Test2

<button type="button" class="btn btn-secondary">Left</button> <button type="button" class="btn btn-secondary">Middle</button> <button type="button" class="btn btn-secondary">Right</button>

<a href="#" class="btn btn-primary btn-lg disabled" tabindex="-1" role="button" aria-disabled="true">Primary link</a> <a href="#" class="btn btn-secondary btn-lg disabled" tabindex="-1" role="button" aria-disabled="true">Link</a>

<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" rel="stylesheet" />

<input type="file" class="custom-file-input" id="inputGroupFile01" aria-describedby="inputGroupFileAddon01">

<button type="button" id="cssBtn" class="btn btn-primary btn-lg btn-block">Convert p12 to jks</button>