diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index c9bc60d5f..b43e6b7ad 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -33,9 +33,7 @@ module ApplicationHelper
   end
 
   def format_text(text, **options)
-    raw DTextRagel.parse(text, **options)
-  rescue DTextRagel::Error => e
-    raw ""
+    raw DText.format_text(text, **options)
   end
 
   def strip_dtext(text)
diff --git a/app/javascript/src/styles/common/dtext.scss b/app/javascript/src/styles/common/dtext.scss
index 15f0d2d24..d51cb8c7b 100644
--- a/app/javascript/src/styles/common/dtext.scss
+++ b/app/javascript/src/styles/common/dtext.scss
@@ -108,6 +108,10 @@ div.prose {
     padding: 0 0.2em 0 0.3em;
     vertical-align: 1px;
   }
+
+  a.dtext-wiki-does-not-exist, a.dtext-tag-does-not-exist {
+    text-decoration: dotted underline;
+  }
 }
 
 // avoid empty gaps beneath dtext blocks in table rows.
diff --git a/app/logical/d_text.rb b/app/logical/d_text.rb
index ad9d31eae..f93699beb 100644
--- a/app/logical/d_text.rb
+++ b/app/logical/d_text.rb
@@ -4,6 +4,54 @@ require 'uri'
 class DText
   MENTION_REGEXP = /(?<=^| )@\S+/
 
+  def self.format_text(text, data: nil, **options)
+    data = preprocess([text]) if data.nil?
+    html = DTextRagel.parse(text, **options)
+    html = postprocess(html, *data)
+    html
+  rescue DTextRagel::Error => e
+    ""
+  end
+
+  def self.preprocess(dtext_messages)
+    names = dtext_messages.map { |message| parse_wiki_titles(message) }.flatten.uniq
+    wiki_pages = WikiPage.where(title: names)
+    tags = Tag.where(name: names)
+
+    [wiki_pages, tags]
+  end
+
+  def self.postprocess(html, wiki_pages, tags)
+    fragment = Nokogiri::HTML.fragment(html)
+
+    fragment.css("a.dtext-wiki-link").each do |node|
+      name = node["href"][%r!\A/wiki_pages/show_or_new\?title=(.*)\z!i, 1]
+      name = CGI.unescape(name)
+      name = WikiPage.normalize_title(name)
+      wiki = wiki_pages.find { |wiki| wiki.title == name }
+      tag = tags.find { |tag| tag.name == name }
+
+      if wiki.blank?
+        node["class"] += " dtext-wiki-does-not-exist"
+        node["title"] = "This wiki page does not exist"
+      end
+
+      if WikiPage.is_meta_wiki?(name)
+        # skip (meta wikis aren't expected to have a tag)
+      elsif tag.blank?
+        node["class"] += " dtext-tag-does-not-exist"
+        node["title"] = "This wiki page does not have a tag"
+      elsif tag.post_count <= 0
+        node["class"] += " dtext-tag-empty"
+        node["title"] = "This wiki page does not have a tag"
+      else
+        node["class"] += " tag-type-#{tag.category}"
+      end
+    end
+
+    fragment.to_s
+  end
+
   def self.quote(message, creator_name)
     stripped_body = DText.strip_blocks(message, "quote")
     "[quote]\n#{creator_name} said:\n\n#{stripped_body}\n[/quote]\n\n"
diff --git a/app/models/wiki_page.rb b/app/models/wiki_page.rb
index 236bb24cf..8e3c50e7e 100644
--- a/app/models/wiki_page.rb
+++ b/app/models/wiki_page.rb
@@ -1,6 +1,8 @@
 class WikiPage < ApplicationRecord
   class RevertError < Exception ; end
 
+  META_WIKIS = ["list_of_", "tag_group:", "pool_group:", "howto:", "about:", "help:", "template:"]
+
   before_save :normalize_title
   before_save :normalize_other_names
   after_save :create_version
@@ -155,6 +157,10 @@ class WikiPage < ApplicationRecord
     title.tr("_", " ")
   end
 
+  def self.is_meta_wiki?(title)
+    title.starts_with?(*META_WIKIS)
+  end
+
   def wiki_page_changed?
     saved_change_to_title? || saved_change_to_body? || saved_change_to_is_locked? || saved_change_to_is_deleted? || saved_change_to_other_names?
   end
diff --git a/app/views/comments/_index_by_comment.html.erb b/app/views/comments/_index_by_comment.html.erb
index 03a321ed4..0ec786a7b 100644
--- a/app/views/comments/_index_by_comment.html.erb
+++ b/app/views/comments/_index_by_comment.html.erb
@@ -8,7 +8,7 @@
               <%= link_to(image_tag(comment.post.preview_file_url), post_path(comment.post)) %>
             <% end %>
           </div>
-          <%= render :partial => "comments/partials/show/comment", :collection => [comment] %>
+          <%= render partial: "comments/partials/show/comment", collection: [comment], locals: { dtext_data: DText.preprocess(@comments.map(&:body)) } %>
         <% end %>
       <% end %>
     <% end %>
diff --git a/app/views/comments/index_for_post.js.erb b/app/views/comments/index_for_post.js.erb
index 504ac10c1..0c0d584ff 100644
--- a/app/views/comments/index_for_post.js.erb
+++ b/app/views/comments/index_for_post.js.erb
@@ -1,5 +1,5 @@
 $("#threshold-comments-notice-for-<%= @post.id %>").hide();
 
 var current_comment_section = $("div.comments-for-post[data-post-id=<%= @post.id %>] div.list-of-comments");
-current_comment_section.html("<%= j(render(:partial => 'comments/partials/show/comment', :collection => @comments))%>");
+current_comment_section.html("<%= j(render(partial: 'comments/partials/show/comment', collection: @comments, locals: { dtext_data: DText.preprocess(@comments.map(&:body)) })) %>");
 $(window).trigger("danbooru:index_for_post", [<%= @post.id %>]);
diff --git a/app/views/comments/partials/index/_list.html.erb b/app/views/comments/partials/index/_list.html.erb
index a7a712058..d8e816947 100644
--- a/app/views/comments/partials/index/_list.html.erb
+++ b/app/views/comments/partials/index/_list.html.erb
@@ -13,7 +13,7 @@
 
