Load a Django template tag library for all views by default

There is an add_to_builtins method in django.template.loader. Just pass it the name of your templatetags module (as a string).

from django.template.loader import add_to_builtins

add_to_builtins('myapp.templatetags.mytagslib')

Now mytagslib is available automatically in any template.

It will change with Django 1.9 release.

Since 1.9, correct approach will be configuring template tags and filters under builtins key of OPTIONS - see the example below:

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [],
        'APP_DIRS': True,
        'OPTIONS': {
            'builtins': ['myapp.builtins'],
        },
    },
]

Details: https://docs.djangoproject.com/en/dev/releases/1.9/#django-template-base-add-to-builtins-is-removed

In django 1.7 just replace for from django.template.base import add_to_builtins

In Django 1.9 there is an libraries dictionary of labels and dotted Python paths of template tag modules to register with the template engine. This can be used to add new libraries or provide alternate labels for existing ones.

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
            'libraries': { # Adding this section should work around the issue.
                'custom_tags' : 'myapp.templatetags.custom_tags',#to add new tags module.
                'i18n' : 'myapp.templatetags.custom_i18n', #to replace exsiting tags modile
            },
        },
    },
]