diff --git a/.eslintrc.json b/.eslintrc.json
deleted file mode 100644
index 2884730..0000000
--- a/.eslintrc.json
+++ /dev/null
@@ -1,8 +0,0 @@
-{
-  "extends": ["next/core-web-vitals", "next/typescript"],
-  "rules": {
-    "@typescript-eslint/no-explicit-any": "off",
-    "@next/next/no-img-element": "off",
-    "react-hooks/exhaustive-deps": "off"
-  }
-}
diff --git a/.github/workflows/auto-fix-lint-format-commit.yml b/.github/workflows/auto-fix-lint-format-commit.yml
index 46c0150..3de375b 100644
--- a/.github/workflows/auto-fix-lint-format-commit.yml
+++ b/.github/workflows/auto-fix-lint-format-commit.yml
@@ -23,11 +23,8 @@ jobs:
       - name: Install dependencies
         run: bun install
 
-      - name: Run linter and fix issues
-        run: bun run lint:fix
-
-      - name: Run formatter
-        run: bun run format
+      - name: Run linter & formatter and fix issues
+        run: bun run check:fix
 
       - name: Check for changes
         id: check_changes
diff --git a/.prettierrc.json b/.prettierrc.json
deleted file mode 100644
index 55490b2..0000000
--- a/.prettierrc.json
+++ /dev/null
@@ -1,12 +0,0 @@
-{
-  "semi": false,
-  "singleQuote": false,
-  "printWidth": 100,
-  "tabWidth": 2,
-  "trailingComma": "all",
-  "importOrder": ["^@core/(.*)$", "^@server/(.*)$", "^@ui/(.*)$", "^[./]"],
-  "importOrderSeparation": true,
-  "importOrderSortSpecifiers": true,
-  "endOfLine": "auto",
-  "plugins": ["prettier-plugin-tailwindcss", "@trivago/prettier-plugin-sort-imports"]
-}
diff --git a/app/api/server-ip/route.ts b/app/api/server-ip/route.ts
index 3b12b45..90fdb0a 100644
--- a/app/api/server-ip/route.ts
+++ b/app/api/server-ip/route.ts
@@ -1,11 +1,11 @@
+import fs from "fs"
+import path from "path"
 import { auth } from "@/auth"
 import getEnv from "@/lib/env-entry"
 import { GetServerIP } from "@/lib/serverFetch"
-import fs from "fs"
 import { AsnResponse, CityResponse, Reader } from "maxmind"
 import { redirect } from "next/navigation"
 import { NextRequest, NextResponse } from "next/server"
-import path from "path"
 
 export const dynamic = "force-dynamic"
 
