diff --git a/.gitignore b/.gitignore
index 92be508..21a650e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -21,6 +21,9 @@ __pycache__/
 # Distribution / packaging
 .Python
 build/
+# electron-builder resources (app icons) are source, not a Python build artifact — keep them tracked
+!electron/build/
+!electron/build/**
 develop-eggs/
 dist/
 downloads/
diff --git a/README.md b/README.md
index bb914d3..47ec86d 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,6 @@
-# onot
+<p align="center">
+  <img src="docs/images/logo.svg" alt="onot — OSS Notice Generator" width="300" />
+</p>
 
 [![CI](https://github.com/sktelecom/onot/actions/workflows/ci.yml/badge.svg)](https://github.com/sktelecom/onot/actions/workflows/ci.yml)
 [![Security](https://github.com/sktelecom/onot/actions/workflows/security.yml/badge.svg)](https://github.com/sktelecom/onot/actions/workflows/security.yml)
diff --git a/docs/images/logo-mark.svg b/docs/images/logo-mark.svg
new file mode 100644
index 0000000..f9bdf26
--- /dev/null
+++ b/docs/images/logo-mark.svg
@@ -0,0 +1,16 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48" role="img" aria-label="onot">
+  <defs>
+    <linearGradient id="onot-mark-grad" x1="0" y1="0" x2="1" y2="1">
+      <stop offset="0" stop-color="#4F46E5"/>
+      <stop offset="1" stop-color="#06B6D4"/>
+    </linearGradient>
+  </defs>
+  <rect width="48" height="48" rx="11" fill="url(#onot-mark-grad)"/>
+  <g transform="translate(12 12)" fill="none" stroke="#ffffff" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+    <path d="M14.5 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V7.5L14.5 2z"/>
+    <polyline points="14 2 14 8 20 8"/>
+    <line x1="16" y1="13" x2="8" y2="13"/>
+    <line x1="16" y1="17" x2="8" y2="17"/>
+    <line x1="10" y1="9" x2="8" y2="9"/>
+  </g>
+</svg>
diff --git a/docs/images/logo.svg b/docs/images/logo.svg
new file mode 100644
index 0000000..294f588
--- /dev/null
+++ b/docs/images/logo.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 226 48" width="226" height="48" role="img" aria-label="onot — OSS Notice Generator">
+  <defs>
+    <linearGradient id="onot-grad" x1="0" y1="0" x2="1" y2="1">
+      <stop offset="0" stop-color="#4F46E5"/>
+      <stop offset="1" stop-color="#06B6D4"/>
+    </linearGradient>
+  </defs>
+  <rect width="48" height="48" rx="11" fill="url(#onot-grad)"/>
+  <g transform="translate(12 12)" fill="none" stroke="#ffffff" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+    <path d="M14.5 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V7.5L14.5 2z"/>
+    <polyline points="14 2 14 8 20 8"/>
+    <line x1="16" y1="13" x2="8" y2="13"/>
+    <line x1="16" y1="17" x2="8" y2="17"/>
+    <line x1="10" y1="9" x2="8" y2="9"/>
+  </g>
+  <text x="62" y="28" font-family="Inter, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif" font-size="24" font-weight="700" fill="url(#onot-grad)">onot</text>
+  <text x="63" y="40.5" font-family="Inter, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif" font-size="9" font-weight="600" letter-spacing="2" fill="#6b7280">OSS NOTICE GENERATOR</text>
+</svg>
diff --git a/electron/assets/logo.svg b/electron/assets/logo.svg
new file mode 100644
index 0000000..f9bdf26
--- /dev/null
+++ b/electron/assets/logo.svg
@@ -0,0 +1,16 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48" role="img" aria-label="onot">
+  <defs>
+    <linearGradient id="onot-mark-grad" x1="0" y1="0" x2="1" y2="1">
+      <stop offset="0" stop-color="#4F46E5"/>
+      <stop offset="1" stop-color="#06B6D4"/>
+    </linearGradient>
+  </defs>
+  <rect width="48" height="48" rx="11" fill="url(#onot-mark-grad)"/>
+  <g transform="translate(12 12)" fill="none" stroke="#ffffff" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+    <path d="M14.5 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V7.5L14.5 2z"/>
+    <polyline points="14 2 14 8 20 8"/>
+    <line x1="16" y1="13" x2="8" y2="13"/>
+    <line x1="16" y1="17" x2="8" y2="17"/>
+    <line x1="10" y1="9" x2="8" y2="9"/>
+  </g>
+</svg>
diff --git a/electron/build/icon.icns b/electron/build/icon.icns
new file mode 100644
index 0000000..aaa7c02
Binary files /dev/null and b/electron/build/icon.icns differ
diff --git a/electron/build/icon.ico b/electron/build/icon.ico
new file mode 100644
index 0000000..5e795c1
Binary files /dev/null and b/electron/build/icon.ico differ
diff --git a/electron/build/icon.png b/electron/build/icon.png
