diff --git a/code/common/model/src/main/java/nu/marginalia/model/idx/DocumentFlags.java b/code/common/model/src/main/java/nu/marginalia/model/idx/DocumentFlags.java
index 099d2da8..c0d097df 100644
--- a/code/common/model/src/main/java/nu/marginalia/model/idx/DocumentFlags.java
+++ b/code/common/model/src/main/java/nu/marginalia/model/idx/DocumentFlags.java
@@ -3,10 +3,10 @@ package nu.marginalia.model.idx;
 import java.util.EnumSet;
 
 public enum DocumentFlags {
-    UnusedBit1,
+    Javascript,
     PlainText,
-    UnusedBit2,
-    UnusedBit3,
+    Ads,
+    Tracking,
     UnusedBit4,
     UnusedBit5,
     UnusedBit6,
diff --git a/code/processes/converting-process/src/main/java/nu/marginalia/converting/processor/plugin/HtmlDocumentProcessorPlugin.java b/code/processes/converting-process/src/main/java/nu/marginalia/converting/processor/plugin/HtmlDocumentProcessorPlugin.java
index 26379cf6..d080b535 100644
--- a/code/processes/converting-process/src/main/java/nu/marginalia/converting/processor/plugin/HtmlDocumentProcessorPlugin.java
+++ b/code/processes/converting-process/src/main/java/nu/marginalia/converting/processor/plugin/HtmlDocumentProcessorPlugin.java
@@ -5,6 +5,7 @@ import com.google.inject.name.Named;
 import nu.marginalia.converting.processor.MetaRobotsTag;
 import nu.marginalia.converting.processor.logic.dom.DomPruningFilter;
 import nu.marginalia.converting.processor.logic.links.LinkProcessor;
+import nu.marginalia.model.crawl.HtmlFeature;
 import nu.marginalia.summary.SummaryExtractor;
 import nu.marginalia.link_parser.LinkParser;
 import nu.marginalia.crawling.model.CrawledDocument;
@@ -125,7 +126,9 @@ public class HtmlDocumentProcessorPlugin extends AbstractDocumentProcessorPlugin
         ret.hashCode = dld.localitySensitiveHashCode();
 
         PubDate pubDate = pubDateSniffer.getPubDate(crawledDocument.headers, url, doc, ret.standard, true);
-        ret.metadata = new DocumentMetadata(url.depth(), pubDate.yearByte(), 0, (int) -ret.quality, EnumSet.noneOf(DocumentFlags.class));
+        EnumSet<DocumentFlags> documentFlags = htmlFeatures2DocumentFlags(ret.features);
+
+        ret.metadata = new DocumentMetadata(url.depth(), pubDate.yearByte(), 0, (int) -ret.quality, documentFlags);
 
         DocumentKeywordsBuilder words = keywordExtractor.extractKeywords(dld, url);
 
@@ -148,6 +151,22 @@ public class HtmlDocumentProcessorPlugin extends AbstractDocumentProcessorPlugin
         return new DetailsWithWords(ret, words);
     }
 
+    private EnumSet<DocumentFlags> htmlFeatures2DocumentFlags(Set<HtmlFeature> features) {
+        EnumSet<DocumentFlags> flags = EnumSet.noneOf(DocumentFlags.class);
+
+        if (features.contains(HtmlFeature.ADVERTISEMENT)) {
+            flags.add(DocumentFlags.Ads);
+        }
+        if (features.contains(HtmlFeature.JS)) {
+            flags.add(DocumentFlags.Javascript);
+        }
+        if (features.contains(HtmlFeature.TRACKING)) {
+            flags.add(DocumentFlags.Tracking);
+        }
+
+        return flags;
+    }
+
     private Document prune(Document doc) {
         final var prunedDoc = doc.clone();