diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index cc7f5ee..1a60bd3 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -4,12 +4,10 @@
     <option name="autoReloadType" value="SELECTIVE" />
   </component>
   <component name="ChangeListManager">
-    <list default="true" id="b30e2810-c4c1-4aad-b134-794e52cc1c7d" name="Changes" comment="feat: reverse list ui">
-      <change afterPath="$PROJECT_DIR$/.dockerignore" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/Dockerfile" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/img.png" afterDir="false" />
+    <list default="true" id="b30e2810-c4c1-4aad-b134-794e52cc1c7d" name="Changes" comment="feat: self host">
+      <change afterPath="$PROJECT_DIR$/src/utils/number.ts" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/README.md" beforeDir="false" afterPath="$PROJECT_DIR$/README.md" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/pages/list/group/index.tsx" beforeDir="false" afterPath="$PROJECT_DIR$/src/pages/list/group/index.tsx" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
@@ -31,9 +29,9 @@
     <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$" />
     <option name="RESET_MODE" value="HARD" />
   </component>
-  <component name="KubernetesApiProvider"><![CDATA[{
-  "isMigrated": true
-}]]></component>
+  <component name="KubernetesApiProvider">{
+  &quot;isMigrated&quot;: true
+}</component>
   <component name="MarkdownSettingsMigration">
     <option name="stateVersion" value="1" />
   </component>
@@ -49,46 +47,46 @@
     <option name="hideEmptyMiddlePackages" value="true" />
     <option name="showLibraryContents" value="true" />
   </component>
-  <component name="PropertiesComponent"><![CDATA[{
-  "keyToString": {
-    "ASKED_ADD_EXTERNAL_FILES": "true",
-    "ASKED_SHARE_PROJECT_CONFIGURATION_FILES": "true",
-    "Docker.Dockerfile build.executor": "Run",
-    "Docker.Dockerfile.executor": "Run",
-    "Playwright.JoinText Component.executor": "Run",
-    "Playwright.JoinText Component.should merge text pieces with specified join character.executor": "Run",
-    "RunOnceActivity.OpenProjectViewOnStart": "true",
-    "RunOnceActivity.ShowReadmeOnStart": "true",
-    "Vitest.compute function (1).executor": "Run",
-    "Vitest.compute function.executor": "Run",
-    "Vitest.mergeText.executor": "Run",
-    "Vitest.mergeText.should merge lines and preserve blank lines when deleteBlankLines is false.executor": "Run",
-    "Vitest.mergeText.should merge lines, preserve blank lines and trailing spaces when both deleteBlankLines and deleteTrailingSpaces are false.executor": "Run",
-    "git-widget-placeholder": "main",
-    "ignore.virus.scanning.warn.message": "true",
-    "kotlin-language-version-configured": "true",
-    "last_opened_file_path": "C:/Users/HP/IdeaProjects/omni-tools/src/components/options",
-    "node.js.detected.package.eslint": "true",
-    "node.js.detected.package.tslint": "true",
-    "node.js.selected.package.eslint": "(autodetect)",
-    "node.js.selected.package.tslint": "(autodetect)",
-    "nodejs_package_manager_path": "npm",
-    "npm.dev.executor": "Run",
-    "npm.lint.executor": "Run",
-    "npm.prebuild.executor": "Run",
-    "npm.script:create:tool.executor": "Run",
-    "npm.test.executor": "Run",
-    "npm.test:e2e.executor": "Run",
-    "npm.test:e2e:run.executor": "Run",
-    "prettierjs.PrettierConfiguration.Package": "C:\\Users\\HP\\IdeaProjects\\omni-tools\\node_modules\\prettier",
-    "project.structure.last.edited": "Problems",
-    "project.structure.proportion": "0.0",
-    "project.structure.side.proportion": "0.2",
-    "settings.editor.selected.configurable": "settings.typescriptcompiler",
-    "ts.external.directory.path": "C:\\Users\\HP\\IdeaProjects\\omni-tools\\node_modules\\typescript\\lib",
-    "vue.rearranger.settings.migration": "true"
