diff --git a/package.json b/package.json
index 019aa26..9b221bc 100644
--- a/package.json
+++ b/package.json
@@ -19,9 +19,11 @@
     "clsx": "^2.1.1",
     "lucide-react": "^0.548.0",
     "nanoid": "^5.1.6",
+    "next-themes": "^0.4.6",
     "react": "^19.1.1",
     "react-dom": "^19.1.1",
     "react-router-dom": "^7.9.4",
+    "sonner": "^2.0.7",
     "tailwind-merge": "^3.3.1",
     "tailwindcss": "^4.1.16",
     "uuid": "^13.0.0"
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index bca26d2..b195b49 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -38,6 +38,9 @@ importers:
       nanoid:
         specifier: ^5.1.6
         version: 5.1.6
+      next-themes:
+        specifier: ^0.4.6
+        version: 0.4.6(react-dom@19.2.0(react@19.2.0))(react@19.2.0)
       react:
         specifier: ^19.1.1
         version: 19.2.0
@@ -47,6 +50,9 @@ importers:
       react-router-dom:
         specifier: ^7.9.4
         version: 7.9.4(react-dom@19.2.0(react@19.2.0))(react@19.2.0)
+      sonner:
+        specifier: ^2.0.7
+        version: 2.0.7(react-dom@19.2.0(react@19.2.0))(react@19.2.0)
       tailwind-merge:
         specifier: ^3.3.1
         version: 3.3.1
@@ -1280,6 +1286,12 @@ packages:
   natural-compare@1.4.0:
     resolution: {integrity: sha512-OWND8ei3VtNC9h7V60qff3SVobHr996CTwgxubgyQYEpg290h9J0buyECNNJexkFm5sOajh5G116RYA1c8ZMSw==}
 
+  next-themes@0.4.6:
+    resolution: {integrity: sha512-pZvgD5L0IEvX5/9GWyHMf3m8BKiVQwsCMHfoFosXtXBMnaS0ZnIJ9ST4b4NqLVKDEm8QBxoNNGNaBv2JNF6XNA==}
+    peerDependencies:
+      react: ^16.8 || ^17 || ^18 || ^19 || ^19.0.0-rc
+      react-dom: ^16.8 || ^17 || ^18 || ^19 || ^19.0.0-rc
+
   node-releases@2.0.26:
     resolution: {integrity: sha512-S2M9YimhSjBSvYnlr5/+umAnPHE++ODwt5e2Ij6FoX45HA/s4vHdkDx1eax2pAPeAOqu4s9b7ppahsyEFdVqQA==}
 
@@ -1472,6 +1484,12 @@ packages:
     resolution: {integrity: sha512-7++dFhtcx3353uBaq8DDR4NuxBetBzC7ZQOhmTQInHEd6bSrXdiEyzCvG07Z44UYdLShWUyXt5M/yhz8ekcb1A==}
     engines: {node: '>=8'}
 
+  sonner@2.0.7:
+    resolution: {integrity: sha512-W6ZN4p58k8aDKA4XPcx2hpIQXBRAgyiWVkYhT7CvK6D3iAu7xjvVyhQHg2/iaKJZ1XVJ4r7XuwGL+WGEK37i9w==}
+    peerDependencies:
+      react: ^18.0.0 || ^19.0.0 || ^19.0.0-rc
+      react-dom: ^18.0.0 || ^19.0.0 || ^19.0.0-rc
+
   source-map-js@1.2.1:
     resolution: {integrity: sha512-UXWMKhLOwVKb728IUtQPXxfYU+usdybtUrK/8uGE8CQMvrhOpwvzDBwj0QhSL7MQc7vIsISBG8VQ8+IDQxpfQA==}
     engines: {node: '>=0.10.0'}
@@ -2702,6 +2720,11 @@ snapshots:
 
   natural-compare@1.4.0: {}
 
+  next-themes@0.4.6(react-dom@19.2.0(react@19.2.0))(react@19.2.0):
+    dependencies:
+      react: 19.2.0
+      react-dom: 19.2.0(react@19.2.0)
+
   node-releases@2.0.26: {}
 
