diff --git a/projects/modeling-shared/sdk/src/lib/variables/properties-viewer/value-type-inputs/json-input/json-input.component.spec.ts b/projects/modeling-shared/sdk/src/lib/variables/properties-viewer/value-type-inputs/json-input/json-input.component.spec.ts
index dceba1a44..331bfb341 100644
--- a/projects/modeling-shared/sdk/src/lib/variables/properties-viewer/value-type-inputs/json-input/json-input.component.spec.ts
+++ b/projects/modeling-shared/sdk/src/lib/variables/properties-viewer/value-type-inputs/json-input/json-input.component.spec.ts
@@ -15,31 +15,30 @@
  * limitations under the License.
  */
 
+import { TranslationMock, TranslationService } from '@alfresco/adf-core';
 import { async, ComponentFixture, TestBed } from '@angular/core/testing';
-
-import { TranslateModule } from '@ngx-translate/core';
-import { TranslationService, TranslationMock } from '@alfresco/adf-core';
-import { NoopAnimationsModule } from '@angular/platform-browser/animations';
-import { ValueTypeInputComponent } from '../../value-type-input.component';
 import { FormBuilder, FormsModule, ReactiveFormsModule } from '@angular/forms';
+import { MatAutocompleteModule } from '@angular/material/autocomplete';
+import { MatChipsModule } from '@angular/material/chips';
 import { MatDialogModule } from '@angular/material/dialog';
 import { MatFormFieldModule } from '@angular/material/form-field';
+import { MatIconModule } from '@angular/material/icon';
 import { MatInputModule } from '@angular/material/input';
+import { NoopAnimationsModule } from '@angular/platform-browser/animations';
+import { Store } from '@ngrx/store';
+import { TranslateModule } from '@ngx-translate/core';
+import { CodeEditorService } from '../../../../code-editor/services/code-editor-service.service';
+import { AllowedCharactersDirective } from '../../../../helpers/directives/allowed-characters.directive';
 import { JSONSchemaToEntityPropertyService } from '../../../../services/json-schema-to-entity-property.service';
-import { PropertiesViewerStringInputComponent } from '../string-input/string-input.component';
+import { provideModelingJsonSchemaProvider } from '../../../../services/modeling-json-schema-provider.service';
 import { ModelingJSONSchemaService } from '../../../../services/modeling-json-schema.service';
-import { CodeEditorService } from '../../../../code-editor/services/code-editor-service.service';
-import { provideInputTypeItemHandler } from '../value-type-inputs';
-import { MatChipsModule } from '@angular/material/chips';
-import { MatIconModule } from '@angular/material/icon';
-import { MatAutocompleteModule } from '@angular/material/autocomplete';
-import { PropertiesViewerArrayInputComponent } from '../array-input/array-input.component';
+import { RegisteredInputsModelingJsonSchemaProvider } from '../../../../services/registered-inputs-modeling-json-schema-provider.service';
+import { ValueTypeInputComponent } from '../../value-type-input.component';
 import { VariableValuePipe } from '../../variable-value.pipe';
-import { AllowedCharactersDirective } from '../../../../helpers/directives/allowed-characters.directive';
-import { Store } from '@ngrx/store';
+import { PropertiesViewerArrayInputComponent } from '../array-input/array-input.component';
+import { PropertiesViewerStringInputComponent } from '../string-input/string-input.component';
+import { provideInputTypeItemHandler } from '../value-type-inputs';
 import { PropertiesViewerJsonInputComponent } from './json-input.component';
-import { RegisteredInputsModelingJsonSchemaProvider } from '../../../../services/registered-inputs-modeling-json-schema-provider.service';
-import { provideModelingJsonSchemaProvider } from '../../../../services/modeling-json-schema-provider.service';
 
 describe('PropertiesViewerJsonInputComponent', () => {
     let component: PropertiesViewerJsonInputComponent;
@@ -148,6 +147,11 @@ describe('PropertiesViewerJsonInputComponent', () => {
             component.onChange('[1, 2, 3]');
             expect(component.change.emit).toHaveBeenCalledWith([1, 2, 3]);
         });
+
+        it('undefined', () => {
+            component.onChange(undefined);
+            expect(component.change.emit).toHaveBeenCalledWith('');
+        });
     });
 
