diff --git a/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/cache/PackageCacheManager.java b/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/cache/PackageCacheManager.java
index 85d2bb0bf..0ddd70115 100644
--- a/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/cache/PackageCacheManager.java
+++ b/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/cache/PackageCacheManager.java
@@ -186,8 +186,8 @@ public class PackageCacheManager {
     }
   }
 
-  private static final String PRIMARY_SERVER = "http://packages.fhir.org";
-  private static final String SECONDARY_SERVER = "http://packages2.fhir.org/packages";
+  public static final String PRIMARY_SERVER = "http://packages.fhir.org";
+  public static final String SECONDARY_SERVER = "http://packages2.fhir.org/packages";
 //  private static final String SECONDARY_SERVER = "http://local.fhir.org:960/packages";
   public static final String PACKAGE_REGEX = "^[a-z][a-z0-9\\_\\-]*(\\.[a-z0-9\\_\\-]+)+$";
   public static final String PACKAGE_VERSION_REGEX = "^[a-z][a-z0-9\\_\\-]*(\\.[a-z0-9\\_\\-]+)+\\#[a-z0-9\\-\\_]+(\\.[a-z0-9\\-\\_]+)*$";
diff --git a/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/packages/PackageValidator.java b/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/packages/PackageValidator.java
new file mode 100644
index 000000000..42d5df892
--- /dev/null
+++ b/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/packages/PackageValidator.java
@@ -0,0 +1,68 @@
+package org.hl7.fhir.validation.packages;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.List;
+
+import org.hl7.fhir.exceptions.FHIRException;
+import org.hl7.fhir.exceptions.FHIRFormatError;
+import org.hl7.fhir.r5.context.IWorkerContext;
+import org.hl7.fhir.r5.context.SimpleWorkerContext;
+import org.hl7.fhir.utilities.VersionUtilities;
+import org.hl7.fhir.utilities.cache.NpmPackage;
+import org.hl7.fhir.utilities.cache.PackageCacheManager;
+import org.hl7.fhir.utilities.cache.PackageClient;
+import org.hl7.fhir.utilities.cache.PackageClient.PackageInfo;
+import org.xml.sax.InputSource;
+import org.hl7.fhir.utilities.cache.ToolsVersion;
+
+public class PackageValidator {
+
+  public static void main(String[] args) throws IOException {
+    new PackageValidator().execute();
+  }
+
+  private void execute() throws IOException {
+    PackageCacheManager pcm = new  PackageCacheManager(true, ToolsVersion.TOOLS_VERSION);
+    
+    PackageClient pc = new PackageClient(PackageCacheManager.PRIMARY_SERVER);
+    for (PackageInfo t : pc.search(null, null, null, false)) {
+      System.out.println("Check Package "+t.getId());
+      List<PackageInfo> vl = pc.getVersions(t.getId());
+      PackageInfo v = vl.get(vl.size()-1);
+      System.out.println(" v"+v.getVersion());
+      try {
+        NpmPackage pi = pcm.loadPackage(v.getId(), v.getVersion());        
+        if (VersionUtilities.isR4Ver(pi.fhirVersion()) || VersionUtilities.isR3Ver(pi.fhirVersion()) || VersionUtilities.isR2Ver(pi.fhirVersion())) {
+          for (String n : pi.list("package")) {
+            if (n.endsWith(".json") && !n.equals("ig-r4.json")) {
+              InputStream s = pi.load("package", n);
+              try {
+                parseResource(s, pi.fhirVersion());
+              } catch (Exception e) {
+                System.out.println("  error parsing "+n+" for "+pi.fhirVersion()+": "+e.getMessage());
+              }
+            }
+          }
+        } else {
+          System.out.println("  Unsupported FHIR version "+pi.fhirVersion());
+        }
+      } catch (Exception e) {
+        System.out.println("  Error - no FHIR version");
+      }
+    }
+  }
+
+  private Object parseResource(InputStream s, String fhirVersion) throws FHIRFormatError, IOException {
+    if (VersionUtilities.isR4Ver((fhirVersion))) {
+      return new org.hl7.fhir.r4.formats.JsonParser().parse(s);
+    }
+    if (VersionUtilities.isR3Ver((fhirVersion))) {
+      return new org.hl7.fhir.dstu3.formats.JsonParser().parse(s);
+    }
+    if (VersionUtilities.isR2Ver((fhirVersion))) {
+      return new org.hl7.fhir.dstu2.formats.JsonParser().parse(s);
+    }
+    throw new FHIRException("Unknown version "+fhirVersion);
+  }
+}