diff --git a/scripts/jsonDECP2xmlDECP.sh b/scripts/jsonDECP2xmlDECP.sh
index 6300072..93c54cf 100755
--- a/scripts/jsonDECP2xmlDECP.sh
+++ b/scripts/jsonDECP2xmlDECP.sh
@@ -1,4 +1,40 @@
 #!/bin/bash
+source=$1
 
-# Ce script convertit les données DECP JSON en DECP XML
-json2xml.py $1 | xsltproc scripts/xslt/postJsonConversion.xsl - | xmllint --format --encode utf-8 -
+length=`jq -r '.marches | length' $source`
+chunk_size=30000
+
+start_range=0
+end_range=$chunk_size
+
+# Bash always floors the result of divisions to the lower integer. 3/2 = 1.
+nb_chunks_raw=$(( length / chunk_size ))
+nb_chunks=$(( nb_chunks_raw + 1 ))
+
+echo '<?xml version="1.0" encoding="utf-8"?>
+<marches xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:fn="http://www.w3.org/2005/xpath-functions" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="https://raw.githubusercontent.com/etalab/format-commande-publique/master/marches.xsd">'
+
+while [[ ! $current_chunk -eq $nb_chunks ]]
+do
+  (( current_chunk++ ))
+
+  json=chunk_$current_chunk.json
+  jq --arg startr $start_range --arg endr $end_range '{"marches":.marches[$startr|tonumber:$endr|tonumber]}' $source | \
+    
+    # JSON to generic XML structure
+    json2xml.py | \
+    
+    # Generic XML structure to DECP XML
+    xsltproc scripts/xslt/postJsonConversion.xsl - | \
+    
+    # Indentation
+    xmllint --format --encode utf-8 - | \
+    
+    # Filter out XML declaration and nesting element as we feed a file that has them already
+    grep -v "^<?xml" | grep -vE "^<(\/)?marches"
+
+  end_range=$(( end_range + chunk_size ))
+  start_range=$(( start_range + chunk_size ))
+done
+
+echo "</marches>"