How to Import SSL Certificate in AWS ACM – Complete Guide

In today’s digital landscape, ensuring secure communication between users and websites is crucial. SSL certificates play a vital role in establishing a secure connection by encrypting data transmitted over the internet. Amazon Web Services (AWS) provides a service called AWS Certificate Manager (ACM) that simplifies the process of managing SSL certificates. In this article, we will guide you through the process of how to import SSL certificate in AWS ACM, allowing you to secure your website effectively.

What is an SSL Certificate?

An SSL (Secure Sockets Layer) certificate is a digital certificate that authenticates the identity of a website and enables an encrypted connection between the server and the user’s browser. It ensures that sensitive information, such as passwords, credit card details, or personal data, transmitted between the user and the website remains secure and cannot be intercepted by malicious entities.

Why Import SSL Certificate in AWS ACM?

AWS Certificate Manager (ACM) offers several advantages for managing SSL certificates. By importing your SSL certificate into AWS ACM, you can centralize the management of your certificates, automate the renewal process, and easily integrate them with other AWS services, such as Elastic Load Balancing (ELB) or Amazon CloudFront.


Before importing an SSL certificate into AWS ACM, ensure that you have the following:

  • An AWS account with appropriate permissions to access ACM.
  • An SSL certificate file in PEM format and its corresponding private key file.
  • Intermediate certificate files, if applicable.
  • Access to the email address associated with the domain for certificate validation.

Generating a Certificate Signing Request (CSR)

If you don’t already have an SSL certificate, you’ll need to generate a Certificate Signing Request (CSR). A CSR is a file containing your website’s public key and other identifying information. It is used to request a digital certificate from a Certificate Authority (CA). There are various tools available to generate a CSR, such as OpenSSL.

Purchasing an SSL Certificate

To obtain an SSL certificate, you can either purchase one from a trusted Certificate Authority or use a free certificate from Let’s Encrypt. When purchasing a certificate, make sure to provide the CSR generated in the previous step. The CA will verify your ownership of the domain before issuing the certificate.

How to Import SSL Certificate in AWS ACM – Steps

Now that you have your SSL certificate files ready, follow these steps to import them into AWS ACM:

  1. Open the AWS Management Console and navigate to the ACM service.
  2. Click on “Import a certificate” and paste the certificate, private key, and intermediate certificates into the corresponding fields.
  3. Review the information and click on “Import.”

Verifying the Certificate

After importing the SSL certificate, AWS ACM will automatically verify its ownership by sending an email to the registered domain owner’s email address. Follow the instructions in the email to complete the verification process.

Updating Your Load Balancer or Web Server

To use the imported SSL certificate, you need to update your load balancer or web server configuration. The exact steps may vary depending on the service you are using. Refer to the documentation of your load balancer or web server for instructions on how to update the SSL certificate.

Testing SSL Certificate Installation

After updating the SSL certificate, it’s essential to test if the installation was successful. Use online SSL checker tools or browser extensions to verify the validity and security of your SSL certificate. These tools will provide detailed information about your certificate and alert you to any potential issues.

Troubleshooting Common Issues

While importing SSL certificates, you may encounter some common issues. Here are a few troubleshooting tips:

  • Verify that the certificate and private key match.
  • Ensure that you have provided the correct intermediate certificates, if applicable.
  • Double-check your load balancer or web server configuration for any errors.
  • Check for any DNS issues that might prevent domain ownership verification.


Importing an SSL certificate into AWS ACM is a straightforward process that enhances the security of your website and simplifies certificate management. By following the steps outlined in this article, you can import your SSL certificate, verify its ownership, and update your load balancer or web server configuration. Enjoy the benefits of a secure and trusted connection for your users.


Q1: Can I import SSL certificates from other Certificate Authorities into AWS ACM?

Yes, you can import SSL certificates from other Certificate Authorities into AWS ACM as long as they are in the appropriate format (PEM) and meet the required criteria.

Q2: Can I import wildcard SSL certificates into AWS ACM?

Yes, AWS ACM supports the import of wildcard SSL certificates, which can secure multiple subdomains under the same domain.

Q3: How often do I need to renew my SSL certificate imported in AWS ACM?

AWS ACM manages the renewal process automatically for imported certificates. The renewal occurs before the expiration date, ensuring continuous certificate coverage.

Q4: Can I import SSL certificates into AWS ACM for use with AWS CloudFront?

Yes, you can import SSL certificates into AWS ACM and use them with AWS CloudFront to enable secure connections for your content delivery.

Q5: Can I import multiple SSL certificates into AWS ACM?

Yes, you can import multiple SSL certificates into AWS ACM. This allows you to manage all your certificates in a centralized manner and easily assign them to different resources.

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