diff --git a/linkcheck/listeners.py b/linkcheck/listeners.py
index 0642aeb..170b51a 100644
--- a/linkcheck/listeners.py
+++ b/linkcheck/listeners.py
@@ -96,7 +96,10 @@ def do_check_instance_links(sender, instance, wait=False):
 
                 if len(url) > MAX_URL_LENGTH:
                     # We cannot handle url longer than MAX_URL_LENGTH at the moment
-                    logger.warning('URL exceeding max length will be skipped: %s', url)
+                    if url.startswith("data:"):
+                        # If the URL is a data URL, it might occupy a LOT of space in the logs without being useful – truncate it
+                        url = url[:64]
+                    logger.warning('URL exceeding max length will be skipped: %s  (in %r)', url, instance)
                     continue
 
                 u, created = Url.objects.get_or_create(url=url)
diff --git a/linkcheck/utils.py b/linkcheck/utils.py
index b40dbb5..c189fec 100644
--- a/linkcheck/utils.py
+++ b/linkcheck/utils.py
@@ -134,7 +134,10 @@ def update_urls(urls, content_type, object_id):
 
         if len(url) > MAX_URL_LENGTH:
             # We cannot handle url longer than MAX_URL_LENGTH at the moment
-            logger.warning("URL exceeding max length will be skipped: %s", url)
+            if url.startswith("data:"):
+                # If the URL is a data URL, it might occupy a LOT of space in the logs without being useful – truncate it
+                url = url[:64]
+            logger.warning("URL exceeding max length will be skipped: %s  (in %r)", url, instance)
             continue
 
         url, url_created = Url.objects.get_or_create(url=url)