diff --git a/src/components/Sidebar.vue b/src/components/Sidebar.vue
index 0f0ec7f..9b7f4db 100644
--- a/src/components/Sidebar.vue
+++ b/src/components/Sidebar.vue
@@ -32,6 +32,7 @@ export default {
         'fix_ru_en_keyboard': 'Fix ru-en keyboard',
         'str_length': 'Str length',
         'str_to_lower_upper': 'Str to lower/upper',
+        'str_remove_duplicate_lines': 'Str remove duplicate lines',
       },
       'SQL': {
         'sql_split_in': 'SQL split IN',
diff --git a/src/router/index.js b/src/router/index.js
index 306b9f7..78751cd 100644
--- a/src/router/index.js
+++ b/src/router/index.js
@@ -25,6 +25,11 @@ const router = createRouter({
 			name: 'str_to_lower_upper',
 			component: () => import('../views/StrToLowerUppper.vue'),
 		},
+		{
+			path: '/str_remove_duplicate_lines',
+			name: 'str_remove_duplicate_lines',
+			component: () => import('../views/StrRemoveDuplicateLines.vue'),
+		},
 		{
 			path: '/fix_ru_en_keyboard',
 			name: 'fix_ru_en_keyboard',
diff --git a/src/views/StrRemoveDuplicateLines.vue b/src/views/StrRemoveDuplicateLines.vue
new file mode 100644
index 0000000..ce45614
--- /dev/null
+++ b/src/views/StrRemoveDuplicateLines.vue
@@ -0,0 +1,41 @@
+<template>
+  <h2 class="tool-title">Str remove duplicate lines</h2>
+  <hr class="mt-5 mb-5">
+
+  <div class="input-group">
+    <label for="data">Data</label>
+    <textarea id="data" v-model="toolData.data" style="height: 150px"></textarea>
+  </div>
+
+  <hr class="mt-5 mb-5">
+
+  <div class="input-group">
+    <label for="result">Result</label>
+    <textarea id="result" v-model="toolResult" style="height: 150px"></textarea>
+  </div>
+</template>
+
+<script>
+function arrayUnique(value, index, array) {
+  return array.indexOf(value) === index;
+}
+
+export default {
+  data() {
+    return {
+      toolData: {
+        data: '',
+      },
+    };
+  },
+  computed: {
+    toolResult() {
+      return this.toolData.data.split('\n').filter(arrayUnique).join('\n');
+    },
+  },
+}
+</script>
+
+<style lang="scss">
+
+</style>
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