sensitive data.
  2. Organization Validation (OV)
    OV certificates add a layer of business verification. The CA confirms your organization details, which then appear in the certificate itself. This is suitable for SMEs and enterprises that collect customer information and want visitors to know there is a real, verified business behind the site.
  3. Extended Validation (EV)
    EV involves the most detailed identity checks, often used by banks, financial platforms, and high-risk ecommerce properties. It is appropriate when reputational risk is high or regulations require robust proof of your organisation’s identity. EV usually takes longer to issue and needs more documentation.

Coverage options

Beyond validation level, think about what hostnames you must protect:

  1. Single-domain
    Secures one fully qualified domain name, such as example.com or www.example.com.
  2. Wildcard
    Covers a domain and many first-level subdomains, for example *.example.com protecting shop.example.com, blog.example.com, and so on. This is useful when you spin up new subdomains frequently.
  3. Multi-domain (SAN)
    A Subject Alternative Name (SAN) certificate can secure multiple unrelated domains or subdomains in a single certificate, such as example.com, example.in, and client-brand.net. It fits organizations or agencies managing several brands under one technical umbrella.

To choose, map your reality:

  • How many domains and subdomains do you actually use today?
  • Are the sites public-facing, internal, or a mix?
  • Do you handle logins, payments, or personal data, or mostly publish content?

Step 1 – Prepare Your Domain and Hosting for SSL

Before requesting a certificate, confirm that your domain and hosting setup are stable. You do not want to troubleshoot DNS in the middle of an SSL rollout.

First, ensure your domain’s DNS records (usually the A or CNAME records) point to the correct server or hosting account. Then check whether your current host already includes a free DV certificate or “AutoSSL” feature inside its control panel; many shared hosting plans provide this as part of the package. Finally, confirm you have the right level of access: either to a hosting control panel like cPanel/WHM or to server shell access for platforms such as Apache, Nginx, or IIS.

From a security perspective, keep logins to these systems locked down and limit who can handle private keys and certificate configuration. Treat SSL configuration like any other security-sensitive infrastructure change.

If your current host makes SSL feel manual and fragile, it may be worth moving to a provider that offers one-click SSL activation and automatic HTTPS, so you are not risking downtime when certificates renew.

Step 2 – Obtain an SSL Certificate

With your environment ready, you can obtain the certificate itself. There are three main paths, each suited to different levels of technical comfort and business requirements.

Option 1 – SSL via your hosting provider or control panel

Many hosting dashboards now let you turn on free SSL or request paid certificates directly inside the same interface you already use. The typical flow looks like this:

  1. Log in to your hosting control panel.
  2. Open the SSL/TLS or “Security” section.
  3. Choose your domain from a list.
  4. Select either a free DV option or a paid DV/OV/EV or wildcard option.
  5. Complete any validation step prompted, such as email approval, a DNS record, or a file upload.

This is usually the simplest route for SMEs and agencies that do not want to manage CSRs and keys by hand.

Option 2 – Free ACME-based solutions

If you are comfortable with the command line, you can use an ACME client to get free certificates from ACME-compatible CAs. The general process is:

  1. Install or configure an ACME client on your server.
  2. Use it to perform an HTTP or DNS challenge to prove domain control.
  3. Let the client request, obtain, and install the certificate.
  4. Schedule automatic renewals so certificates refresh before expiry.

This approach suits developers and agencies building automated deployment pipelines.

Option 3 – Purchase a certificate from a CA or reseller

You may prefer to buy directly from a CA or trusted reseller if you need OV or EV validation or specific warranties and documentation. In that case, you typically:

  1. Generate a Certificate Signing Request (CSR) and private key on your server or control panel.
  2. Submit the CSR through the CA’s order process.
  3. Complete the CA’s validation steps.
  4. Download the issued certificate and any intermediate certificates.

Stick to reputable CAs or well-established hosting providers to avoid browser trust problems and support gaps. Domain and hosting platforms like BigRock often integrate SSL purchase and issuance into a single dashboard, which reduces manual copy-paste steps and makes it easier to keep everything aligned.

Decide whether you want a simple, host-managed SSL or a more hands-on, DIY path. Choose whichever your team can maintain reliably over the long term.

Step 3 – Generate a CSR and Private Key (If Required)

You will only need to generate a CSR manually if your hosting provider does not handle it for you or if you bought a certificate separately and must install it yourself.

On platforms like cPanel or WHM, you can usually open the SSL/TLS interface, choose “Generate CSR,” select your domain, and enter your organization details. The panel will create both the private key and CSR and store the key securely on the server.

On custom servers using Apache, Nginx, IIS, or similar, you (or your sysadmin) will generate the key and CSR using server tools or command-line utilities, following the CA’s or hosting provider’s instructions.

Whichever route you take, protect the private key carefully:

  • Never email it or put it in shared documents.
  • Store it with restricted permissions on the server.
  • Use key sizes and algorithms recommended by your CA or platform.

If CSR and key management feel too low level, lean on your hosting provider’s SSL tools or support team instead of guessing commands.

