diff --git a/actions/profile.ts b/actions/profile.ts
index bf47cb4..be389be 100644
--- a/actions/profile.ts
+++ b/actions/profile.ts
@@ -8,7 +8,7 @@ import { revalidatePath } from "next/cache";
 import { db } from "@/lib/db";
 import { DEFAULT_THEME_ID } from "@/lib/constants";
 import { requireCurrentUser } from "@/lib/session";
-import { normalizeUsername, safeUrl, sanitizeOptionalPlainText, sanitizePlainText } from "@/lib/sanitize";
+import { normalizeUsername, sanitizeOptionalPlainText, sanitizePlainText } from "@/lib/sanitize";
 import { profileSchema } from "@/lib/validators/profile";
 
 export type ActionResult = {
@@ -81,12 +81,7 @@ export async function updateProfileAction(formData: FormData): Promise<ActionRes
   const currentUsername = user.profile?.username;
   const existingAvatarUrl = user.profile?.avatarUrl ?? null;
   const avatarFile = formData.get("avatarFile");
-  const rawAvatarUrl = String(formData.get("avatarUrl") ?? "");
-  const sanitizedAvatarUrl = rawAvatarUrl.startsWith(AVATAR_WEB_PREFIX)
-    ? rawAvatarUrl
-    : (safeUrl(rawAvatarUrl) ?? "");
-
-  let nextAvatarUrl = sanitizedAvatarUrl;
+  let nextAvatarUrl = existingAvatarUrl ?? "";
   let uploadedAvatarUrl: string | null = null;
 
   if (avatarFile instanceof File && avatarFile.size > 0) {
@@ -165,3 +160,36 @@ export async function updateProfileAction(formData: FormData): Promise<ActionRes
     return { success: false, message: "Could not update profile" };
   }
 }
+
+export async function resetAvatarAction(): Promise<ActionResult> {
+  const user = await requireCurrentUser();
+  const currentUsername = user.profile?.username;
+  const existingAvatarUrl = user.profile?.avatarUrl ?? null;
+
+  if (!user.profile) {
+    return { success: false, message: "Profile not found" };
+  }
+
+  if (!existingAvatarUrl) {
+    return { success: true, message: "Avatar is already empty" };
+  }
+
+  try {
+    await db.profile.update({
+      where: { userId: user.id },
+      data: { avatarUrl: null }
+    });
+
+    await deleteOldUploadedAvatar(existingAvatarUrl);
+
+    if (currentUsername) {
+      revalidatePath(`/u/${currentUsername}`);
+    }
+    revalidatePath("/dashboard");
+    revalidatePath("/dashboard/profile");
+
+    return { success: true, message: "Avatar reset" };
+  } catch {
+    return { success: false, message: "Could not reset avatar" };
+  }
+}
diff --git a/app/(dashboard)/dashboard/profile/page.tsx b/app/(dashboard)/dashboard/profile/page.tsx
index ffc913b..f03ecb0 100644
--- a/app/(dashboard)/dashboard/profile/page.tsx
+++ b/app/(dashboard)/dashboard/profile/page.tsx
@@ -26,7 +26,6 @@ export default async function DashboardProfilePage() {
           username: profile?.username ?? "",
           displayName: profile?.displayName ?? "",
           bio: profile?.bio ?? "",
-          avatarUrl: profile?.avatarUrl ?? "",
           themeId: profile?.themeId ?? DEFAULT_THEME_ID,
           isPublic: profile?.isPublic ?? true
         }}
diff --git a/components/dashboard/profile-form.tsx b/components/dashboard/profile-form.tsx
index a7196f1..d8ccb95 100644
--- a/components/dashboard/profile-form.tsx
+++ b/components/dashboard/profile-form.tsx
@@ -1,7 +1,7 @@
 "use client";
 
 import { FormEvent, useState, useTransition } from "react";
-import { updateProfileAction } from "@/actions/profile";
+import { resetAvatarAction, updateProfileAction } from "@/actions/profile";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
 import { Select } from "@/components/ui/select";
@@ -18,7 +18,6 @@ type ProfileFormProps = {
     username: string;
     displayName: string;
     bio: string;
-    avatarUrl: string;
     themeId: string;
     isPublic: boolean;
   };
@@ -33,11 +32,23 @@ export function ProfileForm({ initialValues, themes }: ProfileFormProps) {
   const [username, setUsername] = useState(initialValues.username);
   const [displayName, setDisplayName] = useState(initialValues.displayName);
   const [bio, setBio] = useState(initialValues.bio);
-  const [avatarUrl, setAvatarUrl] = useState(initialValues.avatarUrl);
   const [avatarFile, setAvatarFile] = useState<File | null>(null);
   const [themeId, setThemeId] = useState(initialValues.themeId);
   const [isPublic, setIsPublic] = useState(initialValues.isPublic);
 
+  function handleResetAvatar() {
+    setMessage(null);
+
+    startTransition(async () => {
+      const result = await resetAvatarAction();
+      setMessage(result.message);
+      setIsError(!result.success);
+      if (result.success) {
+        setAvatarFile(null);
+      }
+    });
+  }
+
   function onSubmit(event: FormEvent<HTMLFormElement>) {
     event.preventDefault();
     setMessage(null);
@@ -46,7 +57,6 @@ export function ProfileForm({ initialValues, themes }: ProfileFormProps) {
     formData.set("username", username);
     formData.set("displayName", displayName);
     formData.set("bio", bio);
-    formData.set("avatarUrl", avatarUrl);
     if (avatarFile) {
       formData.set("avatarFile", avatarFile);
     }
@@ -103,16 +113,17 @@ export function ProfileForm({ initialValues, themes }: ProfileFormProps) {
           onChange={(event) => setAvatarFile(event.target.files?.[0] ?? null)}
         />
       </label>
-
-      <label className="space-y-2 text-sm">
-        <span className="form-label">Avatar URL</span>
-        <Input
-          type="url"
-          placeholder="https://..."
-          value={avatarUrl}
-          onChange={(event) => setAvatarUrl(event.target.value)}
-        />
-      </label>
+      <div style={{ marginTop: 16, marginBottom: 20 }}>
+        <Button
+          type="button"
+          variant="secondary"
+          className="dashboard-action min-h-11 px-5"
+          disabled={isPending}
+          onClick={handleResetAvatar}
+        >
+          Reset avatar
+        </Button>
+      </div>
 
       <label className="space-y-2 text-sm">
         <span className="form-label">Theme</span>
diff --git a/lib/validators/profile.ts b/lib/validators/profile.ts
index a76943f..91093f4 100644
--- a/lib/validators/profile.ts
+++ b/lib/validators/profile.ts
@@ -17,18 +17,8 @@ export const profileSchema = z.object({
       if (!value) {
         return true;
       }
-
-      if (value.startsWith("/uploads/avatars/")) {
-        return true;
-      }
-
-      try {
-        const url = new URL(value);
-        return url.protocol === "http:" || url.protocol === "https:";
-      } catch {
-        return false;
-      }
-    }, "Avatar must be a valid URL or uploaded file path")
+      return value.startsWith("/uploads/avatars/");
+    }, "Avatar must be an uploaded file path")
     .optional()
     .or(z.literal("")),
   themeId: z.string().trim().min(1),