diff --git a/packages/app-store/_utils/oauth/updateProfilePhotoGoogle.test.ts b/packages/app-store/_utils/oauth/updateProfilePhotoGoogle.test.ts
new file mode 100644
index 0000000000..a2cf7819f1
--- /dev/null
+++ b/packages/app-store/_utils/oauth/updateProfilePhotoGoogle.test.ts
@@ -0,0 +1,114 @@
+import { oauth2_v2 } from "@googleapis/oauth2";
+import type { OAuth2Client } from "googleapis-common";
+import { describe, it, expect, vi, beforeEach } from "vitest";
+
+import logger from "@calcom/lib/logger";
+import { uploadAvatar } from "@calcom/lib/server/avatar";
+import { UserRepository } from "@calcom/lib/server/repository/user";
+import { resizeBase64Image } from "@calcom/lib/server/resizeBase64Image";
+
+import { updateProfilePhotoGoogle } from "./updateProfilePhotoGoogle";
+
+vi.mock("@googleapis/oauth2", () => ({
+  oauth2_v2: {
+    Oauth2: vi.fn(),
+  },
+}));
+
+vi.mock("@calcom/lib/logger", () => ({
+  default: {
+    error: vi.fn(),
+  },
+}));
+
+vi.mock("@calcom/lib/server/avatar", () => ({
+  uploadAvatar: vi.fn(),
+}));
+
+vi.mock("@calcom/lib/server/resizeBase64Image", () => ({
+  resizeBase64Image: vi.fn(),
+}));
+
+vi.mock("@calcom/lib/server/repository/user", () => ({
+  UserRepository: {
+    updateAvatar: vi.fn(),
+  },
+}));
+
+describe("updateProfilePhotoGoogle", () => {
+  const mockOAuth2Client = {} as OAuth2Client;
+  const userId = 123;
+
+  let mockOauth2Instance: any;
+
+  beforeEach(() => {
+    vi.clearAllMocks();
+
+    mockOauth2Instance = {
+      userinfo: {
+        get: vi.fn(),
+      },
+    };
+
+    (oauth2_v2.Oauth2 as any).mockImplementation(() => mockOauth2Instance);
+    (uploadAvatar as any).mockResolvedValue("/api/avatar/processed-123.png");
+    (resizeBase64Image as any).mockResolvedValue("data:image/png;base64,resized-data");
+    (UserRepository.updateAvatar as any).mockResolvedValue(undefined);
+  });
+
+  it("should update avatar with valid URL", async () => {
+    const validUrl = "https://example.com/avatar.jpg";
+    mockOauth2Instance.userinfo.get.mockResolvedValue({
+      data: { picture: validUrl },
+    });
+
+    await updateProfilePhotoGoogle(mockOAuth2Client, userId);
+
+    expect(UserRepository.updateAvatar).toHaveBeenCalledWith({
+      id: userId,
+      avatarUrl: validUrl,
+    });
+    expect(uploadAvatar).not.toHaveBeenCalled();
+  });
+
+  it("should process base64 data", async () => {
+    const base64Data =
+      "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNkYAAAAAYAAjCB0C8AAAAASUVORK5CYII=";
+    mockOauth2Instance.userinfo.get.mockResolvedValue({
+      data: { picture: base64Data },
+    });
+
+    await updateProfilePhotoGoogle(mockOAuth2Client, userId);
+
+    expect(resizeBase64Image).toHaveBeenCalledWith(base64Data);
+    expect(uploadAvatar).toHaveBeenCalledWith({
+      avatar: "data:image/png;base64,resized-data",
+      userId,
+    });
+    expect(UserRepository.updateAvatar).toHaveBeenCalledWith({
+      id: userId,
+      avatarUrl: "/api/avatar/processed-123.png",
+    });
+  });
+
+  it("should do nothing when no picture provided", async () => {
+    mockOauth2Instance.userinfo.get.mockResolvedValue({
+      data: {},
+    });
+
+    await updateProfilePhotoGoogle(mockOAuth2Client, userId);
+
+    expect(UserRepository.updateAvatar).not.toHaveBeenCalled();
+    expect(uploadAvatar).not.toHaveBeenCalled();
+  });
+
+  it("should handle errors gracefully", async () => {
+    const error = new Error("OAuth API failed");
+    mockOauth2Instance.userinfo.get.mockRejectedValue(error);
+
+    await updateProfilePhotoGoogle(mockOAuth2Client, userId);
+
+    expect(logger.error).toHaveBeenCalledWith("Error updating avatarUrl from google calendar connect", error);
+    expect(UserRepository.updateAvatar).not.toHaveBeenCalled();
+  });
+});
diff --git a/packages/app-store/_utils/oauth/updateProfilePhotoGoogle.ts b/packages/app-store/_utils/oauth/updateProfilePhotoGoogle.ts
index 40b81b597e..2773e4ae80 100644
--- a/packages/app-store/_utils/oauth/updateProfilePhotoGoogle.ts
+++ b/packages/app-store/_utils/oauth/updateProfilePhotoGoogle.ts
@@ -1,6 +1,7 @@
 import { oauth2_v2 } from "@googleapis/oauth2";
 import type { OAuth2Client } from "googleapis-common";
 
