# getCrlUrl

## Content

# Function: getCrlUrl()

```ts
function getCrlUrl(certificatePem): string;
```

Extracts the first CRL (Certificate Revocation List) URL from a PEM-encoded X.509 certificate.

If multiple CRL URLs are present, only the first one is returned.

## Parameters

### certificatePem

`string`

PEM-encoded X.509 certificate.

## Returns

`string`

The first CRL URL if available; otherwise `null`
if the extension is missing or contains no URLs.