diff --git a/e2e/playwright/viewer/src/tests/viewer-zoom-functionality.e2e.ts b/e2e/playwright/viewer/src/tests/viewer-zoom-functionality.e2e.ts
new file mode 100644
index 000000000..fa271111f
--- /dev/null
+++ b/e2e/playwright/viewer/src/tests/viewer-zoom-functionality.e2e.ts
@@ -0,0 +1,232 @@
+/*!
+ * Copyright © 2005-2025 Hyland Software, Inc. and its affiliates. All rights reserved.
+ *
+ * Alfresco Example Content Application
+ *
+ * This file is part of the Alfresco Example Content Application.
+ * If the software was purchased under a paid Alfresco license, the terms of
+ * the paid license agreement will prevail. Otherwise, the software is
+ * provided under the following open source license terms:
+ *
+ * The Alfresco Example Content Application is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * The Alfresco Example Content Application is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * from Hyland Software. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import { expect } from '@playwright/test';
+import {
+  ApiClientFactory,
+  FavoritesPageApi,
+  FileActionsApi,
+  NodesApi,
+  SharedLinksApi,
+  SitesApi,
+  test,
+  TEST_FILES,
+  timeouts,
+  Utils,
+  TrashcanApi,
+  PersonalFilesPage,
+  MyLibrariesPage,
+  RecentFilesPage,
+  FavoritesLibrariesPage,
+  SharedPage,
+  FavoritesPage
+} from '@alfresco/aca-playwright-shared';
+import { Site } from '@alfresco/js-api';
+
+test.describe('viewer zoom functionality and reset', () => {
+  const username = `user-${Utils.random()}`;
+  const randomJpgName = `${TEST_FILES.JPG_FILE.name}-${Utils.random()}.jpg`;
+  const randomPngName = `${TEST_FILES.PNG_FILE.name}-${Utils.random()}.png`;
+  const randomPdfName = `${TEST_FILES.PDF.name}-${Utils.random()}.pdf`;
+  const randomDocxName = `${TEST_FILES.DOCX.name}-${Utils.random()}.docx`;
+  const randomLibraryName = `playwright-library3-${Utils.random()}`;
+  let docLibId: string;
+  let folderId: string;
+  let siteActionsUser: SitesApi;
+  let trashcanApi: TrashcanApi;
+  let nodesApi: NodesApi;
+
+  test.beforeAll(async () => {
+    const apiClientFactory = new ApiClientFactory();
+    await apiClientFactory.setUpAcaBackend('admin');
+    try {
+      await apiClientFactory.createUser({ username });
+    } catch (exception) {
+      if (JSON.parse(exception.message).error.statusCode !== 409) {
+        throw new Error(`----- beforeAll failed : ${exception}`);
+      }
+    }
+
+    test.setTimeout(timeouts.extendedTest);
+    const randomFolderName = `viewer-${Utils.random()}`;
+    nodesApi = await NodesApi.initialize(username, username);
+    const fileActionApi = await FileActionsApi.initialize(username, username);
+    trashcanApi = await TrashcanApi.initialize(username, username);
+    siteActionsUser = await SitesApi.initialize(username, username);
+    const shareActions = await SharedLinksApi.initialize(username, username);
+    const favoritesActions = await FavoritesPageApi.initialize(username, username);
+    const node = await nodesApi.createFolder(randomFolderName);
+    folderId = node.entry.id;
+
+    try {
+      await siteActionsUser.createSite(randomLibraryName, Site.VisibilityEnum.PRIVATE);
+    } catch (exception) {
+      if (JSON.parse(exception.message).error.statusCode !== 409) {
+        throw new Error(`----- beforeAll failed : ${exception}`);
+      }
+    }
+
+    docLibId = await siteActionsUser.getDocLibId(randomLibraryName);
+
+    await fileActionApi.uploadFile(TEST_FILES.JPG_FILE.path, randomJpgName, folderId);
