diff --git a/app/javascript/controllers/textarea_controller.ts b/app/javascript/controllers/textarea_controller.ts
new file mode 100644
index 000000000..410c5be65
--- /dev/null
+++ b/app/javascript/controllers/textarea_controller.ts
@@ -0,0 +1,44 @@
+import { ApplicationController } from './application_controller';
+
+export class TextareaController extends ApplicationController {
+  static values = {
+    maxRows: Number
+  };
+
+  declare readonly maxRowsValue: number;
+
+  connect() {
+    if (this.maxRowsValue) {
+      this.attachEvents();
+    }
+  }
+
+  private attachEvents() {
+    this.on('keyup', (event: KeyboardEvent) => {
+      if (event.key === 'Enter') {
+        this.processTextareaContent(event);
+      }
+    });
+
+    this.on('paste', (event: ClipboardEvent) => {
+      // Wait for the paste event to complete
+      setTimeout(() => this.processTextareaContent(event), 0);
+    });
+  }
+
+  private processTextareaContent(event: Event) {
+    const target = event.target as HTMLTextAreaElement;
+    let lines = target.value.split('\n');
+
+    if (lines.length > this.maxRowsValue) {
+      // Truncate lines to the maximum allowed
+      lines = lines.slice(0, this.maxRowsValue);
+      target.value = lines.join('\n');
+
+      if (event instanceof KeyboardEvent) {
+        // Prevent the default action only for KeyboardEvent (enter key)
+        event.preventDefault();
+      }
+    }
+  }
+}
diff --git a/app/views/administrateurs/attestation_template_v2s/edit.html.haml b/app/views/administrateurs/attestation_template_v2s/edit.html.haml
index dc5de4e26..533511fa3 100644
--- a/app/views/administrateurs/attestation_template_v2s/edit.html.haml
+++ b/app/views/administrateurs/attestation_template_v2s/edit.html.haml
@@ -30,7 +30,7 @@
             %h6 En-tête
 
           .fr-fieldset__element{ class: class_names("hidden" => !@attestation_template.official_layout?), data: { "attestation-target": 'logoMarianneLabelFieldset'} }
-            = render Dsfr::InputComponent.new(form: f, attribute: :label_logo, input_type: :text_area, required: false, opts: { rows: 3 }) do |c|
+            = render Dsfr::InputComponent.new(form: f, attribute: :label_logo, input_type: :text_area, required: false, opts: { rows: 3, data: { controller: :textarea, textarea_max_rows_value: 3 } }) do |c|
               - c.with_hint { "Exemple: Ministère de la Mer. 3 lignes maximum" }
 
           .fr-fieldset__element{ data: { attestation_target: 'logoAttachmentFieldset' } }
@@ -47,7 +47,7 @@
               = render Attachment::EditComponent.new(attached_file: @attestation_template.logo, direct_upload: false)
 
           .fr-fieldset__element
-            = render Dsfr::InputComponent.new(form: f, attribute: :label_direction, input_type: :text_area, required: false, opts: { rows: 2 }) do |c|
+            = render Dsfr::InputComponent.new(form: f, attribute: :label_direction, input_type: :text_area, required: false, opts: { rows: 2, data: { controller: :textarea, textarea_max_rows_value: 2 } }) do |c|
               - c.with_hint { "Exemple: Direction interministérielle du numérique. 2 lignes maximum" }
 
           .fr-fieldset__element.fr-mt-2w
@@ -85,7 +85,7 @@
               = render Attachment::EditComponent.new(attached_file: @attestation_template.signature, direct_upload: false)
 
           .fr-fieldset__element
-            = render Dsfr::InputComponent.new(form: f, attribute: :footer, input_type: :text_area, required: false, opts: { rows: 3 }) do |c|
+            = render Dsfr::InputComponent.new(form: f, attribute: :footer, input_type: :text_area, required: false, opts: { rows: 3, data: { controller: :textarea, textarea_max_rows_value: 3 } }) do |c|
               - c.with_hint { "Exemple: 20 avenue de Ségur, 75007 Paris" }
 
       .fr-col-12.fr-col-md-4.fr-background-alt--blue-france