diff --git a/package.json b/package.json
index fa0781b..9121931 100644
--- a/package.json
+++ b/package.json
@@ -16,6 +16,16 @@
                 "default": "./dist/cjs/index.js"
             }
         },
+        "./utils": {
+            "import": {
+                "types": "./dist/esm/utils.d.mts",
+                "default": "./dist/esm/utils/index.mjs"
+            },
+            "require": {
+                "types": "./dist/cjs/utils.d.ts",
+                "default": "./dist/cjs/utils/index.js"
+            }
+        },
         "./package.json": "./package.json"
     },
     "files": [
diff --git a/src/nurl.ts b/src/nurl.ts
index 4d9ff5d..de40308 100644
--- a/src/nurl.ts
+++ b/src/nurl.ts
@@ -1,4 +1,5 @@
 import {decode, encode} from './punycode'
+import {mask, MaskOptions, match as matchUrlPattern} from './utils'
 import {
     extractPathKey,
     getDynamicPaths,
@@ -8,8 +9,7 @@ import {
     refineQueryWithPathname,
     convertQueryToArray,
     Query,
-    getPathPriority,
-} from './utils'
+} from './utils/internal'
 
 interface URLOptions
     extends Partial<
@@ -32,14 +32,6 @@ interface URLOptions
     basePath?: string
 }
 
-export interface MaskOptions {
-    patterns: string[]
-    sensitiveParams: string[]
-    maskChar?: string
-    maskLength?: number
-    preserveLength?: boolean
-}
-
 export default class NURL implements URL {
     private _href: string = ''
     private _protocol: string = ''
@@ -483,57 +475,10 @@ export default class NURL implements URL {
     }
 
     static match(url: string, pattern: string) {
-        if (!NURL.canParse(url) || !NURL.canParse(pattern)) {
-            return null
-        }
-
-        const urlSegments = url.split(/[?#]/)[0]?.split('/').filter(Boolean) || []
-        const patternSegments = pattern.split(/[?#]/)[0]?.split('/').filter(Boolean) || []
-
-        if (urlSegments.length !== patternSegments.length) {
-            return null
-        }
-
-        const params: Record<string, string> = {}
-
-        for (let i = 0; i < patternSegments.length; i++) {
-            const patternSegment = patternSegments[i]
-            const urlSegment = urlSegments[i]
-
-            if (isDynamicPath(patternSegment)) {
-                const pathKey = extractPathKey(patternSegment)
-                params[pathKey] = urlSegment
-            } else if (patternSegment !== urlSegment) {
-                return null
-            }
-        }
-
-        return params
+        return matchUrlPattern(url, pattern)
     }
 
-    static mask(
-        url: string,
-        {patterns, sensitiveParams, maskChar = '*', maskLength = 4, preserveLength = false}: MaskOptions,
-    ) {
-        const sortedPatterns = [...patterns].sort((a, b) => (getPathPriority(b) > getPathPriority(a) ? 1 : -1))
-        for (const pattern of sortedPatterns) {
-            const urlObj = NURL.create(url)
-            const matchedParams = NURL.match(urlObj.pathname, pattern)
-            if (!matchedParams) {
-                continue
-            }
-            sensitiveParams.forEach((sensitiveParam) => {
-                if (sensitiveParam in matchedParams) {
-                    const originalValue = matchedParams[sensitiveParam]
-                    const lengthToMask = preserveLength ? originalValue.length : maskLength
-                    matchedParams[sensitiveParam] = maskChar.repeat(lengthToMask)
-                }
-            })
-
-            urlObj.pathname = refinePathnameWithQuery(pattern, matchedParams)
-            return urlObj.toString()
-        }
-
-        return url
+    static mask(url: string, options: MaskOptions) {
+        return mask(url, options)
     }
 }
diff --git a/src/utils/external.ts b/src/utils/external.ts
new file mode 100644
index 0000000..1e0240f
--- /dev/null
+++ b/src/utils/external.ts
@@ -0,0 +1,65 @@
+import NURL from '../nurl'
+import {extractPathKey, getPathPriority, isDynamicPath, refinePathnameWithQuery} from './internal'
+
+export const match = (url: string, pattern: string): Record<string, string> | null => {
+    if (!NURL.canParse(url) || !NURL.canParse(pattern)) {
+        return null
+    }
+
+    const urlSegments = url.split(/[?#]/)[0]?.split('/').filter(Boolean) || []
+    const patternSegments = pattern.split(/[?#]/)[0]?.split('/').filter(Boolean) || []
+
+    if (urlSegments.length !== patternSegments.length) {
+        return null
+    }
+
+    const params: Record<string, string> = {}
+
+    for (let i = 0; i < patternSegments.length; i++) {
+        const patternSegment = patternSegments[i]
+        const urlSegment = urlSegments[i]
+
+        if (isDynamicPath(patternSegment)) {
+            const pathKey = extractPathKey(patternSegment)
+            params[pathKey] = urlSegment
+        } else if (patternSegment !== urlSegment) {
+            return null
+        }
+    }
+
+    return params
+}
+
+export interface MaskOptions {
+    patterns: string[]
+    sensitiveParams: string[]
+    maskChar?: string
+    maskLength?: number
+    preserveLength?: boolean
+}
+
+export const mask = (
+    url: string,
+    {patterns, sensitiveParams, maskChar = '*', maskLength = 4, preserveLength = false}: MaskOptions,
+) => {
+    const sortedPatterns = [...patterns].sort((a, b) => (getPathPriority(b) > getPathPriority(a) ? 1 : -1))
+    for (const pattern of sortedPatterns) {
+        const urlObj = NURL.create(url)
+        const matchedParams = match(urlObj.pathname, pattern)
+        if (!matchedParams) {
+            continue
+        }
+        sensitiveParams.forEach((sensitiveParam) => {
+            if (sensitiveParam in matchedParams) {
+                const originalValue = matchedParams[sensitiveParam]
+                const lengthToMask = preserveLength ? originalValue.length : maskLength
+                matchedParams[sensitiveParam] = maskChar.repeat(lengthToMask)
+            }
+        })
+
+        urlObj.pathname = refinePathnameWithQuery(pattern, matchedParams)
+        return urlObj.toString()
+    }
+
+    return url
+}
diff --git a/src/utils/index.ts b/src/utils/index.ts
new file mode 100644
index 0000000..eea7f38
--- /dev/null
+++ b/src/utils/index.ts
@@ -0,0 +1 @@
+export * from './external'
diff --git a/src/utils.ts b/src/utils/internal.ts
similarity index 100%
rename from src/utils.ts
rename to src/utils/internal.ts
diff --git a/vite.config.mts b/vite.config.mts
index f66a3da..2ebc1d1 100644
--- a/vite.config.mts
+++ b/vite.config.mts
@@ -9,6 +9,7 @@ export default createViteConfig({
     cwd: __dirname,
     entry: {
         index: './src/index.ts',
+        utils: './src/utils/index.ts',
     },
     outputs: [
         {format: 'es', dist: 'dist/esm'},