diff --git a/run/reconvert.sh b/run/reconvert.sh
index 468ff2b3..608d7448 100755
--- a/run/reconvert.sh
+++ b/run/reconvert.sh
@@ -85,5 +85,6 @@ converter-process ${SAMPLE_DIR}/plan.yaml
 loader-process ${SAMPLE_DIR}/plan.yaml
 
 mv vol/iw/index.dat vol/iw/0/page-index.dat
+rm -f vol/ir/0/*
 
 popd
diff --git a/services-core/index-service/src/main/java/nu/marginalia/index/IndexService.java b/services-core/index-service/src/main/java/nu/marginalia/index/IndexService.java
index c6552c18..4b4476e9 100644
--- a/services-core/index-service/src/main/java/nu/marginalia/index/IndexService.java
+++ b/services-core/index-service/src/main/java/nu/marginalia/index/IndexService.java
@@ -7,26 +7,34 @@ import io.reactivex.rxjava3.schedulers.Schedulers;
 import nu.marginalia.index.index.SearchIndex;
 import nu.marginalia.index.svc.IndexOpsService;
 import nu.marginalia.index.svc.IndexQueryService;
+import nu.marginalia.index.svc.IndexSearchSetsService;
 import nu.marginalia.model.gson.GsonFactory;
 import nu.marginalia.service.server.Initialization;
 import nu.marginalia.service.server.MetricsServer;
 import nu.marginalia.service.server.Service;
 import org.jetbrains.annotations.NotNull;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import spark.Request;
 import spark.Response;
 import spark.Spark;
 
+import java.io.IOException;
 import java.util.concurrent.TimeUnit;
 
 import static spark.Spark.get;
 
 public class IndexService extends Service {
+    private final Logger logger = LoggerFactory.getLogger(getClass());
 
     @NotNull
     private final Initialization init;
     private final IndexOpsService opsService;
     private final SearchIndex searchIndex;
 
+    private final IndexServicesFactory servicesFactory;
+    private final IndexSearchSetsService searchSetsService;
+
 
     @Inject
     public IndexService(@Named("service-host") String ip,
@@ -35,12 +43,15 @@ public class IndexService extends Service {
                         MetricsServer metricsServer,
                         IndexOpsService opsService,
                         IndexQueryService indexQueryService,
-                        SearchIndex searchIndex
-                            )
+                        SearchIndex searchIndex,
+                        IndexServicesFactory servicesFactory,
+                        IndexSearchSetsService searchSetsService)
     {
         super(ip, port, init, metricsServer);
         this.opsService = opsService;
         this.searchIndex = searchIndex;
+        this.servicesFactory = servicesFactory;
+        this.searchSetsService = searchSetsService;
 
         final Gson gson = GsonFactory.get();
 
@@ -61,6 +72,7 @@ public class IndexService extends Service {
     }
 
     volatile boolean initialized = false;
+
     public void initialize() {
         if (!initialized) {
             init.waitReady();
@@ -68,6 +80,22 @@ public class IndexService extends Service {
             initialized = true;
         }
 
+        if (!opsService.run(this::autoConvert)) {
+            logger.warn("Auto-convert could not be performed, ops lock busy");
+        }
+    }
+
+    private void autoConvert() {
+        if (!servicesFactory.isConvertedIndexMissing() || !servicesFactory.isPreconvertedIndexPresent()) {
+            return;
+        }
+        try {
+            searchSetsService.recalculateAll();
+            searchIndex.switchIndex();
+        }
+        catch (IOException ex) {
+            logger.error("Auto convert failed", ex);
+        }
     }
 
 
diff --git a/services-core/index-service/src/main/java/nu/marginalia/index/IndexServicesFactory.java b/services-core/index-service/src/main/java/nu/marginalia/index/IndexServicesFactory.java
index 9b33cb8a..05de1c08 100644
--- a/services-core/index-service/src/main/java/nu/marginalia/index/IndexServicesFactory.java
+++ b/services-core/index-service/src/main/java/nu/marginalia/index/IndexServicesFactory.java
@@ -20,7 +20,9 @@ import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.StandardCopyOption;
+import java.util.List;
 import java.util.concurrent.Callable;
+import java.util.stream.Stream;
 
