diff --git a/Resources/Private/JavaScript/asset-collections/src/components/AddTagButton.tsx b/Resources/Private/JavaScript/asset-collections/src/components/AddTagButton.tsx
index 48e9c3a36..65b3f82c2 100644
--- a/Resources/Private/JavaScript/asset-collections/src/components/AddTagButton.tsx
+++ b/Resources/Private/JavaScript/asset-collections/src/components/AddTagButton.tsx
@@ -16,7 +16,15 @@ const AddTagButton: React.FC = () => {
     const selectedTagId = useRecoilValue(selectedTagIdState);
 
     const onClickCreate = useCallback(() => {
-        setCreateTagDialogState({ label: '', visible: true });
+        setCreateTagDialogState({
+            visible: true,
+            label: '',
+            tags: [],
+            validation: {
+                valid: false,
+                errors: [],
+            },
+        });
     }, [setCreateTagDialogState]);
 
     return (
diff --git a/Resources/Private/JavaScript/asset-tags/src/components/CreateTagDialog.tsx b/Resources/Private/JavaScript/asset-tags/src/components/CreateTagDialog.tsx
index f2af832f0..3f22e7148 100644
--- a/Resources/Private/JavaScript/asset-tags/src/components/CreateTagDialog.tsx
+++ b/Resources/Private/JavaScript/asset-tags/src/components/CreateTagDialog.tsx
@@ -2,11 +2,13 @@ import * as React from 'react';
 import { useCallback } from 'react';
 import { useRecoilState } from 'recoil';
 
-import { Button, Label, TextInput } from '@neos-project/react-ui-components';
+import { Button, Label, TextInput, Tooltip } from '@neos-project/react-ui-components';
 
+import TAGS from '../queries/tags';
+import { useQuery } from '@apollo/client';
 import { useIntl, useNotify } from '@media-ui/core';
 import { useSelectedAssetCollection } from '@media-ui/feature-asset-collections';
-import { useCreateTag } from '@media-ui/feature-asset-tags';
+import { useCreateTag, useTagsQuery } from '@media-ui/feature-asset-tags';
 import { Dialog } from '@media-ui/core/src/components';
 
 import createTagDialogState from '../state/createTagDialogState';
@@ -18,10 +20,22 @@ const CreateTagDialog: React.FC = () => {
     const Notify = useNotify();
     const selectedAssetCollection = useSelectedAssetCollection();
     const [dialogState, setDialogState] = useRecoilState(createTagDialogState);
-    const createPossible = !!(dialogState.label && dialogState.label.trim());
     const { createTag } = useCreateTag();
+    const { tags } = useTagsQuery();
 
-    const handleRequestClose = useCallback(() => setDialogState({ visible: false, label: '' }), [setDialogState]);
+    const handleRequestClose = useCallback(
+        () =>
+            setDialogState({
+                visible: false,
+                label: '',
+                tags: [],
+                validation: {
+                    valid: false,
+                    errors: [],
+                },
+            }),
+        [setDialogState]
+    );
     const handleCreate = useCallback(() => {
         setDialogState((state) => ({ ...state, visible: false }));
         createTag(dialogState.label, selectedAssetCollection?.id)
@@ -32,7 +46,32 @@ const CreateTagDialog: React.FC = () => {
                 return;
             });
     }, [Notify, setDialogState, createTag, dialogState, translate, selectedAssetCollection]);
-    const setLabel = useCallback((label) => setDialogState((state) => ({ ...state, label })), [setDialogState]);
+    const validate = (label) => {
+        const validationErrors = [];
+        const trimmedLabel = label.trim();
+        const tagWithLabelExist = tags?.some((tag) => tag.label === trimmedLabel);
+
+        if (trimmedLabel.length === 0) {
+            validationErrors.push(translate('tagActions.validation.emtpyTagLabl', 'Please provide a tag label'));
+        }
+
+        if (tagWithLabelExist) {
+            validationErrors.push(translate('tagActions.validation.tagExists', 'A tag with this label already exists'));
+        }
+
+        const validation = {
+            errors: validationErrors,
+            valid: validationErrors.length === 0,
+        };
+        setDialogState((state) => ({ ...state, validation }));
+    };
+    const setLabel = useCallback(
+        (label) => {
+            validate(label);
+            setDialogState((state) => ({ ...state, label }));
+        },
+        [setDialogState]
+    );
 
     return (
         <Dialog
@@ -47,7 +86,7 @@ const CreateTagDialog: React.FC = () => {
                     key="upload"
                     style="success"
                     hoverStyle="success"
-                    disabled={!createPossible}
+                    disabled={!dialogState.validation?.valid}
                     onClick={handleCreate}
                 >
                     {translate('general.create', 'Create')}
@@ -58,11 +97,22 @@ const CreateTagDialog: React.FC = () => {
                 <Label>{translate('general.label', 'Label')}</Label>
                 <TextInput
                     setFocus
+                    validationerrors={dialogState.validation?.valid ? null : ['This input is invalid']}
+                    required={true}
                     type="text"
                     value={dialogState.label}
                     onChange={setLabel}
-                    onEnterKey={createPossible ? handleCreate : null}
+                    onEnterKey={dialogState.validation?.valid ? handleCreate : null}
                 />
+                {dialogState.validation?.errors?.length > 0 && (
+                    <Tooltip renderInline asError>
+                        <ul>
+                            {dialogState.validation.errors.map((error, index) => (
+                                <li key={index}>{error}</li>
+                            ))}
+                        </ul>
+                    </Tooltip>
+                )}
             </div>
         </Dialog>
     );
diff --git a/Resources/Private/JavaScript/asset-tags/src/state/createTagDialogState.ts b/Resources/Private/JavaScript/asset-tags/src/state/createTagDialogState.ts
index 5e9e1d1ce..b0b1b4691 100644
--- a/Resources/Private/JavaScript/asset-tags/src/state/createTagDialogState.ts
+++ b/Resources/Private/JavaScript/asset-tags/src/state/createTagDialogState.ts
@@ -5,6 +5,11 @@ const createTagDialogState = atom({
     default: {
         visible: false,
         label: '',
+        tags: [],
+        validation: {
+            valid: false,
+            errors: [],
+        },
     },
 });
 
