diff --git a/frontend/src/core/components/tools/certSign/CertificateFilesSettings.tsx b/frontend/src/core/components/tools/certSign/CertificateFilesSettings.tsx
index ffedbe70d..6e6df830c 100644
--- a/frontend/src/core/components/tools/certSign/CertificateFilesSettings.tsx
+++ b/frontend/src/core/components/tools/certSign/CertificateFilesSettings.tsx
@@ -36,23 +36,17 @@ const CertificateFilesSettings = ({ parameters, onParameterChange, disabled = fa
         </Stack>
       )}
 
-      {parameters.certType === 'PKCS12' && (
+      {(parameters.certType === 'PKCS12' || parameters.certType === 'PFX') && (
         <FileUploadButton
           file={parameters.p12File}
           onChange={(file) => onParameterChange('p12File', file || undefined)}
-          accept=".p12"
+          accept=".p12,.pfx"
           disabled={disabled}
-          placeholder={t('certSign.chooseP12File', 'Choose PKCS12 File')}
-        />
-      )}
-
-      {parameters.certType === 'PFX' && (
-        <FileUploadButton
-          file={parameters.p12File}
-          onChange={(file) => onParameterChange('p12File', file || undefined)}
-          accept=".pfx"
-          disabled={disabled}
-          placeholder={t('certSign.choosePfxFile', 'Choose PFX File')}
+          placeholder={
+            parameters.certType === 'PFX'
+              ? t('certSign.choosePfxFile', 'Choose PFX File')
+              : t('certSign.chooseP12File', 'Choose PKCS12 File')
+          }
         />
       )}
 
@@ -92,4 +86,4 @@ const CertificateFilesSettings = ({ parameters, onParameterChange, disabled = fa
   );
 };
 
-export default CertificateFilesSettings;
\ No newline at end of file
+export default CertificateFilesSettings;
diff --git a/frontend/src/core/hooks/tools/certSign/useCertSignOperation.ts b/frontend/src/core/hooks/tools/certSign/useCertSignOperation.ts
index c81b73fea..d8c580fe2 100644
--- a/frontend/src/core/hooks/tools/certSign/useCertSignOperation.ts
+++ b/frontend/src/core/hooks/tools/certSign/useCertSignOperation.ts
@@ -7,14 +7,14 @@ import { CertSignParameters, defaultParameters } from '@app/hooks/tools/certSign
 export const buildCertSignFormData = (parameters: CertSignParameters, file: File): FormData => {
   const formData = new FormData();
   formData.append('fileInput', file);
-  
+
   // Handle sign mode
   if (parameters.signMode === 'AUTO') {
     formData.append('certType', 'SERVER');
   } else {
     formData.append('certType', parameters.certType);
     formData.append('password', parameters.password);
-    
+
     // Add certificate files based on type (only for manual mode)
     switch (parameters.certType) {
       case 'PEM':
@@ -26,6 +26,7 @@ export const buildCertSignFormData = (parameters: CertSignParameters, file: File
         }
         break;
       case 'PKCS12':
+      case 'PFX':
         if (parameters.p12File) {
           formData.append('p12File', parameters.p12File);
         }
@@ -37,7 +38,7 @@ export const buildCertSignFormData = (parameters: CertSignParameters, file: File
         break;
     }
   }
-  
+
   // Add signature appearance options if enabled
   if (parameters.showSignature) {
     formData.append('showSignature', 'true');
@@ -47,7 +48,7 @@ export const buildCertSignFormData = (parameters: CertSignParameters, file: File
     formData.append('pageNumber', parameters.pageNumber.toString());
     formData.append('showLogo', parameters.showLogo.toString());
   }
-  
+
   return formData;
 };
 
@@ -68,4 +69,4 @@ export const useCertSignOperation = () => {
     ...certSignOperationConfig,
     getErrorMessage: createStandardErrorHandler(t('certSign.error.failed', 'An error occurred while processing signatures.'))
   });
-};
\ No newline at end of file
+};