+import { isBase64Image } from "@calcom/lib/isBase64Image";
 import logger from "@calcom/lib/logger";
 import { uploadAvatar } from "@calcom/lib/server/avatar";
 import { UserRepository } from "@calcom/lib/server/repository/user";
@@ -16,11 +17,7 @@ export async function updateProfilePhotoGoogle(oAuth2Client: OAuth2Client, userI
     }
 
     // Handle base64 data
-    if (
-      avatarUrl.startsWith("data:image/png;base64,") ||
-      avatarUrl.startsWith("data:image/jpeg;base64,") ||
-      avatarUrl.startsWith("data:image/jpg;base64,")
-    ) {
+    if (isBase64Image(avatarUrl)) {
       const resizedAvatarUrl = await uploadAvatar({
         avatar: await resizeBase64Image(avatarUrl),
         userId,
diff --git a/packages/lib/isBase64Image.ts b/packages/lib/isBase64Image.ts
new file mode 100644
index 0000000000..1fdb482b3d
--- /dev/null
+++ b/packages/lib/isBase64Image.ts
@@ -0,0 +1,12 @@
+/**
+ * Checks if a string is a supported base64 image format
+ */
+export function isBase64Image(input: string | null | undefined): boolean {
+  if (!input) return false;
+
+  return (
+    input.startsWith("data:image/png;base64,") ||
+    input.startsWith("data:image/jpeg;base64,") ||
+    input.startsWith("data:image/jpg;base64,")
+  );
+}
diff --git a/packages/trpc/server/routers/viewer/me/updateProfile.handler.ts b/packages/trpc/server/routers/viewer/me/updateProfile.handler.ts
index 1d93cdfade..7a00418512 100644
--- a/packages/trpc/server/routers/viewer/me/updateProfile.handler.ts
+++ b/packages/trpc/server/routers/viewer/me/updateProfile.handler.ts
@@ -9,6 +9,7 @@ import { StripeBillingService } from "@calcom/features/ee/billing/stripe-billlin
 import { FeaturesRepository } from "@calcom/features/flags/features.repository";
 import hasKeyInMetadata from "@calcom/lib/hasKeyInMetadata";
 import { HttpError } from "@calcom/lib/http-error";
+import { isBase64Image } from "@calcom/lib/isBase64Image";
 import logger from "@calcom/lib/logger";
 import { uploadAvatar } from "@calcom/lib/server/avatar";
 import { checkUsername } from "@calcom/lib/server/checkUsername";
@@ -152,12 +153,7 @@ export const updateProfileHandler = async ({ ctx, input }: UpdateProfileOptions)
   }
 