   optionator@0.9.4:
@@ -2854,6 +2877,11 @@ snapshots:
 
   shebang-regex@3.0.0: {}
 
+  sonner@2.0.7(react-dom@19.2.0(react@19.2.0))(react@19.2.0):
+    dependencies:
+      react: 19.2.0
+      react-dom: 19.2.0(react@19.2.0)
+
   source-map-js@1.2.1: {}
 
   strip-json-comments@3.1.1: {}
diff --git a/src/components/tool/index.tsx b/src/components/tool/index.tsx
index 64aa641..44e56ac 100644
--- a/src/components/tool/index.tsx
+++ b/src/components/tool/index.tsx
@@ -1,7 +1,8 @@
 import type { ReactNode } from 'react';
-import { Hash } from 'lucide-react'
+import { FileJson, Hash } from 'lucide-react'
 
 import UUID from './uuid'
+import JSON from './json'
 
 export interface Tool {
   path: string;
@@ -18,5 +19,12 @@ export const tools: Tool[] = [
     description: "Generate a UUID",
     icon: <Hash />,
     component: <UUID />,
+  },
+  {
+    path: "json",
+    name: "JSON Formatter",
+    description: "Format and validate JSON",
+    icon: <FileJson />,
+    component: <JSON />,
   }
 ];
\ No newline at end of file
diff --git a/src/components/tool/json.tsx b/src/components/tool/json.tsx
new file mode 100644
index 0000000..d7760a5
--- /dev/null
+++ b/src/components/tool/json.tsx
@@ -0,0 +1,49 @@
+import { useState, type FC } from "react";
+import { Textarea } from "@/components/ui/textarea";
+import { Button } from "@/components/ui/button";
+import { Alert, AlertDescription, AlertTitle } from "@/components/ui/alert";
+import { toast } from "sonner";
+
+const Tool: FC = () => {
+  const [json, setJson] = useState<string>("");
+
+  const validateJson = () => {
+    try {
+      JSON.parse(json);
+      return true;
+    } catch (error: unknown) {
+      if (error instanceof Error) {
+        toast.error(error.message);
+      } else {
+        toast.error("Invalid JSON");
+      }
+      return false;
+    }
+  };
+
+  const minifyJson = () => {
+    if (!validateJson()) return;
+    const formattedJson = JSON.stringify(JSON.parse(json), null, 0);
+    setJson(formattedJson);
+    toast.success("Minified successfully");
+  };
+
+  const prettifyJson = () => {
+    if (!validateJson()) return;
+    const formattedJson = JSON.stringify(JSON.parse(json), null, 2);
+    setJson(formattedJson);
+    toast.success("JSON prettified successfully");
+  };
+
+  return (
+    <div className="h-full flex flex-col gap-4">
+      <Textarea className="flex-1 w-full resize-none" placeholder="Enter your JSON here" value={json} onChange={(e) => setJson(e.target.value)} />
+      <div className="flex flex-row gap-2">
+        <Button onClick={minifyJson}>Minify</Button>
+        <Button onClick={prettifyJson}>Pretty</Button>
+      </div>
+    </div>
+  );
+};
+
+export default Tool;
diff --git a/src/components/ui/alert.tsx b/src/components/ui/alert.tsx
new file mode 100644
index 0000000..1421354
--- /dev/null
+++ b/src/components/ui/alert.tsx
@@ -0,0 +1,66 @@
+import * as React from "react"
+import { cva, type VariantProps } from "class-variance-authority"
+
+import { cn } from "@/lib/utils"
+
+const alertVariants = cva(
+  "relative w-full rounded-lg border px-4 py-3 text-sm grid has-[>svg]:grid-cols-[calc(var(--spacing)*4)_1fr] grid-cols-[0_1fr] has-[>svg]:gap-x-3 gap-y-0.5 items-start [&>svg]:size-4 [&>svg]:translate-y-0.5 [&>svg]:text-current",
+  {
+    variants: {
+      variant: {
+        default: "bg-card text-card-foreground",
+        destructive:
+          "text-destructive bg-card [&>svg]:text-current *:data-[slot=alert-description]:text-destructive/90",
+      },
+    },
