What is Let’s Encrypt? How to Generate Let’s Encrypt SSL Certificate?

Security is no longer optional when it comes to running a website on the internet – it’s mandatory. Especially when it comes to exchanging user data, login information, or payment information, no website can be trusted without HTTPS. The most popular and free solution in this space is Let’s Encrypt.

What is Let’s Encrypt?

Let’s Encrypt is a free, automated, and open Certificate Authority(CA) that issues SSL/TLS certificates. It is operated by the Internet Security Research Group. Simply put, Let’s Encrypt provides the SSL Certificate you need to enable HTTPS on your website for free. Where SSL used to have to be purchased (ranging from $10-100 per year), Let’s Encrypt now makes it completely free.

Why is Let’s Encrypt so popular?

1. Completely free, SSL Certificate is available at no cost.
2. Automated system, no need to renew manually, auto-renew support.
3. Helps in SEO (Important), Google prioritizes HTTPS websites in ranking.
4. Increases trust and security (Important), shows the “Secure” lock icon in the browser, which increases user trust.

How to Generate a Let’s Encrypt SSL Certificate?

The easiest way to get an SSL from Let’s Encrypt is to use Certbot. It is an open source tool that automates both SSL installation and renewal.

Step 1:

Prepare the server First, you need to make sure of the following:

• You have a domain (e.g. example.com).
• The domain is pointed to your server’s IP.
• Apache or Nginx is installed on the server.

Step 2:

Install Certbot for Ubuntu/Debian server:

sudo apt update
sudo apt install certbot python3-certbot-apache

If using Nginx:

sudo apt install certbot python3-certbot-nginx

Step 3:

Generate SSL If you are using Apache, for this:

sudo certbot --apache

For Nginx:

sudo certbot --nginx

When you hit the commands, some questions will appear:

• You will need to provide your email.
• You will need to accept the terms.
• You will need to select which domain you need SSL for.

If everything is correct then Certbot will generate the SSL itself, set it up on the server, and start the HTTP to HTTPS redirect.

Step 4:

Now verify SSL, go to your browser and check if it loads with https:// when you hit “https://yourdomain.com/”. Also, if the lock icon appears, SSL is working successfully.

Auto Renewal Setup

Let’s Encrypt SSL is valid for 90 days. But don’t worry – Certbot can renew it automatically.
To test, run this command:

sudo certbot renew --dry-run

Cron job is usually set automatically, but if you want to be sure, run this command:

sudo crontab -e

Manual SSL Generate

You can manually generate SSL without automation, but you have to configure it yourself (by editing the Apache/Nginx config file).

sudo certbot certonly --standalone -d yourdomain.com

Generated Let’s Encrypt SSL not working?

Don’t worry. This is a common problem: Web server not reloaded.

sudo systemctl reload apache2

OR, for NGINX

sudo systemctl reload nginx

What is the role of Let’s Encrypt in SEO?

Nowadays, HTTPS is not only security, but also an important part of SEO:

• Google prioritizes HTTPS sites.
• Bounce rates decrease.
• User trust increases.
• Page speed improves in some cases (due to HTTP/2 support).

Conclusion

Let’s Encrypt has revolutionized web security. Where SSL used to be a paid service, it is now open to everyone. With a few simple commands, you can migrate your website to HTTPS, making it more secure, faster, and SEO-friendly.

Whether you’re launching a new website or updating an old one, using Let’s Encrypt is no longer an option, it’s a standard.