+    await fileActionApi.uploadFile(TEST_FILES.DOCX.path, randomDocxName, docLibId);
+    const filePngId = (await fileActionApi.uploadFile(TEST_FILES.PNG_FILE.path, randomPngName, folderId)).entry.id;
+    const filePdfId = (await fileActionApi.uploadFile(TEST_FILES.PDF.path, randomPdfName, folderId)).entry.id;
+
+    const consumerFavoritesTotalItems = await favoritesActions.getFavoritesTotalItems(username);
+    await shareActions.shareFileById(filePngId);
+    await favoritesActions.addFavoriteById('file', filePdfId);
+
+    await Promise.all([
+      favoritesActions.isFavoriteWithRetry(username, filePdfId, { expect: true }),
+      favoritesActions.waitForApi(username, { expect: consumerFavoritesTotalItems + 2 })
+    ]);
+    try {
+      await shareActions.waitForFilesToBeShared([filePngId]);
+      await fileActionApi.waitForNodes(randomPngName, { expect: 1 });
+    } catch (exception) {
+      if (JSON.parse(exception.message).error.statusCode !== 409) {
+        throw new Error(`----- beforeAll failed : ${exception}`);
+      }
+    }
+  });
+
+  test.beforeEach(async ({ personalFiles, loginPage }) => {
+    await Utils.tryLoginUser(loginPage, username, username, 'beforeEach failed');
+    await personalFiles.navigate({ remoteUrl: `#/personal-files/${folderId}` });
+  });
+
+  test.afterAll(async () => {
+    await Utils.deleteNodesSitesEmptyTrashcan(nodesApi, trashcanApi, 'afterAll failed', siteActionsUser, [docLibId]);
+  });
+
+  async function validateZoomScaleInViewer(
+    pageToValidate: PersonalFilesPage | RecentFilesPage | SharedPage | FavoritesLibrariesPage | MyLibrariesPage
+  ): Promise<void> {
+    const defaultZoomSize: number = parseInt(await pageToValidate.viewer.zoomScale.innerText(), 10);
+    expect(defaultZoomSize).toBe(100);
+    await pageToValidate.viewer.zoomInButton.click();
+    expect(parseInt(await pageToValidate.viewer.zoomScale.innerText(), 10)).toBeGreaterThan(defaultZoomSize);
+    await pageToValidate.viewer.zoomOutButton.click();
+    expect(parseInt(await pageToValidate.viewer.zoomScale.innerText(), 10)).toEqual(defaultZoomSize);
+    await pageToValidate.viewer.zoomOutButton.click();
+    expect(parseInt(await pageToValidate.viewer.zoomScale.innerText(), 10)).toBeLessThan(defaultZoomSize);
+    await pageToValidate.viewer.zoomInButton.click();
+    expect(parseInt(await pageToValidate.viewer.zoomScale.innerText(), 10)).toEqual(defaultZoomSize);
+  }
+
+  async function validateZoomResetButtonActivity(pageToValidate: PersonalFilesPage | RecentFilesPage | SharedPage): Promise<void> {
+    await pageToValidate.viewer.zoomInButton.click();
+    await pageToValidate.viewer.zoomResetButton.click();
+    expect(parseInt(await pageToValidate.viewer.zoomScale.innerText(), 10)).toEqual(100);
+    await pageToValidate.viewer.zoomInButton.click();
+    await pageToValidate.viewer.zoomResetButton.click();
+    expect(parseInt(await pageToValidate.viewer.zoomScale.innerText(), 10)).toEqual(100);
+  }
+
+  async function validateFitToPageButtonActivity(pageToValidate: FavoritesPage | MyLibrariesPage): Promise<void> {
+    await pageToValidate.viewer.zoomInButton.click();
+    await pageToValidate.viewer.fitToPageButton.click();
+    expect(parseInt(await pageToValidate.viewer.zoomScale.innerText(), 10)).toEqual(100);
+    await pageToValidate.viewer.zoomInButton.click();
+    await pageToValidate.viewer.fitToPageButton.click();
+    expect(parseInt(await pageToValidate.viewer.zoomScale.innerText(), 10)).toEqual(100);