Step 4 – Install the SSL Certificate on Your Server

Once you have the certificate, you must install it correctly so browsers can use it without warnings. While specifics differ by platform, the high-level steps are similar everywhere.

At a minimum, installation involves:

  • Installing the primary certificate issued for your domain.
  • Installing any intermediate or chain certificates provided by your CA.
  • Associating the certificate and private key with the correct domain or virtual host on your server.

Using cPanel / WHM or similar control panels

In control panels, the process is usually guided:

  1. Go to the SSL/TLS or “Install an SSL Certificate” section.
  2. Choose your domain.
  3. Paste in your certificate and, if needed, the CA bundle (intermediate certificates). The private key may auto-populate if it was generated there.
  4. Save or “Install” the certificate.
  5. Wait for confirmation and then test the site over HTTPS.

Using Apache, Nginx, IIS, or other servers

On custom servers, the flow looks more manual:

  1. Upload certificate and intermediate chain files to the server.
  2. Update your Apache VirtualHost, Nginx server block, or IIS site binding to reference the certificate and key files.
  3. Include references to intermediate certificates, as documented by your CA, so the full chain is available.
  4. Reload or restart the web server to apply changes.

Intermediate certificates are critical. If you leave them out or misconfigure the chain, browsers can still show “untrusted certificate” errors even when the issuing CA is widely trusted.

After installation, visit https://yourdomain.com and check the padlock and certificate details. Then use an online SSL checker to verify the hostname, chain, and expiry are all correct. After installation, run an SSL health check and note the renewal date so you can plan automation or reminders.

Step 5 – Force HTTPS for All Traffic (Without Breaking Your Site)

Having SSL installed is not enough. Many visitors will still arrive via old HTTP links, bookmarks, or search engine results if you do not actively redirect them.

The primary method to “force HTTPS” is to create permanent 301 redirects from every HTTP URL to its HTTPS equivalent. Conceptually, you want this behavior:

  • http://example.com/* to https://example.com/*
  • http://www.example.com/* to your chosen canonical HTTPS hostname.

You typically implement this by:

  • Adding rewrite rules to .htaccess on Apache servers.
  • Creating server-level redirects in Nginx server blocks.
  • Using URL rewrite rules in IIS.

Test redirects across your homepage, inner pages, and any major landing URLs to confirm there are no loops or broken paths.

Add HSTS as a second layer

Once redirects are working consistently and your SSL configuration is stable, you can strengthen things further using HTTP Strict Transport Security (HSTS). HSTS instructs browsers to always use HTTPS for your domain for a specific time period, even if the user enters or clicks an HTTP link.

Best practices for HSTS:

  1. Enable it only after your HTTPS setup and redirects are working properly and all major mixed content issues are resolved.
  2. Start with a low max-age value so that, if needed, you can adjust configurations without long lock-in.
  3. Wait before enabling includeSubDomains or submitting your domain to HSTS preload lists until you are confident everything across your infrastructure is stable.

Misconfigured redirects or overly aggressive HSTS policies can temporarily lock users out or complicate recovery if a certificate expires. Test changes on a staging environment or a test subdomain whenever possible.

Once HTTPS is enforced, update internal documentation, bookmarks, email templates, and marketing links so your team only ever shares secure URLs.

Fix Mixed Content So Your Padlock Stays Secure

Even with SSL installed and redirects in place, you might still see warnings about “mixed content.” That means your HTTPS page is loading some resources such as images, scripts, stylesheets, or iframes over plain HTTP.

Modern browsers often block these insecure resources, which can break functionality and remove the secure padlock icon.

Common sources of mixed content include:

  • Hard-coded http:// URLs in templates, themes, or inline scripts.
  • Legacy image or script URLs embedded in CMS content or old blog posts.
  • Third-party widgets or scripts that are only served over HTTP.

To find and fix them:

  1. Use browser developer tools, especially the Console and Security tabs, to view mixed content warnings and identify offending URLs.
  2. Run a mixed content or SSL scanning tool to surface all insecure references across your site.
  3. Update internal links to https:// wherever the source supports it, or use protocol-relative (//) or root-relative (/path) URLs for assets on your own domain.
  4. Replace or remove third-party resources that are not available over HTTPS.

Schedule a full mixed-content review after enabling HTTPS so you do not overlook insecure scripts or images that quietly weaken your site’s protection.

Automate SSL Renewal and Monitor for Issues

The single easiest way to break an otherwise healthy HTTPS setup is to let a certificate expire. When that happens, browsers show alarming warnings and many visitors will not proceed.

Manual renewals are easy to forget, especially across multiple domains and environments. Automation removes much of that risk.

Your Action Plan to Add SSL and Force HTTPS

Adding SSL to your website for secure browsing has never been easier.

Start with one domain today: enable SSL, force HTTPS, and run a quick SSL health check. Once you are comfortable with the process, roll the same best practices out across all your sites and clients so every visitor enjoys secure, warning-free browsing. What’s more is that hosting providers like BigRock are here to make the transition smooth for you.