What is an SSL certificate, what does it do, and what's the difference between having a free SSL and buying one? Let's go through it from start to finish.
What Is SSL? What Is an SSL Certificate?
SSL (Secure Sockets Layer) is a security technology that encrypts the data exchanged between a website and its visitors. It uses cryptography to scramble the information passing between browser and server, so even if a malicious party intercepts the data, they can't read it.
The SSL certificate is the digital identity that switches this technology on. While TLS (Transport Layer Security) has largely replaced SSL today, the term "SSL certificate" is still widely used.
The Security SSL Provides
An SSL certificate isn't only about security; it also affects your site's reputation, user trust, and search visibility.
- 🔐 Data security — sensitive data like passwords, card numbers, and email is encrypted.
- ✅ User trust — the padlock in the address bar tells users "this site is secure."
- 📈 SEO benefit — Google has given HTTPS sites a ranking advantage since 2014.
- ⚠️ Avoiding warnings — modern browsers flag HTTP sites as "Not Secure."
- 🏢 Identity verification — with OV/EV certificates in particular, the business identity is independently verified.
Types of SSL Certificate
SSL certificates fall into three main categories by level of validation:
| Type | What it verifies | Best for |
|---|---|---|
| DV (Domain Validation) | Domain ownership only (fastest, cheapest) | Personal blogs, small sites |
| OV (Organization Validation) | Domain + business identity | Corporate sites, registered businesses |
| EV (Extended Validation) | Most thorough; business identity verified in detail | E-commerce sites, large brands |
Note: EV offers the most thorough validation; the verified business identity is embedded in the certificate (viewable in its details). Browsers once showed the company name in the address bar for EV, but that display has largely been removed in today's browsers.
Can You Have HTTPS Without SSL?
No. HTTPS is the version of HTTP secured with SSL/TLS; without SSL, the HTTPS protocol doesn't work. That's why every website that wants HTTPS needs an SSL certificate.
How to Get an SSL Certificate
- Determine your need — a free DV is enough for a blog/personal site; OV for a corporate site; EV is recommended for e-commerce.
- Choose your provider — your hosting company's SSL, or an independent provider.
- Create a CSR — prepare the encoded text needed to apply. You can generate one in minutes with our CSR Generator.
- Have the certificate issued — pick the product that fits your need (see the list below).
- Install and test — after installation, open your address with https://; if the browser shows the padlock, you're done.
The main certificates SSL.com offers:
- 🌐 Domain Validation (Basic) SSLView →
- 🔒 Premium SSLView →
- 🛡️ Wildcard SSLView →
- 📑 Multi-Domain SSL (UCC/SAN)View →
- 🏢 Enterprise EV UCC/SAN SSLView →
- ⭐ EV SSL (Extended Validation)View →
- 🖊️ Code Signing CertificatesSee →
- 📧 Email / S/MIME CertificatesSee →
- 📄 Document Signing CertificatesSee →
- 👤 Client Authentication CertificatesSee →
What Happens Without SSL?
A site without SSL runs over plain HTTP. The consequences:
- 🔓 Higher data-theft risk — passwords and card details travel unencrypted; attackers can grab them easily.
- ⚠️ Browser warnings — Chrome, Firefox, and Safari flag HTTP sites as "Not Secure," and visitors leave fast.
- 📉 SEO loss — Google prioritizes HTTPS sites; an SSL-less site falls behind.
- 🛒 Lower customer trust — without a secure connection, users hesitate to pay.
- ⚖️ Legal liability risk — in some regions, failing to protect user data can create legal problems.
A secure site is a trusted brand.
Wrapping Up
An SSL certificate is a must for any modern website. It's not just about data security; it plays a critical role in user trust, brand reputation, and SEO. Free solutions are fine to start with, but as your business grows and your security needs increase, moving to a paid certificate is the safest choice over the long run.