diff --git a/tools/precommit-bib.py b/tools/precommit-bib.py
new file mode 100644
index 0000000000..e4d1174e85
--- /dev/null
+++ b/tools/precommit-bib.py
@@ -0,0 +1,33 @@
+import json
+#TODO do not split {} by ,. We need a more deeper parser!
+bib_list = {}
+with open("qmlcourseRU/_bibliography/references.bib", "r") as bibfile:
+    bibtex = bibfile.readlines()
+    entry_type=None
+    entry=None
+    for line in bibtex:
+        # print(line)
+        line = line.strip() #remove spaces and tabs at start/end of line (trimm string)
+        # print(line)
+        if line.startswith("@"):
+            if entry_type is not None:
+                bib_list[entry_label] = {
+                    #TODO: all variants
+                    "entry_type":entry_type,
+                    "entry_label":entry_label,
+                    "entry":entry,
+                    }
+
+            entry_type, entry = line.split("{")
+            entry_label, entry = entry.split(",")
+            # entry = "{" + entry attepmt to use json.loads()
+        else:
+            entry+=line
+print(bib_list)
+with open("qmlcourseRU/_bibliography/references2.bib", "w") as bibfile:
+    for k, v in bib_list.items():
+        bibfile.writelines(v["entry_type"]+"{"+v["entry_label"]+",\n")
+        split_entry_lines = v["entry"].split("},")
+        for i in split_entry_lines[:-1]:
+            bibfile.writelines(i+"},\n")
+        bibfile.writelines(split_entry_lines[-1]+"\n")