 @Singleton
 public class IndexServicesFactory {
@@ -42,6 +44,7 @@ public class IndexServicesFactory {
     int LIVE_PART = 0;
 
     int NEXT_PART = 1;
+
     @Inject
     public IndexServicesFactory(
             @Named("tmp-file-dir") Path tmpFileDir,
@@ -72,6 +75,28 @@ public class IndexServicesFactory {
         return searchSetsBase;
     }
 
+    public boolean isPreconvertedIndexPresent() {
+        return Stream.of(
+                revIndexWords.get(NEXT_PART).toPath(),
+                revIndexDoc.get(NEXT_PART).toPath(),
+                revPrioIndexWords.get(NEXT_PART).toPath(),
+                revPrioIndexDoc.get(NEXT_PART).toPath(),
+                fwdIndexDocData.get(NEXT_PART).toPath(),
+                fwdIndexDocId.get(NEXT_PART).toPath()
+        ).allMatch(Files::exists);
+    }
+
+    public boolean isConvertedIndexMissing() {
+        return !Stream.of(
+                revIndexWords.get(LIVE_PART).toPath(),
+                revIndexDoc.get(LIVE_PART).toPath(),
+                revPrioIndexWords.get(LIVE_PART).toPath(),
+                revPrioIndexDoc.get(LIVE_PART).toPath(),
+                fwdIndexDocData.get(LIVE_PART).toPath(),
+                fwdIndexDocId.get(LIVE_PART).toPath()
+        ).allMatch(Files::exists);
+    }
+
     public void convertIndex(DomainRankings domainRankings) throws IOException {
         convertForwardIndex(domainRankings);
         convertFullReverseIndex(domainRankings);
diff --git a/services-core/index-service/src/main/java/nu/marginalia/index/index/SearchIndex.java b/services-core/index-service/src/main/java/nu/marginalia/index/index/SearchIndex.java
index b5b4677c..b6be4ef4 100644
--- a/services-core/index-service/src/main/java/nu/marginalia/index/index/SearchIndex.java
+++ b/services-core/index-service/src/main/java/nu/marginalia/index/index/SearchIndex.java
@@ -31,7 +31,7 @@ public class SearchIndex {
 
     @NotNull
     private final IndexServicesFactory servicesFactory;
-    private IndexSearchSetsService searchSetsService;
+    private final IndexSearchSetsService searchSetsService;
 
     @Inject
     public SearchIndex(@NotNull IndexServicesFactory servicesFactory, IndexSearchSetsService searchSetsService) {
diff --git a/services-core/index-service/src/main/java/nu/marginalia/index/svc/IndexOpsService.java b/services-core/index-service/src/main/java/nu/marginalia/index/svc/IndexOpsService.java
index 36561dc7..34ed2927 100644
--- a/services-core/index-service/src/main/java/nu/marginalia/index/svc/IndexOpsService.java
+++ b/services-core/index-service/src/main/java/nu/marginalia/index/svc/IndexOpsService.java
@@ -48,7 +48,7 @@ public class IndexOpsService {
 
 
     @CheckReturnValue
-    private <T> Optional<T> run(Callable<T> c) throws Exception {
+    public <T> Optional<T> run(Callable<T> c) throws Exception {
         if (!opsLock.tryLock())
             return Optional.empty();
         try {
@@ -61,7 +61,7 @@ public class IndexOpsService {
 
 
     @CheckReturnValue
-    private boolean run(Runnable r) {
+    public boolean run(Runnable r) {
         if (!opsLock.tryLock())
             return false;
         try {