diff --git a/app/forms/user.py b/app/forms/user.py
index 4cd7853..18bf531 100644
--- a/app/forms/user.py
+++ b/app/forms/user.py
@@ -1,3 +1,5 @@
+import base64
+
 from flask_wtf import FlaskForm
 from wtforms import (
     StringField,
@@ -58,7 +60,7 @@ class NewUserForm(FlaskForm):
 
 class EditUserForm(FlaskForm):
     name = StringField("Name", [DataRequired()])
-    avatar_img = FileField("Avatar file (max 200x200px)")
+    avatar_img = FileField("Avatar file (max 1mb)")
     submit = SubmitField("Save")
 
     def validate_username(self, field):
@@ -69,6 +71,16 @@ class EditUserForm(FlaskForm):
         ):
             raise ValidationError("This username is taken.")
 
+    def validate_avatar_img(self, field):
+        if field.data:
+            img_data = field.data.read()
+            img_data = base64.b64encode(img_data)
+            img_data = img_data.decode("utf-8")
+            field.data = img_data
+            size = len(img_data) / 1000000
+            if size > 1:
+                raise ValidationError("Avatar file size too large")
+
 
 class ReactivateUserForm(FlaskForm):
     submit = SubmitField("Save")
diff --git a/app/templates/user/edit_profile.html b/app/templates/user/edit_profile.html
index 5152997..63085d7 100644
--- a/app/templates/user/edit_profile.html
+++ b/app/templates/user/edit_profile.html
@@ -35,19 +35,24 @@
              <div class="flex items-center mb-3">
               <div>
               {% if current_user.avatar_img %}
-                <img class=" w-14 h-14 rounded-full mr-3" src="data:image/jpeg;base64,{{ current_user.avatar_img }}" alt="user avatar">
+                <img class="w-14 h-14 rounded-full mr-3" src="data:image/jpeg;base64,{{ current_user.avatar_img }}" alt="user avatar">
               {% else %}
-                <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 56 56" stroke-width="1.5" stroke="currentColor" class="w-14 h-14"> <path stroke-linecap="round" stroke-linejoin="round" d="M17.982 18.725A7.488 7.488 0 0012 15.75a7.488 7.488 0 00-5.982 2.975m11.963 0a9 9 0 10-11.963 0m11.963 0A8.966 8.966 0 0112 21a8.966 8.966 0 01-5.982-2.275M15 9.75a3 3 0 11-6 0 3 3 0 016 0z" /> </svg>
+                <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" class="w-14 h-14 mr-2"> <path stroke-linecap="round" stroke-linejoin="round" d="M17.982 18.725A7.488 7.488 0 0012 15.75a7.488 7.488 0 00-5.982 2.975m11.963 0a9 9 0 10-11.963 0m11.963 0A8.966 8.966 0 0112 21a8.966 8.966 0 01-5.982-2.275M15 9.75a3 3 0 11-6 0 3 3 0 016 0z" /> </svg>
               {% endif %}
               </div>
               <div>
-              
+
               {{form.avatar_img(type='file', class='bg-gray-50 border border-gray-300 text-gray-900 text-sm rounded-lg focus:ring-blue-500 focus:border-blue-500 block w-full p-2.5 dark:bg-gray-700 dark:border-gray-600 dark:placeholder-gray-400 dark:text-white dark:focus:ring-blue-500 dark:focus:border-blue-500', id="avatar_img",
               value=current_user.avatar_img if current_user.avatar_img else "")}}</div>
             </div>
             <button type="submit" class="w-full px-5 py-3 text-base font-medium text-center text-white bg-blue-700 rounded-lg hover:bg-blue-800 focus:ring-4 focus:ring-blue-300 sm:w-auto dark:bg-blue-600 dark:hover:bg-blue-700 dark:focus:ring-blue-800">Save changes</button>
           </form>
-          <button type="button" data-modal-target="delete_profile_modal" data-modal-toggle="delete_profile_modal" class="text-red-700 hover:text-white border border-red-700 hover:bg-red-800 focus:ring-4 focus:outline-none focus:ring-red-300 font-medium rounded-lg text-sm px-5 py-2.5 text-center mr-2 mb-2 dark:border-red-500 dark:text-red-500 dark:hover:text-white dark:hover:bg-red-600 dark:focus:ring-red-900">Delete you profile</button>
+          <div class="flex">
+            <form action="{{ url_for('user.delete_avatar') }}" class="mb-0" method="POST">
+              <button type="submit" class="text-red-700 hover:text-white border border-red-700 hover:bg-red-800 focus:ring-4 focus:outline-none focus:ring-red-300 font-medium rounded-lg text-sm px-5 py-2.5 text-center mr-2 mb-2 dark:border-red-500 dark:text-red-500 dark:hover:text-white dark:hover:bg-red-600 dark:focus:ring-red-900">Delete Avatar</button>
+            </form>
+            <button type="button" data-modal-target="delete_profile_modal" data-modal-toggle="delete_profile_modal" class="text-red-700 hover:text-white border border-red-700 hover:bg-red-800 focus:ring-4 focus:outline-none focus:ring-red-300 font-medium rounded-lg text-sm px-5 py-2.5 text-center mr-2 mb-2 dark:border-red-500 dark:text-red-500 dark:hover:text-white dark:hover:bg-red-600 dark:focus:ring-red-900">Delete you profile</button>
+          </div>
         </div>
     </div>
   </div>
diff --git a/app/views/user.py b/app/views/user.py
index 0274a91..d36353a 100644
--- a/app/views/user.py
+++ b/app/views/user.py
@@ -40,9 +40,9 @@ def edit_profile():
         user: m.User = current_user
         user.username = form.name.data
         if form.avatar_img.data:
-            img_data = form.avatar_img.data.read()
-            img_data = base64.b64encode(img_data)
-            current_user.avatar_img = img_data.decode("utf-8")
+            current_user.avatar_img = (
+                form.avatar_img.data
+            )  # form.avatar_img.data is changed in form validator
         user.is_activated = True
         user.save()
         return redirect(url_for("main.index"))
@@ -58,6 +58,17 @@ def edit_profile():
     return render_template("user/edit_profile.html", form=form)
 
 
+@bp.route("/delete_avatar", methods=["POST"])
+@login_required
+def delete_avatar():
+    user: m.User = current_user
+    current_user.avatar_img = None
+    log(log.ERROR, "Delete user [%s] avatar", user)
+    current_user.save()
+
+    return redirect(url_for("user.edit_profile"))
+
+
 @bp.route("/<int:user_id>/profile")
 def profile(user_id: int):
     user: m.User = db.session.get(m.User, user_id)
diff --git a/tests/test_users.py b/tests/test_users.py
index dbade43..7b0c98e 100644
--- a/tests/test_users.py
+++ b/tests/test_users.py
@@ -133,6 +133,15 @@ def test_profile(client):
     assert res.status_code == 200
     assert str.encode(new_name) in res.data
 
+    # delete_avatar
+    assert user.avatar_img
+    res = client.post(
+        "/user/delete_avatar",
+        follow_redirects=True,
+    )
+    assert res
+    assert not user.avatar_img
+
     # delete_profile
     res = client.post(
         "/user/profile_delete",