+  }
+
+  test('[XAT-17637] Zoom functionality when a jpg image is opened in viewer mode in Personal Files', async ({ personalFiles }) => {
+    await personalFiles.dataTable.performClickFolderOrFileToOpen(randomJpgName);
+    expect(await personalFiles.viewer.isViewerOpened(), 'Viewer is not opened').toBe(true);
+    await validateZoomScaleInViewer(personalFiles);
+  });
+
+  test('[XAT-17650] Zoom functionality when a jpg file is opened in viewer mode in Recent Files', async ({ recentFilesPage }) => {
+    await recentFilesPage.navigate();
+    await recentFilesPage.dataTable.performClickFolderOrFileToOpen(randomJpgName);
+    expect(await recentFilesPage.viewer.isViewerOpened(), 'Viewer is not opened').toBe(true);
+    await validateZoomScaleInViewer(recentFilesPage);
+  });
+
+  test('[XAT-17638] Zoom functionality when a png image is opened in viewer mode in Shared Files', async ({ sharedPage }) => {
+    await sharedPage.navigate();
+    await sharedPage.dataTable.performClickFolderOrFileToOpen(randomPngName);
+    expect(await sharedPage.viewer.isViewerOpened(), 'Viewer is not opened').toBe(true);
+    await validateZoomScaleInViewer(sharedPage);
+  });
+
+  test('[XAT-17639] Zoom functionality when a pdf file is opened in viewer mode in Favorite Files', async ({ favoritePage }) => {
+    await favoritePage.navigate();
+    await favoritePage.dataTable.performClickFolderOrFileToOpen(randomPdfName);
+    expect(await favoritePage.viewer.isViewerOpened(), 'Viewer is not opened').toBe(true);
+    await favoritePage.viewer.waitForZoomPercentageToDisplay();
+    await validateZoomScaleInViewer(favoritePage);
+  });
+
+  test('[XAT-17640] Zoom functionality when a document is opened in viewer mode in Libraries Files', async ({ myLibrariesPage }) => {
+    await myLibrariesPage.navigate();
+    await myLibrariesPage.dataTable.performClickFolderOrFileToOpen(randomLibraryName);
+    await myLibrariesPage.dataTable.performClickFolderOrFileToOpen(randomDocxName);
+    await myLibrariesPage.viewer.waitForViewerLoaderToFinish();
+    expect(await myLibrariesPage.viewer.isViewerOpened(), 'Viewer is not opened').toBe(true);
+    await myLibrariesPage.viewer.waitForZoomPercentageToDisplay();
+    await validateZoomScaleInViewer(myLibrariesPage);
+  });
+
+  test('[XAT-17641] User can restore the default state of jpg image in viewer mode in Personal Files', async ({ personalFiles }) => {
+    await personalFiles.dataTable.performClickFolderOrFileToOpen(randomJpgName);
+    expect(await personalFiles.viewer.isViewerOpened(), 'Viewer is not opened').toBe(true);
+    await validateZoomResetButtonActivity(personalFiles);
+  });
+
+  test('[XAT-17651] User can restore the default state of jpg image in viewer mode in Recent Files', async ({ recentFilesPage }) => {
+    await recentFilesPage.navigate();
+    await recentFilesPage.dataTable.performClickFolderOrFileToOpen(randomJpgName);
+    expect(await recentFilesPage.viewer.isViewerOpened(), 'Viewer is not opened').toBe(true);
+    await validateZoomResetButtonActivity(recentFilesPage);
+  });
+
+  test('[XAT-17642] User can restore the default state of png image in viewer mode in Shared Files', async ({ sharedPage }) => {
+    await sharedPage.navigate();
+    await sharedPage.dataTable.performClickFolderOrFileToOpen(randomPngName);
+    expect(await sharedPage.viewer.isViewerOpened(), 'Viewer is not opened').toBe(true);
+    await validateZoomResetButtonActivity(sharedPage);
+  });
+