   // if defined AND a base 64 string, upload and update the avatar URL
-  if (
-    input.avatarUrl &&
-    (input.avatarUrl.startsWith("data:image/png;base64,") ||
-      input.avatarUrl.startsWith("data:image/jpeg;base64,") ||
-      input.avatarUrl.startsWith("data:image/jpg;base64,"))
-  ) {
+  if (input.avatarUrl && isBase64Image(input.avatarUrl)) {
     data.avatarUrl = await uploadAvatar({
       avatar: await resizeBase64Image(input.avatarUrl),
       userId: user.id,
diff --git a/packages/trpc/server/routers/viewer/organizations/update.handler.ts b/packages/trpc/server/routers/viewer/organizations/update.handler.ts
index 5f1beff0e0..98460451ea 100644
--- a/packages/trpc/server/routers/viewer/organizations/update.handler.ts
+++ b/packages/trpc/server/routers/viewer/organizations/update.handler.ts
@@ -2,6 +2,7 @@ import type { Prisma } from "@prisma/client";
 
 import { IS_TEAM_BILLING_ENABLED } from "@calcom/lib/constants";
 import { getMetadataHelpers } from "@calcom/lib/getMetadataHelpers";
+import { isBase64Image } from "@calcom/lib/isBase64Image";
 import { uploadLogo } from "@calcom/lib/server/avatar";
 import { isOrganisationAdmin } from "@calcom/lib/server/queries/organisations";
 import { resizeBase64Image } from "@calcom/lib/server/resizeBase64Image";
@@ -161,12 +162,7 @@ export const updateHandler = async ({ ctx, input }: UpdateOptions) => {
     metadata: mergeMetadata({ ...input.metadata }),
   };
 
-  if (
-    input.banner &&
-    (input.banner.startsWith("data:image/png;base64,") ||
-      input.banner.startsWith("data:image/jpeg;base64,") ||
-      input.banner.startsWith("data:image/jpg;base64,"))
-  ) {
+  if (input.banner && isBase64Image(input.banner)) {
     const banner = await resizeBase64Image(input.banner, { maxSize: 1500 });
     data.bannerUrl = await uploadLogo({
       logo: banner,
@@ -177,12 +173,7 @@ export const updateHandler = async ({ ctx, input }: UpdateOptions) => {
     data.bannerUrl = null;
   }
 
-  if (
-    input.logoUrl &&
-    (input.logoUrl.startsWith("data:image/png;base64,") ||
-      input.logoUrl.startsWith("data:image/jpeg;base64,") ||
-      input.logoUrl.startsWith("data:image/jpg;base64,"))
-  ) {
+  if (input.logoUrl && isBase64Image(input.logoUrl)) {
     data.logoUrl = await uploadLogo({
       logo: await resizeBase64Image(input.logoUrl),
       teamId: currentOrgId,
diff --git a/packages/trpc/server/routers/viewer/organizations/updateUser.handler.ts b/packages/trpc/server/routers/viewer/organizations/updateUser.handler.ts
index ae8d6f4171..c0d49b7ea2 100644
--- a/packages/trpc/server/routers/viewer/organizations/updateUser.handler.ts
+++ b/packages/trpc/server/routers/viewer/organizations/updateUser.handler.ts
@@ -2,6 +2,7 @@ import type { Prisma, PrismaPromise, User, Membership, Profile } from "@prisma/c
 
 import { ensureOrganizationIsReviewed } from "@calcom/ee/organizations/lib/ensureOrganizationIsReviewed";
 import { checkAdminOrOwner } from "@calcom/features/auth/lib/checkAdminOrOwner";
+import { isBase64Image } from "@calcom/lib/isBase64Image";
 import { uploadAvatar } from "@calcom/lib/server/avatar";
 import { checkRegularUsername } from "@calcom/lib/server/checkRegularUsername";
 import { isOrganisationAdmin, isOrganisationOwner } from "@calcom/lib/server/queries/organisations";
@@ -119,12 +120,7 @@ export const updateUserHandler = async ({ ctx, input }: UpdateUserOptions) => {
     timeZone: input.timeZone,
   };
 