new file mode 100644
index 0000000..66da2f7
Binary files /dev/null and b/electron/build/icon.png differ
diff --git a/frontend/index.html b/frontend/index.html
index 8304c31..2d9dca1 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -3,6 +3,7 @@
   <head>
     <meta charset="UTF-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <link rel="icon" type="image/svg+xml" href="/favicon.svg" />
     <title>onot — OSS Notice Generator</title>
   </head>
   <body>
diff --git a/frontend/public/favicon.svg b/frontend/public/favicon.svg
new file mode 100644
index 0000000..f9bdf26
--- /dev/null
+++ b/frontend/public/favicon.svg
@@ -0,0 +1,16 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48" role="img" aria-label="onot">
+  <defs>
+    <linearGradient id="onot-mark-grad" x1="0" y1="0" x2="1" y2="1">
+      <stop offset="0" stop-color="#4F46E5"/>
+      <stop offset="1" stop-color="#06B6D4"/>
+    </linearGradient>
+  </defs>
+  <rect width="48" height="48" rx="11" fill="url(#onot-mark-grad)"/>
+  <g transform="translate(12 12)" fill="none" stroke="#ffffff" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+    <path d="M14.5 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V7.5L14.5 2z"/>
+    <polyline points="14 2 14 8 20 8"/>
+    <line x1="16" y1="13" x2="8" y2="13"/>
+    <line x1="16" y1="17" x2="8" y2="17"/>
+    <line x1="10" y1="9" x2="8" y2="9"/>
+  </g>
+</svg>
diff --git a/frontend/public/logo-mark.svg b/frontend/public/logo-mark.svg
new file mode 100644
index 0000000..f9bdf26
--- /dev/null
+++ b/frontend/public/logo-mark.svg
@@ -0,0 +1,16 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="48" height="48" role="img" aria-label="onot">
+  <defs>
+    <linearGradient id="onot-mark-grad" x1="0" y1="0" x2="1" y2="1">
+      <stop offset="0" stop-color="#4F46E5"/>
+      <stop offset="1" stop-color="#06B6D4"/>
+    </linearGradient>
+  </defs>
+  <rect width="48" height="48" rx="11" fill="url(#onot-mark-grad)"/>
+  <g transform="translate(12 12)" fill="none" stroke="#ffffff" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+    <path d="M14.5 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V7.5L14.5 2z"/>
+    <polyline points="14 2 14 8 20 8"/>
+    <line x1="16" y1="13" x2="8" y2="13"/>
+    <line x1="16" y1="17" x2="8" y2="17"/>
+    <line x1="10" y1="9" x2="8" y2="9"/>
+  </g>
+</svg>
diff --git a/frontend/public/logo.svg b/frontend/public/logo.svg
new file mode 100644
index 0000000..294f588
--- /dev/null
+++ b/frontend/public/logo.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 226 48" width="226" height="48" role="img" aria-label="onot — OSS Notice Generator">
+  <defs>
+    <linearGradient id="onot-grad" x1="0" y1="0" x2="1" y2="1">
+      <stop offset="0" stop-color="#4F46E5"/>
+      <stop offset="1" stop-color="#06B6D4"/>
+    </linearGradient>
+  </defs>
+  <rect width="48" height="48" rx="11" fill="url(#onot-grad)"/>
+  <g transform="translate(12 12)" fill="none" stroke="#ffffff" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+    <path d="M14.5 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V7.5L14.5 2z"/>
+    <polyline points="14 2 14 8 20 8"/>
+    <line x1="16" y1="13" x2="8" y2="13"/>
+    <line x1="16" y1="17" x2="8" y2="17"/>
+    <line x1="10" y1="9" x2="8" y2="9"/>
+  </g>
+  <text x="62" y="28" font-family="Inter, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif" font-size="24" font-weight="700" fill="url(#onot-grad)">onot</text>
+  <text x="63" y="40.5" font-family="Inter, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif" font-size="9" font-weight="600" letter-spacing="2" fill="#6b7280">OSS NOTICE GENERATOR</text>
+</svg>
diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index e3f55e2..ed8b072 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -111,9 +111,12 @@ export default function App() {
 
   return (
     <div className="mx-auto max-w-6xl p-6">
-      <header className="mb-6">
-        <h1 className="text-2xl font-bold">{t(uiLang, "title")}</h1>
-        <p className="text-sm text-zinc-400">{t(uiLang, "subtitle")}</p>
+      <header className="mb-6 flex items-center gap-3">
+        <img src="/logo-mark.svg" alt="onot" width={44} height={44} className="shrink-0" />
+        <div>
+          <h1 className="text-2xl font-bold">{t(uiLang, "title")}</h1>
+          <p className="text-sm text-zinc-400">{t(uiLang, "subtitle")}</p>
+        </div>
       </header>
 
       <main>