diff --git a/bun.lock b/bun.lock
index 3ca965a..2a60b78 100644
--- a/bun.lock
+++ b/bun.lock
@@ -4,7 +4,9 @@
     "": {
       "name": "wxocr",
       "dependencies": {
+        "@hono/zod-validator": "^0.7.1",
         "hono": "^4.8.4",
+        "zod": "^4.0.5",
       },
       "devDependencies": {
         "@antfu/eslint-config": "^4.16.2",
@@ -67,6 +69,8 @@
 
     "@eslint/plugin-kit": ["@eslint/plugin-kit@0.3.3", "", { "dependencies": { "@eslint/core": "^0.15.1", "levn": "^0.4.1" } }, "sha512-1+WqvgNMhmlAambTvT3KPtCl/Ibr68VldY2XY40SL1CE0ZXiakFR/cbTspaF5HsnpDMvcYYoJHfl4980NBjGag=="],
 
+    "@hono/zod-validator": ["@hono/zod-validator@0.7.1", "", { "peerDependencies": { "hono": ">=3.9.0", "zod": "^3.25.0 || ^4.0.0" } }, "sha512-8+vJT1RvezAx5sN7hiZ5Mis0RMuFL77nBEcqQQgT9ufoLkxr+7ll461WlBJQcGoQSY6EGMClVae19v3s/7bbgQ=="],
+
     "@humanfs/core": ["@humanfs/core@0.19.1", "", {}, "sha512-5DyQ4+1JEUzejeK1JGICcideyfUbGixgS9jNgex5nqkW+cY7WZhxBigmieN5Qnw9ZosSNVC9KQKyb+GUaGyKUA=="],
 
     "@humanfs/node": ["@humanfs/node@0.16.6", "", { "dependencies": { "@humanfs/core": "^0.19.1", "@humanwhocodes/retry": "^0.3.0" } }, "sha512-YuI2ZHQL78Q5HbhDiBA1X4LmYdXCKCMQIfw0pw7piHJwyREFebJUvrQN4cMssyES6x+vfUbx1CIpaQUKYdQZOw=="],
@@ -633,6 +637,8 @@
 
     "yocto-queue": ["yocto-queue@0.1.0", "", {}, "sha512-rVksvsnNCdJ/ohGc6xgPwyN8eheCxsiLM8mxuE/t/mOVqJewPuO1miLpTHQiRgTKCLexL4MeAFVagts7HmNZ2Q=="],
 
+    "zod": ["zod@4.0.5", "", {}, "sha512-/5UuuRPStvHXu7RS+gmvRf4NXrNxpSllGwDnCBcJZtQsKrviYXm54yDGV2KYNLT5kq0lHGcl7lqWJLgSaG+tgA=="],
+
     "zwitch": ["zwitch@2.0.4", "", {}, "sha512-bXE4cR/kVZhKZX/RjPEflHaKVhUVl85noU3v6b8apfQEc1x4A+zBxjZ4lN8LqGd6WZ3dl98pY4o717VFmoPp+A=="],
 
     "@eslint-community/eslint-utils/eslint-visitor-keys": ["eslint-visitor-keys@3.4.3", "", {}, "sha512-wpc+LXeiyiisxPlEkUzU6svyS1frIO3Mgxj1fdy7Pm8Ygzguax2N3Fa/D/ag1WqbOprdI+uY6wMUl8/a2G+iag=="],
diff --git a/package.json b/package.json
index dc4dcab..4c75ea8 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,9 @@
     "typescript": "^5.8.3"
   },
   "dependencies": {
-    "hono": "^4.8.4"
+    "@hono/zod-validator": "^0.7.1",
+    "hono": "^4.8.4",
+    "zod": "^4.0.5"
   },
   "devDependencies": {
     "@antfu/eslint-config": "^4.16.2",
diff --git a/src/index.ts b/src/index.ts
index 7170e3b..32577fb 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,28 +1,31 @@
+import { zValidator } from '@hono/zod-validator'
 import { Hono } from 'hono'
 import { Buffer } from 'node:buffer'
+import { z } from 'zod'
 
 import { WechatOCRClient } from './wcocr'
 
 const app = new Hono()
 const client = new WechatOCRClient()
 
-app.post('/ocr', async (c) => {
-  const formData = await c.req.formData()
-  const imageFile = formData.get('image')
+app.post(
+  '/ocr',
+  zValidator('form', z.object({
+    image: z.instanceof(File, { message: 'Image file is required' }),
+  })),
+  async (c) => {
+    const { image } = c.req.valid('form')
 
-  if (!imageFile || typeof imageFile === 'string') {
-    return c.json({ error: 'Image file is required' }, 400)
-  }
+    const imageBuffer = Buffer.from(await image.arrayBuffer())
 
-  const imageBuffer = Buffer.from(await imageFile.arrayBuffer())
-
-  try {
-    const result = await client.recognize(imageBuffer)
-    return c.json(JSON.parse(result))
-  } catch (error) {
-    console.error('OCR processing error:', error)
-    return c.json({ error: 'Failed to process image' }, 500)
-  }
-})
+    try {
+      const result = await client.recognize(imageBuffer)
+      return c.json(JSON.parse(result))
+    } catch (error) {
+      console.error('OCR processing error:', error)
+      return c.json({ error: 'Failed to process image' }, 500)
+    }
+  },
+)
 
 export default app