-  if (
-    input.avatar &&
-    (input.avatar.startsWith("data:image/png;base64,") ||
-      input.avatar.startsWith("data:image/jpeg;base64,") ||
-      input.avatar.startsWith("data:image/jpg;base64,"))
-  ) {
+  if (input.avatar && isBase64Image(input.avatar)) {
     const avatar = await resizeBase64Image(input.avatar);
     data.avatarUrl = await uploadAvatar({
       avatar,
diff --git a/packages/trpc/server/routers/viewer/teams/create.handler.ts b/packages/trpc/server/routers/viewer/teams/create.handler.ts
index 96f0e551cc..1313d4b4d3 100644
--- a/packages/trpc/server/routers/viewer/teams/create.handler.ts
+++ b/packages/trpc/server/routers/viewer/teams/create.handler.ts
@@ -1,5 +1,6 @@
 import { generateTeamCheckoutSession } from "@calcom/features/ee/teams/lib/payments";
 import { IS_TEAM_BILLING_ENABLED, WEBAPP_URL } from "@calcom/lib/constants";
+import { isBase64Image } from "@calcom/lib/isBase64Image";
 import { uploadLogo } from "@calcom/lib/server/avatar";
 import { ProfileRepository } from "@calcom/lib/server/repository/profile";
 import { resizeBase64Image } from "@calcom/lib/server/resizeBase64Image";
@@ -106,12 +107,7 @@ export const createHandler = async ({ ctx, input }: CreateOptions) => {
     },
   });
   // Upload logo, create doesn't allow logo removal
-  if (
-    input.logo &&
-    (input.logo.startsWith("data:image/png;base64,") ||
-      input.logo.startsWith("data:image/jpeg;base64,") ||
-      input.logo.startsWith("data:image/jpg;base64,"))
-  ) {
+  if (input.logo && isBase64Image(input.logo)) {
     const logoUrl = await uploadLogo({
       logo: await resizeBase64Image(input.logo),
       teamId: createdTeam.id,
diff --git a/packages/trpc/server/routers/viewer/teams/update.handler.ts b/packages/trpc/server/routers/viewer/teams/update.handler.ts
index 75dd5d92f1..aa08d7c4a2 100644
--- a/packages/trpc/server/routers/viewer/teams/update.handler.ts
+++ b/packages/trpc/server/routers/viewer/teams/update.handler.ts
@@ -4,6 +4,7 @@ import { getOrgFullOrigin } from "@calcom/ee/organizations/lib/orgDomains";
 import { IS_TEAM_BILLING_ENABLED } from "@calcom/lib/constants";
 import type { IntervalLimit } from "@calcom/lib/intervalLimits/intervalLimitSchema";
 import { validateIntervalLimitOrder } from "@calcom/lib/intervalLimits/validateIntervalLimitOrder";
+import { isBase64Image } from "@calcom/lib/isBase64Image";
 import { uploadLogo } from "@calcom/lib/server/avatar";
 import { isTeamAdmin } from "@calcom/lib/server/queries/teams";
 import { prisma } from "@calcom/prisma";
@@ -70,12 +71,7 @@ export const updateHandler = async ({ ctx, input }: UpdateOptions) => {
     rrTimestampBasis: input.rrTimestampBasis,
   };
 
-  if (
-    input.logo &&
-    (input.logo.startsWith("data:image/png;base64,") ||
-      input.logo.startsWith("data:image/jpeg;base64,") ||
-      input.logo.startsWith("data:image/jpg;base64,"))
-  ) {
+  if (input.logo && isBase64Image(input.logo)) {
     data.logoUrl = await uploadLogo({ teamId: input.id, logo: input.logo });
   } else if (typeof input.logo !== "undefined" && !input.logo) {
     data.logoUrl = null;