Jekyll Liquid site.tags

Jekyll_tags_by_name.html

{% capture site_tags %}{% for tag in site.tags %}{{ tag | first | downcase }}#{{ tag | first }}{% unless forloop.last %},{% endunless %}{% endfor %}{% endcapture %}
{% assign tag_hashes = site_tags | split:',' | sort %}
<ul class="list-group">
{% for hash in tag_hashes %}
  {% assign keyValue = hash | split: '#' %}
  {% capture tag_word %}{{ keyValue[1] | strip_newlines }}{% endcapture %}
  <li class="list-group-item">
    <a href="/tags/{{ tag_word }}">
      {{ tag_word }}
      <span class="badge pull-right">{{ site.tags[tag_word].size }}</span>
    </a>
  </li>
{% endfor %}
</ul>

Jekyll_tags_by_size.html

{% capture site_tags %}{% for tag in site.tags %}{{ tag[1].size }}#{{ tag | first | downcase }}#{{ tag | first }}{% unless forloop.last %},{% endunless %}{% endfor %}{% endcapture %}
{% assign tag_hashes = site_tags | split:',' | sort %}
<ul class="list-group">
{% for hash in tag_hashes %}
  {% assign keyValue = hash | split: '#' %}
  {% capture tag_word %}{{ keyValue[2] | strip_newlines }}{% endcapture %}
  <li class="list-group-item">
    <a href="/tags/{{ tag_word }}">
      {{ tag_word }}
      <span class="badge pull-right">{{ site.tags[tag_word].size }}</span>
    </a>
  </li>
{% endfor %}
</ul>

source: https://www.codeofclimber.ru/2015/sorting-site-tags-in-jekyll/