diff --git a/src/main/java/no/nav/fpsak/nare/doc/BasicRuleDescription.java b/src/main/java/no/nav/fpsak/nare/doc/BasicRuleDescription.java
index a426b66..4a17a63 100644
--- a/src/main/java/no/nav/fpsak/nare/doc/BasicRuleDescription.java
+++ b/src/main/java/no/nav/fpsak/nare/doc/BasicRuleDescription.java
@@ -10,6 +10,7 @@
 import com.fasterxml.jackson.annotation.JsonInclude.Include;
 
 import no.nav.fpsak.nare.evaluation.Operator;
+import no.nav.fpsak.nare.json.JsonOutput;
 
 @JsonInclude(Include.NON_NULL)
 public class BasicRuleDescription implements RuleDescription {
diff --git a/src/main/java/no/nav/fpsak/nare/doc/JsonOutput.java b/src/main/java/no/nav/fpsak/nare/doc/JsonOutput.java
deleted file mode 100644
index fe1e145..0000000
--- a/src/main/java/no/nav/fpsak/nare/doc/JsonOutput.java
+++ /dev/null
@@ -1,56 +0,0 @@
-package no.nav.fpsak.nare.doc;
-
-import java.io.IOException;
-import java.io.StringWriter;
-import java.time.LocalDate;
-import java.time.LocalDateTime;
-import java.time.format.DateTimeFormatter;
-
-import com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility;
-import com.fasterxml.jackson.annotation.PropertyAccessor;
-import com.fasterxml.jackson.databind.DeserializationFeature;
-import com.fasterxml.jackson.databind.ObjectMapper;
-import com.fasterxml.jackson.databind.SerializationFeature;
-import com.fasterxml.jackson.databind.module.SimpleModule;
-import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
-import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateSerializer;
-import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
-import com.fasterxml.jackson.datatype.jdk8.Jdk8Module;
-
-public class JsonOutput {
-    private static final ObjectMapper OM;
-    static {
-        OM = new ObjectMapper();
-
-        OM.registerModule(new JavaTimeModule());
-        OM.registerModule(new Jdk8Module());
-        SimpleModule module = new SimpleModule();
-        
-        OM.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
-        OM.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
-        
-        module.addSerializer(LocalDate.class, new LocalDateSerializer(DateTimeFormatter.ISO_LOCAL_DATE));
-        module.addSerializer(LocalDateTime.class, new LocalDateTimeSerializer(DateTimeFormatter.ISO_LOCAL_DATE_TIME));
-
-        // TODO: Mangler Deserializer for LocalDateTimeline og LocalDateInterval
-
-        OM.setVisibility(PropertyAccessor.GETTER, Visibility.NONE);
-        OM.setVisibility(PropertyAccessor.SETTER, Visibility.NONE);
-        OM.setVisibility(PropertyAccessor.FIELD, Visibility.ANY);
-
-        OM.registerModule(module);
-
-    }
-    
-    public static String asJson(Object obj) {
-
-        StringWriter sw = new StringWriter(1000);
-
-        try {
-            OM.writerWithDefaultPrettyPrinter().writeValue(sw, obj);
-        } catch (IOException e) {
-            throw new IllegalArgumentException(String.format("Kunne ikke serialiseres til json: %s", obj), e);
-        }
-        return sw.toString();
-    }
-}
diff --git a/src/main/java/no/nav/fpsak/nare/doc/RuleDescriptionDigraph.java b/src/main/java/no/nav/fpsak/nare/doc/RuleDescriptionDigraph.java
index 20b8940..eb81645 100644
--- a/src/main/java/no/nav/fpsak/nare/doc/RuleDescriptionDigraph.java
+++ b/src/main/java/no/nav/fpsak/nare/doc/RuleDescriptionDigraph.java
@@ -8,9 +8,9 @@
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
-import com.fasterxml.jackson.core.Version;
 
 import no.nav.fpsak.nare.evaluation.Operator;
+import no.nav.fpsak.nare.json.JsonOutput;
 