diff --git a/biome.json b/biome.json
new file mode 100644
index 0000000..3b714d1
--- /dev/null
+++ b/biome.json
@@ -0,0 +1,85 @@
+{
+  "$schema": "https://biomejs.dev/schemas/1.9.4/schema.json",
+  "vcs": { "enabled": false, "clientKind": "git", "useIgnoreFile": false },
+  "files": { "ignoreUnknown": false, "ignore": [".next", "public"] },
+  "formatter": {
+    "enabled": true,
+    "useEditorconfig": true,
+    "formatWithErrors": false,
+    "indentStyle": "space",
+    "indentWidth": 2,
+    "lineWidth": 100,
+    "attributePosition": "auto",
+    "bracketSpacing": true
+  },
+  "organizeImports": { "enabled": true },
+  "linter": {
+    "enabled": true,
+    "rules": {
+      "recommended": false,
+      "complexity": { "noUselessTypeConstraint": "error" },
+      "correctness": {
+        "noUnusedVariables": "error",
+        "useArrayLiterals": "off",
+        "useExhaustiveDependencies": "off"
+      },
+      "style": { "noNamespace": "error", "useAsConstAssertion": "error" },
+      "suspicious": {
+        "noExplicitAny": "off",
+        "noExtraNonNullAssertion": "error",
+        "noMisleadingInstantiator": "error",
+        "noUnsafeDeclarationMerging": "error",
+        "useNamespaceKeyword": "error"
+      }
+    }
+  },
+  "javascript": {
+    "formatter": {
+      "jsxQuoteStyle": "double",
+      "quoteProperties": "asNeeded",
+      "trailingCommas": "all",
+      "semicolons": "asNeeded",
+      "arrowParentheses": "always",
+      "bracketSameLine": false,
+      "quoteStyle": "double",
+      "attributePosition": "auto",
+      "bracketSpacing": true
+    }
+  },
+  "overrides": [
+    {
+      "include": ["*.ts", "*.tsx", "*.mts", "*.cts"],
+      "linter": {
+        "rules": {
+          "correctness": {
+            "noConstAssign": "off",
+            "noGlobalObjectCalls": "off",
+            "noInvalidBuiltinInstantiation": "off",
+            "noInvalidConstructorSuper": "off",
+            "noNewSymbol": "off",
+            "noSetterReturn": "off",
+            "noUndeclaredVariables": "off",
+            "noUnreachable": "off",
+            "noUnreachableSuper": "off"
+          },
+          "style": {
+            "noArguments": "error",
+            "noVar": "error",
+            "useConst": "error"
+          },
+          "suspicious": {
+            "noClassAssign": "off",
+            "noDuplicateClassMembers": "off",
+            "noDuplicateObjectKeys": "off",
+            "noDuplicateParameters": "off",
+            "noFunctionAssign": "off",
+            "noImportAssign": "off",
+            "noRedeclare": "off",
+            "noUnsafeNegation": "off",
+            "useGetterReturn": "off"
+          }
+        }
+      }
+    }
+  ]
+}
diff --git a/bun.lockb b/bun.lockb
index 4d33e23..3c94f28 100755
Binary files a/bun.lockb and b/bun.lockb differ
diff --git a/bunfig.toml b/bunfig.toml
deleted file mode 100644
index 6517a5c..0000000
--- a/bunfig.toml
+++ /dev/null
@@ -1,2 +0,0 @@
-[install]
-registry = "https://registry.npmmirror.com/"
diff --git a/i18n-metadata.ts b/i18n-metadata.ts
index 1c3c804..16a1daf 100644
--- a/i18n-metadata.ts
+++ b/i18n-metadata.ts
@@ -6,19 +6,6 @@ export const localeItems = [
   { code: "ja", name: "日本語" },
   { code: "zh-t", name: "中文繁體" },
   { code: "zh", name: "中文简体" },
-  //{code: 'ar', name: 'العربية'},
-  //{code: 'de', name: 'Deutsch'},
-  //{code: 'es', name: 'Español'},
-  //{code: 'fr', name: 'Français'},
-  //{code: 'hi', name: 'हिन्दी'},
-  //{code: 'id', name: 'Bahasa Indonesia'},
-  //{code: 'it', name: 'Italiano'},
-  //{code: 'ko', name: '한국어'},
-  //{code: 'ms', name: 'Bahasa Melayu'},
-  //{code: 'pt', name: 'Português'},
-  //{code: 'ru', name: 'Русский'},
-  //{code: 'th', name: 'ไทย'},
-  //{code: 'vi', name: 'Tiếng Việt'},
 ]
 
 export const locales = localeItems.map((item) => item.code)
diff --git a/package.json b/package.json
index d27823e..b9e2c28 100644
--- a/package.json
+++ b/package.json
@@ -5,9 +5,11 @@
   "scripts": {
     "dev": "next dev -p 3040",
     "start": "node .next/standalone/server.js",
-    "lint": "next lint",
-    "lint:fix": "next lint --fix",
-    "format": "prettier --write .",
+    "lint": "biome lint",
+    "lint:fix": "biome lint --fix",
+    "format": "biome format --write .",
+    "check": "biome check",
+    "check:fix": "biome check --fix",
     "build": "next build && cp -r .next/static .next/standalone/.next/ && cp -r public .next/standalone/",
     "build-dev": "next build",
     "start-dev": "next start"
@@ -60,6 +62,7 @@
     "typescript-eslint": "^8.18.2"
   },
   "devDependencies": {
+    "@biomejs/biome": "1.9.4",
     "@next/bundle-analyzer": "^15.1.2",
     "@tailwindcss/postcss": "^4.0.0-beta.8",
     "@types/node": "^22.10.2",