diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 71fe4a0..9deb070 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -4,6 +4,7 @@ Changelog
 
 current (2022-XX-XX)
 --------------------
+* Introduce OMIT_NONE_FIELDS in JSONCompiler class to ease removing / keeping none values in the metadata. By default None values are kept. (#72)[https://github.com/OpenEnergyPlatform/omi/pull/72]
 
 0.1.2 (2023-01-27)
 --------------------
diff --git a/docs/oep_metadata.rst b/docs/oep_metadata.rst
index 19b926e..05dd42e 100644
--- a/docs/oep_metadata.rst
+++ b/docs/oep_metadata.rst
@@ -50,5 +50,6 @@ new metadata format by using the respective dialect
 .. doctest::
 
     >>> dialect1_4 = OEP_V_1_4_Dialect()
+    >>> dialect1_4._compiler.OMIT_NONE_FIELDS = True
     >>> dialect1_4.compile(parsed)
     {'id': 'unique_id', 'metaMetadata': {'metadataVersion': 'OEP-1.4.0', 'metadataLicense': {'name': 'CC0-1.0', 'title': 'Creative Commons Zero v1.0 Universal', 'path': 'https://creativecommons.org/publicdomain/zero/1.0/'}}}
diff --git a/src/omi/cli.py b/src/omi/cli.py
index 72bb009..024d35e 100644
--- a/src/omi/cli.py
+++ b/src/omi/cli.py
@@ -29,12 +29,14 @@ def grp():
 @click.option("-f", help="Dialect identifier of the input")
 @click.option("-t", default="oep-v1.5", help="Dialect identifier to translate to")
 @click.option("-o", default=None, help="Output file")
+@click.option("-omit_nones", default=True, help="Use to either keep or omit all null / none values from the json.")
 @click.argument("file_path")
-def translate(f, t, o, file_path):
+def translate(f, t, o, omit_nones, file_path):
     with open(file_path, "r", encoding="utf-8") as infile:
         from_dialect = get_dialect(f)()
         obj = from_dialect.parse(infile.read())
         to_dialect = get_dialect(t)()
+        to_dialect._compiler.OMIT_NONE_FIELDS = omit_nones
         s = to_dialect.compile_and_render(obj)
         if o:
             with open(o, "w", encoding="utf-8") as outfile:
diff --git a/src/omi/dialects/oep/compiler.py b/src/omi/dialects/oep/compiler.py
index 1dbcbe4..50e2742 100644
--- a/src/omi/dialects/oep/compiler.py
+++ b/src/omi/dialects/oep/compiler.py
@@ -17,8 +17,9 @@ def compile_date_or_none(x, format=None):
 
 class JSONCompiler(Compiler):
     __METADATA_VERSION = "OEP-1.4.0"
+    OMIT_NONE_FIELDS = False
 
-    def _construct_dict(self, *args, omit_none=True, **kwargs):
+    def _construct_dict(self, *args, omit_none=None, **kwargs):
         """
         Accepts a list of arguments of shape (name: str, field: Compileable) and returns a dictionary that maps
         name -> self.visit(field). If `omit_none` is true, fields that are `None` are ignored.
@@ -32,6 +33,7 @@ def _construct_dict(self, *args, omit_none=True, **kwargs):
         -------
 
         """
+        omit_none = self.OMIT_NONE_FIELDS
         d = {
             field_name: self.visit(field)
             for field_name, field in args
diff --git a/tests/test_cli/test_cli_translation.py b/tests/test_cli/test_cli_translation.py
index 8df1680..6ec50ae 100644
--- a/tests/test_cli/test_cli_translation.py
+++ b/tests/test_cli/test_cli_translation.py
@@ -3,15 +3,20 @@
 from omi.cli import translate
 import json
 
+
 def test_cli_translation():
     @click.command()
-    @click.argument('name')
+    @click.argument("name")
     def hello(name):
-        click.echo('Hello %s!' % name)
+        click.echo("Hello %s!" % name)
 
     runner = CliRunner()
-    result = runner.invoke(translate, ["-f", "oep-v1.3", "-t", "oep-v1.4", "tests/data/metadata_v13.json"])
+    result = runner.invoke(
+        translate,
+        ["-f", "oep-v1.3", "-t", "oep-v1.4", "-omit_nones", "True", "tests/data/metadata_v13.json"],
+    )
     with open("tests/data/metadata_v13_converted.json") as expected_file:
         expected = json.loads(expected_file.read())
+        print(result)
         assert result.exit_code == 0
         assert json.loads(result.output) == expected
diff --git a/tests/test_dialects/test_oep/test_compiler.py b/tests/test_dialects/test_oep/test_compiler.py
index 7916548..13eaaa4 100644
--- a/tests/test_dialects/test_oep/test_compiler.py
+++ b/tests/test_dialects/test_oep/test_compiler.py
@@ -7,6 +7,8 @@
 
 def test_compiler_v1_5():
     compiler = JSONCompilerOEM15()
+    # omit none values as expected result also does not include None´s
+    compiler.OMIT_NONE_FIELDS = True
     with open("tests/data/metadata_v15.json", "r", encoding="utf-8") as _input_file:
         expected_result = json.load(_input_file)
         result = compiler.visit(metadata_v_1_5)
@@ -15,6 +17,8 @@ def test_compiler_v1_5():
 
 def test_compiler_v1_4():
     compiler = JSONCompiler()
+    # omit none values as expected result also does not include None´s
+    compiler.OMIT_NONE_FIELDS = True
     with open("tests/data/metadata_v14.json", "r", encoding="utf-8") as _input_file:
         expected_result = json.load(_input_file)
         result = compiler.visit(metadata_v_1_4)
diff --git a/tests/test_dialects/test_oep/test_translation.py b/tests/test_dialects/test_oep/test_translation.py
index 4a958b6..1448ebd 100644
--- a/tests/test_dialects/test_oep/test_translation.py
+++ b/tests/test_dialects/test_oep/test_translation.py
@@ -10,6 +10,8 @@
 def test_translation_1_3_to_1_4():
     parser = JSONParser_1_3()
     compiler = JSONCompiler()
+    # omit none values as expected result also does not include None´s
+    compiler.OMIT_NONE_FIELDS = True
     with open("tests/data/metadata_v13_minimal.json", "r") as _input_file:
         input_string = _input_file.read()
         # Step 1: Parse JSON to internal structure