diff --git a/src/tools/css-prettifier/css-prettifier.vue b/src/tools/css-prettifier/css-prettifier.vue
new file mode 100644
index 00000000..71091590
--- /dev/null
+++ b/src/tools/css-prettifier/css-prettifier.vue
@@ -0,0 +1,37 @@
+<script setup lang="ts">
+import beautify from 'js-beautify';
+import TextareaCopyable from '@/components/TextareaCopyable.vue';
+
+const inputCSS = ref('');
+const outputCSS = computed(() => {
+  return beautify.css(inputCSS.value, {
+    indent_char: ' ',
+    indent_size: 2,
+    sep: '\n',
+  });
+});
+</script>
+
+<template>
+  <div>
+    <c-input-text
+      v-model:value="inputCSS"
+      multiline raw-text
+      placeholder="Your CSS content..."
+      rows="8"
+      autofocus
+      label="Your CSS to format (can paste from clipboard):"
+    />
+
+    <n-divider />
+
+    <n-form-item label="Output prettified CSS:">
+      <TextareaCopyable
+        :value="outputCSS"
+        multiline
+        language="css"
+        word-wrap
+      />
+    </n-form-item>
+  </div>
+</template>
diff --git a/src/tools/css-prettifier/index.ts b/src/tools/css-prettifier/index.ts
new file mode 100644
index 00000000..a6103d78
--- /dev/null
+++ b/src/tools/css-prettifier/index.ts
@@ -0,0 +1,12 @@
+import { BrandCss3 } from '@vicons/tabler';
+import { defineTool } from '../tool';
+
+export const tool = defineTool({
+  name: 'Css prettifier',
+  path: '/css-prettifier',
+  description: 'CSS Prettify',
+  keywords: ['css', 'prettifier', 'beautify', 'prettier', 'format'],
+  component: () => import('./css-prettifier.vue'),
+  icon: BrandCss3,
+  createdAt: new Date('2024-03-15'),
+});
diff --git a/src/tools/index.ts b/src/tools/index.ts
index aa861c93..4a290995 100644
--- a/src/tools/index.ts
+++ b/src/tools/index.ts
@@ -6,6 +6,7 @@ import { tool as asciiTextDrawer } from './ascii-text-drawer';
 
 import { tool as textToUnicode } from './text-to-unicode';
 import { tool as safelinkDecoder } from './safelink-decoder';
+import { tool as cssPrettifier } from './css-prettifier';
 import { tool as pdfSignatureChecker } from './pdf-signature-checker';
 import { tool as numeronymGenerator } from './numeronym-generator';
 import { tool as macAddressGenerator } from './mac-address-generator';
@@ -148,6 +149,7 @@ export const toolsByCategory: ToolCategory[] = [
       dockerRunToDockerComposeConverter,
       xmlFormatter,
       yamlViewer,
+      cssPrettifier,
     ],
   },
   {