diff --git a/Resources/Private/JavaScript/media-module/tests/tags.ts b/Resources/Private/JavaScript/media-module/tests/tags.ts
index 52272f1aa..2955b3a13 100644
--- a/Resources/Private/JavaScript/media-module/tests/tags.ts
+++ b/Resources/Private/JavaScript/media-module/tests/tags.ts
@@ -1,8 +1,11 @@
 import page from './page-model';
+import { ReactSelector } from 'testcafe-react-selectors';
 import { SERVER_NAME } from './helpers';
 
 fixture('Tags').page(SERVER_NAME);
 
+const subSection = (name) => console.log('\x1b[33m%s\x1b[0m', ' - ' + name);
+
 test('Clicking first tag updates list and only assets should be shown that are assigned to it', async (t) => {
     await t
         // Uncollapse the tag list
@@ -19,3 +22,34 @@ test('Clicking first tag updates list and only assets should be shown that are a
         .expect(page.assetCount.innerText)
         .eql('12 assets');
 });
+
+test('Create a new tag and test validation', async (t) => {
+    subSection('Check existing tag label validation');
+    await t
+        .click(page.assetCollections.withText('All'))
+        .click(page.collectionTree.findReact('AddTagButton'))
+        .typeText(ReactSelector('CreateTagDialog').findReact('TextInput'), 'Example tag 1')
+        .expect(
+            ReactSelector('CreateTagDialog')
+                .findReact('TextInput')
+                .withProps({ validationerrors: ['This input is invalid'] }).exists
+        )
+        .ok('Text input should have validation errors')
+        .expect(ReactSelector('CreateTagDialog').findReact('Button').withProps({ disabled: true }).exists)
+        .ok('Create button should be disabled')
+        .expect(ReactSelector('CreateTagDialog').find('ul li').textContent)
+        .eql('A tag with this label already exists')
+        .typeText(ReactSelector('CreateTagDialog').findReact('TextInput'), '00')
+        .expect(ReactSelector('CreateTagDialog').find('ul li').exists)
+        .notOk('The tooltip should not be visible anymore')
+        .expect(ReactSelector('CreateTagDialog').findReact('Button').withProps({ disabled: false }).exists)
+        .ok('Create button should be enabled');
+
+    subSection('Check emtpy tag label validation');
+    await t
+        .typeText(ReactSelector('CreateTagDialog').findReact('TextInput'), ' ', { replace: true })
+        .expect(ReactSelector('CreateTagDialog').findReact('Button').withProps({ disabled: true }).exists)
+        .ok('Create button should be disabled')
+        .expect(ReactSelector('CreateTagDialog').find('ul li').textContent)
+        .eql('Please provide a tag label');
+});
diff --git a/Resources/Private/Translations/de/Main.xlf b/Resources/Private/Translations/de/Main.xlf
index 1b985d9e1..39768f730 100644
--- a/Resources/Private/Translations/de/Main.xlf
+++ b/Resources/Private/Translations/de/Main.xlf
@@ -412,6 +412,14 @@
                 <source>Create tag</source>
                 <target>Tag erstellen</target>
             </trans-unit>
+            <trans-unit id="tagActions.validation.emtpyTagLabl" xml:space="preserve" approved="yes">
+                <source>Please provide a tag label</source>
+                <target>Bitte geben Sie einen Tag-Namen ein</target>
+            </trans-unit>
+            <trans-unit id="tagActions.validation.tagExists" xml:space="preserve" approved="yes">
+                <source>This tag is already exists. Please choose a different one.</source>
+                <target>Dieser Tag existiert bereits. Bitte wählen Sie einen anderen aus.</target>
+            </trans-unit>
             <trans-unit id="tagActions.create.success" xml:space="preserve" approved="yes">
                 <source>Tag was created</source>
                 <target>Tag wurde erstellt</target>
diff --git a/Resources/Private/Translations/en/Main.xlf b/Resources/Private/Translations/en/Main.xlf
index 2cbd5f036..43b3b31fa 100644
--- a/Resources/Private/Translations/en/Main.xlf
+++ b/Resources/Private/Translations/en/Main.xlf
@@ -316,6 +316,12 @@
             <trans-unit id="tagActions.create.success" xml:space="preserve" approved="yes">
                 <source>Tag was created</source>
             </trans-unit>
+            <trans-unit id="tagActions.validation.emtpyTagLabl" xml:space="preserve" approved="yes">
+                <source>Please provide a tag label</source>
+            </trans-unit>
+            <trans-unit id="tagActions.validation.tagExists" xml:space="preserve" approved="yes">
+                <source>This tag is already exists. Please choose a different one.</source>
+            </trans-unit>
             <trans-unit id="tagActions.create.error" xml:space="preserve" approved="yes">
                 <source>Failed to create tag</source>
             </trans-unit>