diff --git a/gallery_dl/extractor/3dbooru.py b/gallery_dl/extractor/3dbooru.py
index 665c1e01..c303a6d4 100644
--- a/gallery_dl/extractor/3dbooru.py
+++ b/gallery_dl/extractor/3dbooru.py
@@ -14,7 +14,7 @@ info = {
     "category": "3dbooru",
     "extractor": "ThreeDeeBooruExtractor",
     "directory": ["{category}", "{tags}"],
-    "filename": "{category}_{id}_{name}",
+    "filename": "{category}_{id}_{md5}.{extension}",
     "pattern": [
         r"(?:https?://)?(?:www\.)?behoimi\.org/post(?:/(?:index)?)?\?tags=([^&]+).*",
     ],
diff --git a/gallery_dl/extractor/booru.py b/gallery_dl/extractor/booru.py
index 850285cd..d59416b4 100644
--- a/gallery_dl/extractor/booru.py
+++ b/gallery_dl/extractor/booru.py
@@ -53,16 +53,18 @@ class BooruExtractor(Extractor):
         """Collect metadata for extractor-job"""
         return {
             "category": self.info["category"],
-            "tags": self.tags.replace("/", "_"),
+            "tags": self.tags
         }
 
     def get_file_metadata(self, data):
         """Collect metadata for a downloadable file"""
         data["category"] = self.info["category"]
-        data["name"] = text.unquote(
+        data["filename"] = text.unquote(
             text.filename_from_url(self.get_file_url(data))
         )
-        data["extension"] = os.path.splitext(data["name"])[1][1:]
+        name, ext = os.path.splitext(data["filename"])
+        data["name"] = name
+        data["extension"] = ext[1:]
         return data
 
     def get_file_url(self, data):
diff --git a/gallery_dl/extractor/danbooru.py b/gallery_dl/extractor/danbooru.py
index 5024020f..47765d21 100644
--- a/gallery_dl/extractor/danbooru.py
+++ b/gallery_dl/extractor/danbooru.py
@@ -14,7 +14,7 @@ info = {
     "category": "danbooru",
     "extractor": "DanbooruExtractor",
     "directory": ["{category}", "{tags}"],
-    "filename": "{category}_{name}",
+    "filename": "{category}_{id}_{md5}.{extension}",
     "pattern": [
         r"(?:https?://)?(?:www\.)?danbooru.donmai.us/posts\?(?:utf8=%E2%9C%93&)?tags=([^&]+).*",
     ],
diff --git a/gallery_dl/extractor/e621.py b/gallery_dl/extractor/e621.py
index af4971e8..7b808f44 100644
--- a/gallery_dl/extractor/e621.py
+++ b/gallery_dl/extractor/e621.py
@@ -14,7 +14,7 @@ info = {
     "category": "e621",
     "extractor": "E621Extractor",
     "directory": ["{category}", "{tags}"],
-    "filename": "{category}_{name}",
+    "filename": "{category}_{id}_{md5}.{extension}",
     "pattern": [
         r"(?:https?://)?(?:www\.)?e621\.net/post/index/\d+/([^?]+)",
         r"(?:https?://)?(?:www\.)?e621\.net/post\?tags=([^&]+).*"
diff --git a/gallery_dl/extractor/gelbooru.py b/gallery_dl/extractor/gelbooru.py
index e5c4f8e7..11a67f0c 100644
--- a/gallery_dl/extractor/gelbooru.py
+++ b/gallery_dl/extractor/gelbooru.py
@@ -15,7 +15,7 @@ info = {
     "category": "gelbooru",
     "extractor": "GelbooruExtractor",
     "directory": ["{category}", "{tags}"],
-    "filename": "{category}_{name}",
+    "filename": "{category}_{id}_{md5}.{extension}",
     "pattern": [
         r"(?:https?://)?(?:www\.)?gelbooru\.com/(?:index\.php)?\?page=post&s=list&tags=([^&]+).*",
     ],
diff --git a/gallery_dl/extractor/konachan.py b/gallery_dl/extractor/konachan.py
index 523d28f7..63df2398 100644
--- a/gallery_dl/extractor/konachan.py
+++ b/gallery_dl/extractor/konachan.py
@@ -14,7 +14,7 @@ info = {
     "category": "konachan",
     "extractor": "KonachanExtractor",
     "directory": ["{category}", "{tags}"],
-    "filename": "{category}_{md5}.{extension}",
+    "filename": "{category}_{id}_{md5}.{extension}",
     "pattern": [
         r"(?:https?://)?(?:www\.)?konachan\.com/post\?tags=([^&]+).*",
     ],
diff --git a/gallery_dl/extractor/safebooru.py b/gallery_dl/extractor/safebooru.py
index 29ab811d..695fc760 100644
--- a/gallery_dl/extractor/safebooru.py
+++ b/gallery_dl/extractor/safebooru.py
@@ -14,7 +14,7 @@ info = {
     "category": "safebooru",
     "extractor": "SafebooruExtractor",
     "directory": ["{category}", "{tags}"],
-    "filename": "{category}_{name}",
+    "filename": "{category}_{id}_{md5}.{extension}",
     "pattern": [
         r"(?:https?://)?(?:www\.)?safebooru\.org/(?:index\.php)?\?page=post&s=list&tags=([^&]+).*",
     ],
diff --git a/gallery_dl/extractor/yandere.py b/gallery_dl/extractor/yandere.py
index 95843176..cd58dad1 100644
--- a/gallery_dl/extractor/yandere.py
+++ b/gallery_dl/extractor/yandere.py
@@ -14,7 +14,7 @@ info = {
     "category": "yandere",
     "extractor": "YandereExtractor",
     "directory": ["{category}", "{tags}"],
-    "filename": "{category}_{md5}.{extension}",
+    "filename": "{category}_{id}_{md5}.{extension}",
     "pattern": [
         r"(?:https?://)?(?:www\.)?yande\.re/post\?tags=([^&]+).*",
     ],