> For the complete documentation index, see [llms.txt](https://docs.glesys.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.glesys.com/products/connectivity/load-balancer/how-tos/convert-an-ssl-certificate-from-crt-to-pem-format.md).

# Convert an SSL certificate from CRT to PEM format

***

Glesys Load Balancers accept PEM certificates, and here we explain how to convert your existing CRT‑based certificate to PEM.

When you order a certificate, a CSR file is required. Generating the file also creates a key, for example:

* `domain.com.csr`
* `domain.com.key`

When you purchase a certificate, you also receive the remaining files:

* `domain.com.crt`
* `gs_intermediate_domains_ca.crt` (ca\_bundle)

Three of the files listed above are required to create a complete PEM certificate. Run the following commands to convert your CRT-based certificate to PEM format:

{% code title="Multiple commands" %}

```
openssl x509 -in domain.com.crt -out domain.com.pem
openssl rsa -in domain.com.key >> domain.com.pem
openssl x509 -in gs_intermediate_domains_ca.crt >> domain.com.pem
```

{% endcode %}

Open the `domain.com.pem` file in any text editor, copy its contents, and paste them into the load balancer.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.glesys.com/products/connectivity/load-balancer/how-tos/convert-an-ssl-certificate-from-crt-to-pem-format.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.