diff --git a/openapi2jsonschema/command.py b/openapi2jsonschema/command.py
index 9cd1bfc..8fc8671 100644
--- a/openapi2jsonschema/command.py
+++ b/openapi2jsonschema/command.py
@@ -16,6 +16,7 @@
     allow_null_optional_fields,
     change_dict_values,
     append_no_duplicates,
+    get_request_and_response_body_components_from_paths,
 )
 from openapi2jsonschema.errors import UnsupportedError
 
@@ -43,13 +44,31 @@
 @click.option(
     "--kubernetes", is_flag=True, help="Enable Kubernetes specific processors"
 )
+@click.option(
+    "--no-all", is_flag=True, help="Do not generate all.json file"
+)
 @click.option(
     "--strict",
     is_flag=True,
     help="Prohibits properties not in the schema (additionalProperties: false)",
 )
+@click.option(
+    "--include-bodies",
+    is_flag=True,
+    help="Include request and response bodies as if they are components",
+)
 @click.argument("schema", metavar="SCHEMA_URL")
-def default(output, schema, prefix, stand_alone, expanded, kubernetes, strict):
+def default(
+    output,
+    schema,
+    prefix,
+    stand_alone,
+    expanded,
+    kubernetes,
+    strict,
+    no_all,
+    include_bodies,
+):
     """
     Converts a valid OpenAPI specification into a set of JSON Schema files
     """
@@ -126,8 +145,15 @@ def default(output, schema, prefix, stand_alone, expanded, kubernetes, strict):
     else:
         components = data["components"]["schemas"]
 
+    generated_files = []
+
+    if include_bodies:
+        components.update(
+            get_request_and_response_body_components_from_paths(data["paths"]),
+        )
+
     for title in components:
-        kind = title.split(".")[-1].lower()
+        kind = title.split(".")[-1]
         if kubernetes:
             group = title.split(".")[-3].lower()
             api_version = title.split(".")[-2].lower()
@@ -164,8 +190,7 @@ def default(output, schema, prefix, stand_alone, expanded, kubernetes, strict):
             if (
                 kubernetes
                 and stand_alone
-                and kind
-                in [
+                and kind.lower() in [
                     "jsonschemaprops",
                     "jsonschemapropsorarray",
                     "customresourcevalidation",
@@ -183,9 +208,9 @@ def default(output, schema, prefix, stand_alone, expanded, kubernetes, strict):
             specification = updated
 
             if stand_alone:
-                base = "file://%s/%s/" % (os.getcwd(), output)
-                specification = JsonRef.replace_refs(
-                    specification, base_uri=base)
+                # Put generated file on list for dereferencig $ref elements
+                # after all files will be generated
+                generated_files.append(full_name)
 
             if "additionalProperties" in specification:
                 if specification["additionalProperties"]:
@@ -209,19 +234,30 @@ def default(output, schema, prefix, stand_alone, expanded, kubernetes, strict):
         except Exception as e:
             error("An error occured processing %s: %s" % (kind, e))
 
-    with open("%s/all.json" % output, "w") as all_file:
-        info("Generating schema for all types")
-        contents = {"oneOf": []}
-        for title in types:
-            if version < "3":
-                contents["oneOf"].append(
-                    {"$ref": "%s#/definitions/%s" % (prefix, title)}
-                )
-            else:
-                contents["oneOf"].append(
-                    {"$ref": (title.replace("#/components/schemas/", "") + ".json")}
-                )
-        all_file.write(json.dumps(contents, indent=2))
+    if stand_alone:
+        base = "file://%s/%s/" % (os.getcwd(), output)
+        for file_name in generated_files:
+            full_path = "%s/%s.json" % (output, file_name)
+            specification = json.load(open(full_path))
+            specification = JsonRef.replace_refs(
+                specification, base_uri=base)
+            with open(full_path, "w") as schema_file:
+                schema_file.write(json.dumps(specification, indent=2))
+
+    if not no_all:
+        with open("%s/all.json" % output, "w") as all_file:
+            info("Generating schema for all types")
+            contents = {"oneOf": []}
+            for title in types:
+                if version < "3":
+                    contents["oneOf"].append(
+                        {"$ref": "%s#/definitions/%s" % (prefix, title)}
+                    )
+                else:
+                    contents["oneOf"].append(
+                        {"$ref": (title.replace("#/components/schemas/", "") + ".json")}
+                    )
+            all_file.write(json.dumps(contents, indent=2))
 
 
 if __name__ == "__main__":
diff --git a/openapi2jsonschema/util.py b/openapi2jsonschema/util.py
index 34270d2..f564d69 100644
--- a/openapi2jsonschema/util.py
+++ b/openapi2jsonschema/util.py
@@ -1,5 +1,7 @@
 #!/usr/bin/env python
 
+import re
+
 
 def iteritems(d):
     if hasattr(dict, "iteritems"):
@@ -77,7 +79,10 @@ def allow_null_optional_fields(data, parent=None, grand_parent=None, key=None):
 def change_dict_values(d, prefix, version):
     new = {}
     try:
+        is_nullable = False
         for k, v in iteritems(d):
+            if k == 'nullable':
+                is_nullable = True
             new_v = v
             if isinstance(v, dict):
                 new_v = change_dict_values(v, prefix, version)
@@ -90,10 +95,14 @@ def change_dict_values(d, prefix, version):
                     if version < "3":
                         new_v = "%s%s" % (prefix, v)
                     else:
-                        new_v = v.replace("#/components/schemas/", "") + ".json"
+                        new_v = v.replace("#/components/schemas/", "").lower() + ".json"
             else:
                 new_v = v
             new[k] = new_v
+        if is_nullable and 'type' in new:
+            if not isinstance(new['type'], list):
+                new['type'] = [new['type']]
+            new['type'].append('null')
         return new
     except AttributeError:
         return d
@@ -108,3 +117,49 @@ def append_no_duplicates(obj, key, value):
         obj[key] = []
     if value not in obj[key]:
         obj[key].append(value)
+
+
+def get_components_from_body_definition(body_definition, prefix=""):
+    MIMETYPE_TO_TYPENAME_MAP = {
+        "application/json": "json",
+        "application/vnd.api+json": "jsonapi",
+    }
+    result = {}
+    for mimetype, definition in body_definition.get("content", {}).items():
+        type_name = MIMETYPE_TO_TYPENAME_MAP.get(
+            mimetype,
+            mimetype.replace("/", "_"),
+        )
+        if "schema" in definition:
+            result["{:s}{:s}".format(prefix, type_name)] = definition["schema"]
+    return result
+
+
+def get_request_and_response_body_components_from_paths(paths):
+    components = {}
+    for path, path_definition in paths.items():
+        for http_method, http_method_definition in path_definition.items():
+            name_prefix_fmt = "paths_{:s}_{:s}_{{:s}}_".format(
+                # Paths "/" and "/root" will conflict,
+                # no idea how to solve this elegantly.
+                path.lstrip("/").replace("/", "_") or "root",
+                http_method.upper(),
+            )
+            name_prefix_fmt = re.sub(
+                r"\{([^:\}]+)\}",
+                r"_\1_",
+                name_prefix_fmt,
+            )
+            if "requestBody" in http_method_definition:
+                components.update(get_components_from_body_definition(
+                    http_method_definition["requestBody"],
+                    prefix=name_prefix_fmt.format("request")
+                ))
+            responses = http_method_definition["responses"]
+            for response_code, response in responses.items():
+                response_name_part = "response_{}".format(response_code)
+                components.update(get_components_from_body_definition(
+                    response,
+                    prefix=name_prefix_fmt.format(response_name_part),
+                ))
+    return components