   <div class="list-of-comments list-of-messages">
     <% if comments.present? %>
-      <%= render partial: "comments/partials/show/comment", collection: comments %>
+      <%= render partial: "comments/partials/show/comment", collection: comments, locals: { dtext_data: DText.preprocess(comments.map(&:body)) } %>
     <% elsif post.last_commented_at.present? %>
       <p>There are no visible comments.</p>
     <% else %>
diff --git a/app/views/comments/partials/show/_comment.html.erb b/app/views/comments/partials/show/_comment.html.erb
index 3db1cc28a..b8571e163 100644
--- a/app/views/comments/partials/show/_comment.html.erb
+++ b/app/views/comments/partials/show/_comment.html.erb
@@ -22,7 +22,7 @@
     </div>
     <div class="content">
       <div class="body prose">
-        <%= format_text(comment.body) %>
+        <%= format_text(comment.body, data: dtext_data) %>
       </div>
       <%= render "application/update_notice", record: comment %>
       
diff --git a/app/views/forum_posts/_forum_post.html.erb b/app/views/forum_posts/_forum_post.html.erb
index da49b2c17..f7cc58ac0 100644
--- a/app/views/forum_posts/_forum_post.html.erb
+++ b/app/views/forum_posts/_forum_post.html.erb
@@ -11,7 +11,7 @@
     </div>
     <div class="content">
       <div class="prose">
-        <%= format_text(parse_embedded_tag_request_text(forum_post.body)) %>
+        <%= format_text(parse_embedded_tag_request_text(forum_post.body), data: dtext_data) %>
       </div>
       <%= render "application/update_notice", record: forum_post %>
       <menu>
diff --git a/app/views/forum_posts/_listing.html.erb b/app/views/forum_posts/_listing.html.erb
index 93d9e3768..0612f2522 100644
--- a/app/views/forum_posts/_listing.html.erb
+++ b/app/views/forum_posts/_listing.html.erb
@@ -1,8 +1,9 @@
 <%- # forum_post %>
 <%- # original_forum_post_id %>
+<%- # dtext_data %>
 
 <div class="list-of-forum-posts list-of-messages">
   <% forum_posts.each do |forum_post| %>
-    <%= render "forum_posts/forum_post", :forum_post => forum_post, :original_forum_post_id => original_forum_post_id %>
+    <%= render "forum_posts/forum_post", forum_post: forum_post, original_forum_post_id: original_forum_post_id, dtext_data: dtext_data %>
   <% end %>
 </div>
diff --git a/app/views/forum_topics/show.html.erb b/app/views/forum_topics/show.html.erb
index 699175cfc..c8d64d5dc 100644
--- a/app/views/forum_topics/show.html.erb
+++ b/app/views/forum_topics/show.html.erb
@@ -20,7 +20,7 @@
       </div>
     <% end %>
 
-    <%= render "forum_posts/listing", :forum_posts => @forum_posts, :original_forum_post_id => @forum_topic.original_post.id %>
+    <%= render "forum_posts/listing", forum_posts: @forum_posts, original_forum_post_id: @forum_topic.original_post.id, dtext_data: DText.preprocess(@forum_posts.map(&:body)) %>
 
     <% if CurrentUser.is_member? %>
       <% if CurrentUser.is_moderator? || !@forum_topic.is_locked? %>
diff --git a/test/unit/d_text_test.rb b/test/unit/d_text_test.rb
index 81c2e61f4..053abc2db 100644
--- a/test/unit/d_text_test.rb
+++ b/test/unit/d_text_test.rb
@@ -38,5 +38,23 @@ class DTextTest < ActiveSupport::TestCase
         assert_strip_dtext("one two three\nfour\n\nfive six", "one [b]two[/b] three\nfour\n\nfive six")
       end
     end
+
+    context "#format_text" do
+      should "add tag types to wiki links" do
+        create(:tag, name: "bkub", category: Tag.categories.artist, post_count: 42)
+        assert_match(/tag-type-#{Tag.categories.artist}/, DText.format_text("[[bkub]]"))
+      end
+
+      should "mark links to nonexistent tags or wikis" do
+        create(:tag, name: "no_wiki", post_count: 42)
+        create(:tag, name: "empty_tag", post_count: 0)
+
+        assert_match(/dtext-wiki-does-not-exist/, DText.format_text("[[no wiki]]"))
+        assert_match(/dtext-tag-does-not-exist/, DText.format_text("[[no tag]]"))
+        assert_match(/dtext-tag-empty/, DText.format_text("[[empty tag]]"))
+
+        refute_match(/dtext-tag-does-not-exist/, DText.format_text("[[help:nothing]]"))
+      end
+    end
   end
 end