+  <component name="PropertiesComponent">{
+  &quot;keyToString&quot;: {
+    &quot;ASKED_ADD_EXTERNAL_FILES&quot;: &quot;true&quot;,
+    &quot;ASKED_SHARE_PROJECT_CONFIGURATION_FILES&quot;: &quot;true&quot;,
+    &quot;Docker.Dockerfile build.executor&quot;: &quot;Run&quot;,
+    &quot;Docker.Dockerfile.executor&quot;: &quot;Run&quot;,
+    &quot;Playwright.JoinText Component.executor&quot;: &quot;Run&quot;,
+    &quot;Playwright.JoinText Component.should merge text pieces with specified join character.executor&quot;: &quot;Run&quot;,
+    &quot;RunOnceActivity.OpenProjectViewOnStart&quot;: &quot;true&quot;,
+    &quot;RunOnceActivity.ShowReadmeOnStart&quot;: &quot;true&quot;,
+    &quot;Vitest.compute function (1).executor&quot;: &quot;Run&quot;,
+    &quot;Vitest.compute function.executor&quot;: &quot;Run&quot;,
+    &quot;Vitest.mergeText.executor&quot;: &quot;Run&quot;,
+    &quot;Vitest.mergeText.should merge lines and preserve blank lines when deleteBlankLines is false.executor&quot;: &quot;Run&quot;,
+    &quot;Vitest.mergeText.should merge lines, preserve blank lines and trailing spaces when both deleteBlankLines and deleteTrailingSpaces are false.executor&quot;: &quot;Run&quot;,
+    &quot;git-widget-placeholder&quot;: &quot;main&quot;,
+    &quot;ignore.virus.scanning.warn.message&quot;: &quot;true&quot;,
+    &quot;kotlin-language-version-configured&quot;: &quot;true&quot;,
+    &quot;last_opened_file_path&quot;: &quot;C:/Users/HP/IdeaProjects/omni-tools/src/components/options&quot;,
+    &quot;node.js.detected.package.eslint&quot;: &quot;true&quot;,
+    &quot;node.js.detected.package.tslint&quot;: &quot;true&quot;,
+    &quot;node.js.selected.package.eslint&quot;: &quot;(autodetect)&quot;,
+    &quot;node.js.selected.package.tslint&quot;: &quot;(autodetect)&quot;,
+    &quot;nodejs_package_manager_path&quot;: &quot;npm&quot;,
+    &quot;npm.dev.executor&quot;: &quot;Run&quot;,
+    &quot;npm.lint.executor&quot;: &quot;Run&quot;,
+    &quot;npm.prebuild.executor&quot;: &quot;Run&quot;,
+    &quot;npm.script:create:tool.executor&quot;: &quot;Run&quot;,
+    &quot;npm.test.executor&quot;: &quot;Run&quot;,
+    &quot;npm.test:e2e.executor&quot;: &quot;Run&quot;,
+    &quot;npm.test:e2e:run.executor&quot;: &quot;Run&quot;,
+    &quot;prettierjs.PrettierConfiguration.Package&quot;: &quot;C:\\Users\\HP\\IdeaProjects\\omni-tools\\node_modules\\prettier&quot;,
+    &quot;project.structure.last.edited&quot;: &quot;Problems&quot;,
+    &quot;project.structure.proportion&quot;: &quot;0.0&quot;,
+    &quot;project.structure.side.proportion&quot;: &quot;0.2&quot;,
+    &quot;settings.editor.selected.configurable&quot;: &quot;settings.typescriptcompiler&quot;,
+    &quot;ts.external.directory.path&quot;: &quot;C:\\Users\\HP\\IdeaProjects\\omni-tools\\node_modules\\typescript\\lib&quot;,
+    &quot;vue.rearranger.settings.migration&quot;: &quot;true&quot;
   }
-}]]></component>
+}</component>
   <component name="ReactDesignerToolWindowState">
     <option name="myId2Visible">
       <map>
@@ -113,7 +111,7 @@
       <recent name="C:\Users\HP\IdeaProjects\omni-tools\src\tools" />
     </key>
   </component>
-  <component name="RunManager" selected="Docker.Dockerfile">
+  <component name="RunManager" selected="npm.dev">
     <configuration name="Dockerfile build" type="docker-deploy" factoryName="dockerfile" temporary="true" server-name="Docker">
       <deployment type="dockerfile">
         <settings>
@@ -180,9 +178,9 @@
     </list>
     <recent_temporary>
       <list>
+        <item itemvalue="npm.dev" />
         <item itemvalue="Docker.Dockerfile build" />
         <item itemvalue="Docker.Dockerfile" />
-        <item itemvalue="npm.dev" />
         <item itemvalue="npm.lint" />
         <item itemvalue="npm.test:e2e" />
       </list>