+  test('[XAT-17643] User can restore the default state of pdf file in viewer mode in Favorites Files', async ({ favoritePage }) => {
+    await favoritePage.navigate();
+    await favoritePage.dataTable.performClickFolderOrFileToOpen(randomPdfName);
+    expect(await favoritePage.viewer.isViewerOpened(), 'Viewer is not opened').toBe(true);
+    await favoritePage.viewer.waitForZoomPercentageToDisplay();
+    await validateFitToPageButtonActivity(favoritePage);
+  });
+
+  test('[XAT-17644] User can restore the default state of doc file in viewer mode in Libraries Files', async ({ myLibrariesPage }) => {
+    await myLibrariesPage.navigate();
+    await myLibrariesPage.dataTable.performClickFolderOrFileToOpen(randomLibraryName);
+    await myLibrariesPage.dataTable.performClickFolderOrFileToOpen(randomDocxName);
+    await myLibrariesPage.viewer.waitForViewerLoaderToFinish();
+    expect(await myLibrariesPage.viewer.isViewerOpened(), 'Viewer is not opened').toBe(true);
+    await myLibrariesPage.viewer.waitForZoomPercentageToDisplay();
+    await validateFitToPageButtonActivity(myLibrariesPage);
+  });
+});
diff --git a/projects/aca-playwright-shared/src/page-objects/components/viewer.component.ts b/projects/aca-playwright-shared/src/page-objects/components/viewer.component.ts
index c0ef673bd..62e87b33b 100644
--- a/projects/aca-playwright-shared/src/page-objects/components/viewer.component.ts
+++ b/projects/aca-playwright-shared/src/page-objects/components/viewer.component.ts
@@ -46,6 +46,11 @@ export class ViewerComponent extends BaseComponent {
   public viewerPage = this.getChild('[data-automation-id="adf-page-selector"]');
   public viewerMedia = this.getChild('adf-media-player');
   public viewerSpinner = this.getChild('.adf-viewer-render__loading-screen');
+  public zoomInButton = this.getChild('#viewer-zoom-in-button');
+  public zoomOutButton = this.getChild('#viewer-zoom-out-button');
+  public zoomScale = this.getChild('[data-automation-id="adf-page-scale"]');
+  public zoomResetButton = this.getChild('#viewer-reset-button');
+  public fitToPageButton = this.getChild('#viewer-scale-page-button');
 
   toolbar = new AcaHeader(this.page);
 
@@ -92,6 +97,24 @@ export class ViewerComponent extends BaseComponent {
     return this.fileTitleButtonLocator.isVisible();
   }
 
+  async waitForZoomPercentageToDisplay(): Promise<void> {
+    await this.zoomScale.waitFor({ state: 'visible', timeout: timeouts.normal });
+    const startTime = Date.now();
+    let textContent: string;
+
+    while (Date.now() - startTime <= timeouts.medium) {
+      textContent = await this.zoomScale.innerText();
+      if (textContent.trim() !== '') {
+        break;
+      }
+      await this.page.waitForTimeout(timeouts.tiny);
+    }
+
+    if (textContent.trim() === '') {
+      throw new Error(`Timeout: Text did not show up within ${timeouts.medium} ms`);
+    }
+  }
+
   async getFileTitle(): Promise<string> {
     await this.fileTitleButtonLocator.waitFor({ state: 'visible', timeout: timeouts.normal });
     await this.waitForViewerLoaderToFinish();
diff --git a/projects/aca-playwright-shared/src/utils/timeouts.ts b/projects/aca-playwright-shared/src/utils/timeouts.ts
index 8e05847a3..1362b976c 100644
--- a/projects/aca-playwright-shared/src/utils/timeouts.ts
+++ b/projects/aca-playwright-shared/src/utils/timeouts.ts
@@ -35,5 +35,5 @@ export const timeouts = {
   extendedTest: 150 * 1000,
   extendedLongTest: 200 * 1000,
   webServer: 240 * 1000,
-  globalSpec: 60 * 10 * 1000
+  globalSpec: 90 * 10 * 1000
 };