 @JsonIgnoreProperties(ignoreUnknown = true)
 public class RuleDescriptionDigraph {
diff --git a/src/main/java/no/nav/fpsak/nare/json/JsonOutput.java b/src/main/java/no/nav/fpsak/nare/json/JsonOutput.java
new file mode 100644
index 0000000..0a92c2f
--- /dev/null
+++ b/src/main/java/no/nav/fpsak/nare/json/JsonOutput.java
@@ -0,0 +1,53 @@
+package no.nav.fpsak.nare.json;
+
+import com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility;
+import com.fasterxml.jackson.annotation.PropertyAccessor;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializationFeature;
+import com.fasterxml.jackson.datatype.jdk8.Jdk8Module;
+import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
+
+public class JsonOutput {
+
+    private static final ObjectMapper MAPPER = createObjectMapper();
+
+
+    private JsonOutput() {
+    }
+
+    public static String asJson(Object obj) {
+        try {
+            return MAPPER.writerWithDefaultPrettyPrinter().writeValueAsString(obj);
+        } catch (JsonProcessingException e) {
+            throw mapException(obj, e);
+        }
+    }
+
+    public static String asCompactJson(Object obj) {
+        try {
+            return MAPPER.writeValueAsString(obj);
+        } catch (JsonProcessingException e) {
+            throw mapException(obj, e);
+        }
+    }
+
+    private static NareJsonException mapException(Object obj, JsonProcessingException e) {
+        return new NareJsonException(String.format("Kunne ikke serialiseres til json: %s", obj), e);
+    }
+
+    private static ObjectMapper createObjectMapper() {
+        var om = new ObjectMapper();
+        om.registerModule(new JavaTimeModule());
+        om.registerModule(new Jdk8Module());
+        om.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
+        om.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
+        om.setVisibility(PropertyAccessor.GETTER, Visibility.NONE);
+        om.setVisibility(PropertyAccessor.SETTER, Visibility.NONE);
+        om.setVisibility(PropertyAccessor.IS_GETTER, Visibility.NONE);
+        om.setVisibility(PropertyAccessor.FIELD, Visibility.ANY);
+        om.setVisibility(PropertyAccessor.CREATOR, Visibility.ANY);
+        return om;
+    }
+}
diff --git a/src/main/java/no/nav/fpsak/nare/json/NareJsonException.java b/src/main/java/no/nav/fpsak/nare/json/NareJsonException.java
new file mode 100644
index 0000000..4e6ed94
--- /dev/null
+++ b/src/main/java/no/nav/fpsak/nare/json/NareJsonException.java
@@ -0,0 +1,13 @@
+package no.nav.fpsak.nare.json;
+
+public class NareJsonException extends RuntimeException {
+
+    public NareJsonException(String message) {
+        super(message);
+    }
+
+    public NareJsonException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+}
diff --git a/src/main/java/no/nav/fpsak/nare/specification/AbstractSpecification.java b/src/main/java/no/nav/fpsak/nare/specification/AbstractSpecification.java
index 8188912..f26a50b 100644
--- a/src/main/java/no/nav/fpsak/nare/specification/AbstractSpecification.java
+++ b/src/main/java/no/nav/fpsak/nare/specification/AbstractSpecification.java
@@ -3,12 +3,12 @@
 import java.util.Map;
 import java.util.Optional;
 
-import no.nav.fpsak.nare.doc.JsonOutput;
 import no.nav.fpsak.nare.doc.RuleDescription;
 import no.nav.fpsak.nare.evaluation.Operator;
 import no.nav.fpsak.nare.evaluation.Resultat;
 import no.nav.fpsak.nare.evaluation.RuleReasonRef;
 import no.nav.fpsak.nare.evaluation.node.SingleEvaluation;
+import no.nav.fpsak.nare.json.JsonOutput;
 
 public abstract class AbstractSpecification<T> implements Specification<T> {
     private String beskrivelse = "";
diff --git a/src/main/java/no/nav/fpsak/nare/specification/ConditionalOrSpecification.java b/src/main/java/no/nav/fpsak/nare/specification/ConditionalOrSpecification.java
index 94b981b..bd5ff98 100644
--- a/src/main/java/no/nav/fpsak/nare/specification/ConditionalOrSpecification.java
+++ b/src/main/java/no/nav/fpsak/nare/specification/ConditionalOrSpecification.java
@@ -8,7 +8,6 @@
 import java.util.stream.Collectors;
 
 import no.nav.fpsak.nare.doc.BasicRuleDescription;
-import no.nav.fpsak.nare.doc.JsonOutput;
 import no.nav.fpsak.nare.doc.RuleDescription;
 import no.nav.fpsak.nare.evaluation.Evaluation;
 import no.nav.fpsak.nare.evaluation.Operator;
@@ -16,6 +15,7 @@
 import no.nav.fpsak.nare.evaluation.RuleReasonRef;
 import no.nav.fpsak.nare.evaluation.node.ConditionalElseEvaluation;
 import no.nav.fpsak.nare.evaluation.node.ConditionalOrEvaluation;
+import no.nav.fpsak.nare.json.JsonOutput;
 
 /**
  * Conditional Or specification, used to create a new specifcation that is the