@@ -225,15 +223,8 @@
       <workItem from="1720564427492" duration="1523000" />
       <workItem from="1720613598176" duration="8000" />
       <workItem from="1720655252208" duration="3975000" />
-      <workItem from="1720661825389" duration="3107000" />
-    </task>
-    <task id="LOCAL-00046" summary="feat: change colors in png init">
-      <option name="closed" value="true" />
-      <created>1719193884293</created>
-      <option name="number" value="00046" />
-      <option name="presentableId" value="LOCAL-00046" />
-      <option name="project" value="LOCAL" />
-      <updated>1719193884293</updated>
+      <workItem from="1720661825389" duration="4305000" />
+      <workItem from="1720729165596" duration="730000" />
     </task>
     <task id="LOCAL-00047" summary="feat: change colors in png">
       <option name="closed" value="true" />
@@ -619,7 +610,15 @@
       <option name="project" value="LOCAL" />
       <updated>1720658257129</updated>
     </task>
-    <option name="localTasksCounter" value="95" />
+    <task id="LOCAL-00095" summary="feat: self host">
+      <option name="closed" value="true" />
+      <created>1720665220407</created>
+      <option name="number" value="00095" />
+      <option name="presentableId" value="LOCAL-00095" />
+      <option name="project" value="LOCAL" />
+      <updated>1720665220408</updated>
+    </task>
+    <option name="localTasksCounter" value="96" />
     <servers />
   </component>
   <component name="TypeScriptGeneratedFilesManager">
@@ -663,7 +662,6 @@
     <option name="CHECK_CODE_SMELLS_BEFORE_PROJECT_COMMIT" value="false" />
     <option name="CHECK_NEW_TODO" value="false" />
     <option name="ADD_EXTERNAL_FILES_SILENTLY" value="true" />
-    <MESSAGE value="feat: make tool responsive" />
     <MESSAGE value="chore: make tool examples responsive" />
     <MESSAGE value="chore: loading screen" />
     <MESSAGE value="chore: shuffle tools search" />
@@ -688,7 +686,8 @@
     <MESSAGE value="feat: find unique ui" />
     <MESSAGE value="feat: group list ui" />
     <MESSAGE value="feat: reverse list ui" />
-    <option name="LAST_COMMIT_MESSAGE" value="feat: reverse list ui" />
+    <MESSAGE value="feat: self host" />
+    <option name="LAST_COMMIT_MESSAGE" value="feat: self host" />
   </component>
   <component name="XSLT-Support.FileAssociations.UIState">
     <expand />
diff --git a/src/pages/list/group/index.tsx b/src/pages/list/group/index.tsx
index 73ea11f..c5cebbd 100644
--- a/src/pages/list/group/index.tsx
+++ b/src/pages/list/group/index.tsx
@@ -9,6 +9,7 @@ import ToolInputAndResult from '../../../components/ToolInputAndResult';
 import SimpleRadio from '../../../components/options/SimpleRadio';
 import TextFieldWithDesc from '../../../components/options/TextFieldWithDesc';
 import CheckboxWithDesc from '../../../components/options/CheckboxWithDesc';
+import { formatNumber } from '../../../utils/number';
 
 const initialValues = {
   splitOperatorType: 'symbol' as SplitOperatorType,
@@ -121,7 +122,7 @@ export default function FindUnique() {
                   description={'Number of items in a group'}
                   type={'number'}
                   onOwnChange={(value) =>
-                    updateField('groupNumber', Number(value))
+                    updateField('groupNumber', formatNumber(value, 1))
                   }
                 />
                 <TextFieldWithDesc
diff --git a/src/utils/number.ts b/src/utils/number.ts
new file mode 100644
index 0000000..eef6203
--- /dev/null
+++ b/src/utils/number.ts
@@ -0,0 +1,11 @@
+export function formatNumber(
+  num: number | string,
+  fallback: number = 0
+): number {
+  if (!num) return fallback;
+  const result: number = Number(num);
+  if (!result) {
+    return fallback;
+  }
+  return result >= 0 ? result : fallback;
+}