     describe('should emit the modeled object stringified when is valid', () => {
@@ -195,4 +199,34 @@ describe('PropertiesViewerJsonInputComponent', () => {
         component.model = { $ref: '#/$defs/primitive/json' };
         expect(component.isPrimitiveJSONInput).toEqual(true);
     });
+
+    describe('should transform to string', () => {
+        it('null', () => {
+            component.value = null;
+            component.ngOnChanges();
+
+            expect(component.stringValue).toBe('');
+        });
+
+        it('number', () => {
+            component.value = 123;
+            component.ngOnChanges();
+
+            expect(component.stringValue).toBe('123');
+        });
+
+        it('string', () => {
+            component.value = 'a';
+            component.ngOnChanges();
+
+            expect(component.stringValue).toBe('a');
+        });
+
+        it('boolean', () => {
+            component.value = true;
+            component.ngOnChanges();
+
+            expect(component.stringValue).toBe('true');
+        });
+    });
 });
diff --git a/projects/modeling-shared/sdk/src/lib/variables/properties-viewer/value-type-inputs/json-input/json-input.component.ts b/projects/modeling-shared/sdk/src/lib/variables/properties-viewer/value-type-inputs/json-input/json-input.component.ts
index 325599d6c..d2c8c9830 100644
--- a/projects/modeling-shared/sdk/src/lib/variables/properties-viewer/value-type-inputs/json-input/json-input.component.ts
+++ b/projects/modeling-shared/sdk/src/lib/variables/properties-viewer/value-type-inputs/json-input/json-input.component.ts
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-import { Component, Output, EventEmitter, Input, OnChanges } from '@angular/core';
+import { Component, EventEmitter, Input, OnChanges, Output } from '@angular/core';
 import { EntityProperty, JSONSchemaInfoBasics } from '../../../../api/types';
 import { ModelingJSONSchemaService } from '../../../../services/modeling-json-schema.service';
 import { ModeledObjectChanges } from '../modeled-object/modeled-object-input.component';
@@ -49,25 +49,37 @@ export class PropertiesViewerJsonInputComponent implements OnChanges {
     }
 
     ngOnChanges(): void {
-        if (this.value && this.contentChanges()) {
-            if (typeof this.value !== 'string') {
-                this.stringValue = this.stringifyValue();
-            } else {
-                this.stringValue = this.value;
-            }
+        if (this.contentChanges()) {
+            this.stringValue = this.getStringValue(this.value);
         }
     }
 
+    private getStringValue(value: unknown) {
+        if (!value) {
+            return '';
+        }
+
+        if (typeof value !== 'string') {
+            return this.stringifyValue(value);
+        }
+
+        return value;
+    }
+
     private contentChanges(): boolean {
         let check = this.stringValue;
         try {
-            check = this.stringifyValue();
+            check = this.stringifyValue(this.value);
         } catch (error) { }
         return this.stringValue !== check;
     }
 
-    private stringifyValue(): string {
-        return JSON.stringify(this.value, null, 4);
+    private stringifyValue(value: unknown): string {
+        try {
+            return JSON.stringify(value, null, 4);
+        } catch (e) { }
+
+        return '';
     }
 
     onChange(value: string) {
@@ -84,12 +96,22 @@ export class PropertiesViewerJsonInputComponent implements OnChanges {
         this.emitValue();
     }
 
-    private emitValue() {
+    private getValueForEmit() {
+        if (!this.value) {
+            return '';
+        }
+
         if (this.valid && this.value) {
-            this.change.emit(this.value);
-        } else {
-            this.change.emit(null);
+            return this.value;
         }
+
+        return null;
+    }
+
+    private emitValue() {
+        const value = this.getValueForEmit();
+
+        this.change.emit(value);
     }
 
     get isPrimitiveJSONInput() {