+    defaultVariants: {
+      variant: "default",
+    },
+  }
+)
+
+function Alert({
+  className,
+  variant,
+  ...props
+}: React.ComponentProps<"div"> & VariantProps<typeof alertVariants>) {
+  return (
+    <div
+      data-slot="alert"
+      role="alert"
+      className={cn(alertVariants({ variant }), className)}
+      {...props}
+    />
+  )
+}
+
+function AlertTitle({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="alert-title"
+      className={cn(
+        "col-start-2 line-clamp-1 min-h-4 font-medium tracking-tight",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function AlertDescription({
+  className,
+  ...props
+}: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="alert-description"
+      className={cn(
+        "text-muted-foreground col-start-2 grid justify-items-start gap-1 text-sm [&_p]:leading-relaxed",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+export { Alert, AlertTitle, AlertDescription }
diff --git a/src/components/ui/sonner.tsx b/src/components/ui/sonner.tsx
new file mode 100644
index 0000000..9f46e06
--- /dev/null
+++ b/src/components/ui/sonner.tsx
@@ -0,0 +1,38 @@
+import {
+  CircleCheckIcon,
+  InfoIcon,
+  Loader2Icon,
+  OctagonXIcon,
+  TriangleAlertIcon,
+} from "lucide-react"
+import { useTheme } from "next-themes"
+import { Toaster as Sonner, type ToasterProps } from "sonner"
+
+const Toaster = ({ ...props }: ToasterProps) => {
+  const { theme = "system" } = useTheme()
+
+  return (
+    <Sonner
+      theme={theme as ToasterProps["theme"]}
+      className="toaster group"
+      icons={{
+        success: <CircleCheckIcon className="size-4" />,
+        info: <InfoIcon className="size-4" />,
+        warning: <TriangleAlertIcon className="size-4" />,
+        error: <OctagonXIcon className="size-4" />,
+        loading: <Loader2Icon className="size-4 animate-spin" />,
+      }}
+      style={
+        {
+          "--normal-bg": "var(--popover)",
+          "--normal-text": "var(--popover-foreground)",
+          "--normal-border": "var(--border)",
+          "--border-radius": "var(--radius)",
+        } as React.CSSProperties
+      }
+      {...props}
+    />
+  )
+}
+
+export { Toaster }
diff --git a/src/components/ui/textarea.tsx b/src/components/ui/textarea.tsx
new file mode 100644
index 0000000..7f21b5e
--- /dev/null
+++ b/src/components/ui/textarea.tsx
@@ -0,0 +1,18 @@
+import * as React from "react"
+
+import { cn } from "@/lib/utils"
+
+function Textarea({ className, ...props }: React.ComponentProps<"textarea">) {
+  return (
+    <textarea
+      data-slot="textarea"
+      className={cn(
+        "border-input placeholder:text-muted-foreground focus-visible:border-ring focus-visible:ring-ring/50 aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive dark:bg-input/30 flex field-sizing-content min-h-16 w-full rounded-md border bg-transparent px-3 py-2 text-base shadow-xs transition-[color,box-shadow] outline-none focus-visible:ring-[3px] disabled:cursor-not-allowed disabled:opacity-50 md:text-sm",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+export { Textarea }
diff --git a/src/main.tsx b/src/main.tsx
index 72ea416..b5a9d99 100644
--- a/src/main.tsx
+++ b/src/main.tsx
@@ -1,10 +1,14 @@
 import { StrictMode } from 'react'
 import { createRoot } from 'react-dom/client'
+
+import { Toaster } from '@/components/ui/sonner'
+
 import './index.css'
 import { AppRouter } from './router'
 
 createRoot(document.getElementById('root')!).render(
   <StrictMode>
     <AppRouter />
+    <Toaster />
   </StrictMode>
 )