diff --git a/gallery_dl/extractor/gelbooru.py b/gallery_dl/extractor/gelbooru.py
index e37b2e92..83f13922 100644
--- a/gallery_dl/extractor/gelbooru.py
+++ b/gallery_dl/extractor/gelbooru.py
@@ -118,7 +118,7 @@ class GelbooruBase():
 class GelbooruTagExtractor(GelbooruBase,
                            gelbooru_v02.GelbooruV02TagExtractor):
     """Extractor for images from gelbooru.com based on search-tags"""
-    pattern = BASE_PATTERN + r"page=post&s=list&tags=([^&#]+)"
+    pattern = BASE_PATTERN + r"page=post&s=list&tags=([^&#]*)"
     example = "https://gelbooru.com/index.php?page=post&s=list&tags=TAG"
 
 
diff --git a/gallery_dl/extractor/gelbooru_v02.py b/gallery_dl/extractor/gelbooru_v02.py
index f8ab71c9..c7866bc4 100644
--- a/gallery_dl/extractor/gelbooru_v02.py
+++ b/gallery_dl/extractor/gelbooru_v02.py
@@ -190,7 +190,7 @@ class GelbooruV02TagExtractor(GelbooruV02Extractor):
     subcategory = "tag"
     directory_fmt = ("{category}", "{search_tags}")
     archive_fmt = "t_{search_tags}_{id}"
-    pattern = BASE_PATTERN + r"/index\.php\?page=post&s=list&tags=([^&#]+)"
+    pattern = BASE_PATTERN + r"/index\.php\?page=post&s=list&tags=([^&#]*)"
     example = "https://safebooru.org/index.php?page=post&s=list&tags=TAG"
 
     def __init__(self, match):
@@ -202,6 +202,8 @@ class GelbooruV02TagExtractor(GelbooruV02Extractor):
         return {"search_tags": self.tags}
 
     def posts(self):
+        if self.tags == "all":
+            self.tags = ""
         return self._pagination({"tags": self.tags})
 
 
diff --git a/test/results/gelbooru.py b/test/results/gelbooru.py
index 8d9ead27..b2f99ed1 100644
--- a/test/results/gelbooru.py
+++ b/test/results/gelbooru.py
@@ -15,6 +15,20 @@ __tests__ = (
     "#count"   : 5,
 },
 
+{
+    "#url"     : "https://gelbooru.com/index.php?page=post&s=list&tags=all",
+    "#category": ("booru", "gelbooru", "tag"),
+    "#class"   : gelbooru.GelbooruTagExtractor,
+    "#range"   : "1-3",
+    "#count"   : 3,
+},
+
+{
+    "#url"     : "https://gelbooru.com/index.php?page=post&s=list&tags=",
+    "#category": ("booru", "gelbooru", "tag"),
+    "#class"   : gelbooru.GelbooruTagExtractor,
+},
+
 {
     "#url"     : "https://gelbooru.com/index.php?page=post&s=list&tags=meiya_neon",
     "#category": ("booru", "gelbooru", "tag"),
diff --git a/test/results/safebooru.py b/test/results/safebooru.py
index 0c183204..f82f9681 100644
--- a/test/results/safebooru.py
+++ b/test/results/safebooru.py
@@ -16,6 +16,20 @@ __tests__ = (
     "#sha1_content": "e5ad4c5bf241b1def154958535bef6c2f6b733eb",
 },
 
+{
+    "#url"     : "https://safebooru.org/index.php?page=post&s=list&tags=all",
+    "#category": ("gelbooru_v02", "safebooru", "tag"),
+    "#class"   : gelbooru_v02.GelbooruV02TagExtractor,
+    "#range"   : "1-3",
+    "#count"   : 3,
+},
+
+{
+    "#url"     : "https://safebooru.org/index.php?page=post&s=list&tags=",
+    "#category": ("gelbooru_v02", "safebooru", "tag"),
+    "#class"   : gelbooru_v02.GelbooruV02TagExtractor,
+},
+
 {
     "#url"     : "https://safebooru.org/index.php?page=pool&s=show&id=11",
     "#category": ("gelbooru_v02", "safebooru", "pool"),