diff --git a/.isort.cfg b/.isort.cfg
index 61058ac959706e6539e9ae597215af2c204158e6..4bd2ae9503bbfa800538a5710d467e9a5b5f56fb 100644
--- a/.isort.cfg
+++ b/.isort.cfg
@@ -2,6 +2,5 @@
 # config compatible with Black
 line_length = 88
 multi_line_output = 3
-default_section = "THIRDPARTY"
 include_trailing_comma = true
 known_third_party = PyPDF2,arrow,bleach,bs4,captcha,django,environ,faker,ics,markdown,modelcluster,pirates,pytest,pytz,requests,sentry_sdk,snapshottest,taggit,wagtail,wagtailmetadata,weasyprint,yaml
diff --git a/README.md b/README.md
index 6892c68b8643c0a4bbda73c2668498de4aec1d1f..8aab654c31da506271fb117dfdda614d67d89891 100644
--- a/README.md
+++ b/README.md
@@ -136,6 +136,7 @@ Různé:
 | `MAJAK_ENV` | prod | `prod`/`test`/`dev` prostředí kde Maják běží |
 | `SENTRY_DSN` | | pokud je zadáno, pády se reportují do Sentry |
 | `SEARCH_CONFIG` | english | nastavení jazyka fulltextového vyhledávání, viz níže |
+| `DEBUG_TOOLBAR` | False | zobrazit Django Debug Toolbar (pro vývoj) |
 
 Settings pro appky na weby:
 
@@ -283,6 +284,13 @@ Django development server na portu `8006` se spustí příkazem:
 
 Poté můžete otevřít web na adrese [http://localhost:8006](http://localhost:8006)
 
+##### Debug Toolbar
+
+Pro spuštění development serveru s Django Debug Toolbar nastavte environment
+proměnnou `DEBUG_TOOLBAR`. Např.:
+
+    $ DEBUG_TOOLBAR=1 make run
+
 #### Django shell
 
 Django shell používající `shell_plus` z Django extensions spustíte:
diff --git a/majak/settings/dev.py b/majak/settings/dev.py
index a865fc78eec6166ece82cdb82caaf73a161c82f3..a58152a442a061e82da626cfb4b48206bc16561a 100644
--- a/majak/settings/dev.py
+++ b/majak/settings/dev.py
@@ -8,3 +8,15 @@ SECRET_KEY = env("DJANGO_SECRET_KEY", default="58asda4d6nasd*jkj!dbska83asd54")
 ALLOWED_HOSTS = env.list("DJANGO_ALLOWED_HOSTS", default=["*"])
 INSTALLED_APPS += ["wagtail.contrib.styleguide"]
 MAJAK_ENV = env.str("MAJAK_ENV", default="dev")
+
+# django-debug-toolbar
+# ------------------------------------------------------------------------------
+if env.bool("DEBUG_TOOLBAR", default=False):
+    INSTALLED_APPS += ["debug_toolbar"]
+    MIDDLEWARE += ["debug_toolbar.middleware.DebugToolbarMiddleware"]
+    DEBUG_TOOLBAR_CONFIG = {
+        "DISABLE_PANELS": ["debug_toolbar.panels.redirects.RedirectsPanel"],
+        "SHOW_TEMPLATE_CONTEXT": True,
+    }
+    INTERNAL_IPS = ["127.0.0.1"]
+    SILENCED_SYSTEM_CHECKS = ["debug_toolbar.W006"]
diff --git a/majak/urls.py b/majak/urls.py
index 66a1e21220f566a619b456f8f470992c47762c85..65c9fb04fd688c2f195a8cd6c16e9472b18676d3 100644
--- a/majak/urls.py
+++ b/majak/urls.py
@@ -34,6 +34,12 @@ if settings.DEBUG:
     urlpatterns += staticfiles_urlpatterns()
     urlpatterns += static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)
 
+    if "debug_toolbar" in settings.INSTALLED_APPS:
+        import debug_toolbar
+
+        urlpatterns = [path("__debug__/", include(debug_toolbar.urls))] + urlpatterns
+
+
 urlpatterns = urlpatterns + [
     # For anything not caught by a more specific rule above, hand over to
     # Wagtail's page serving mechanism. This should be the last pattern in
diff --git a/requirements/dev.in b/requirements/dev.in
index 0ffbf3d4fd22f9bc592e39fe912feaac6d2f19db..008130f4de9766afc9c25085d2f76df65daa1716 100644
--- a/requirements/dev.in
+++ b/requirements/dev.in
@@ -1,3 +1,4 @@
+django-debug-toolbar
 pytest
 pytest-sugar
 pytest-factoryboy
diff --git a/requirements/dev.txt b/requirements/dev.txt
index 0a306787ddf237cdc7a2d40e5db3ba524c0183b5..8fac78709ac82715bcd625403b4f8f798ca1b1e3 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -4,10 +4,16 @@
 #
 #    pip-compile dev.in
 #
+asgiref==3.5.0
+    # via django
 attrs==21.4.0
     # via pytest
 coverage[toml]==6.3.2
     # via pytest-cov
+django==4.0.3
+    # via django-debug-toolbar
+django-debug-toolbar==3.2.4
+    # via -r dev.in
 factory-boy==3.2.1
     # via pytest-factoryboy
 faker==13.3.1
@@ -61,6 +67,10 @@ six==1.16.0
     #   snapshottest
 snapshottest==0.6.0
     # via -r dev.in
+sqlparse==0.4.2
+    # via
+    #   django
+    #   django-debug-toolbar
 termcolor==1.1.0
     # via
     #   pytest-sugar