Get all tags from taggit

You can use all() to get all the tags in your database:

from taggit.models import Tag
tags = Tag.objects.all()

If you need a complete solution, have a look at django-taggit-templatetags. It provides several templatetags, including one for tag list, to expose various taggit APIs directly to templates.

The currently maintained fork supporting newer versions of django is: https://github.com/fizista/django-taggit-templatetags2

django-taggit-templatetags has not been maintained for some years.

I know this is an old question...but I'm a Django newbie and found this question while looking for a way to fill an Ajax dropdown with all tag options. I figured out a way with djangorestframework and wanted to put a more complete solution here for others (OP would also be able to populate a sidebar with the response, or do anything else with it).

This adds an api endpoint tag so you can not only view them by navigating to /tag/ but get a JSON response suitable for Ajax (ergo, this assumes you have djangorestframework installed and in use).

serlializers.py

from taggit.models import Tag
class MyTagSerializer(serializers.ModelSerializer):
    class Meta:
        model = Tag
        fields = ['name', 'slug']

views.py

from taggit.models import Tag
class TagViewSet(viewsets.ModelViewSet):
    """
    Not using taggit_serializer.serializers.TaggitSerializer because that's for listing
    tags for an instance of a model
    """
    queryset = Tag.objects.all().order_by('name')
    serializer_class = MyTagSerializer

urls.py

router.register(r'tag', TagViewSet)

And, if you need the ajax:

$(document).ready(function(){

   $.ajax({
      url : "/tag/",
      dataType: "json",
      type: 'GET'
    }).done(function(response){
      for (var i in response) {
        tagEntry = response[i];
        $('#tagdropdown').append($('<option>', {
            value: tagEntry.name,
            text: tagEntry.name
        }));
      }
    }).fail(function(response){
      console.log('failed!');
      console.log(response);
    });

});