diff --git a/.eslintignore b/.eslintignore
index b66e7fdb..5a697bdc 100644
--- a/.eslintignore
+++ b/.eslintignore
@@ -8,6 +8,5 @@ node_modules
 /test/CMakeFiles
 /packages/runtime/lib
 /packages/emnapi/lib
-/packages/emnapi/transformer/out
 /packages/core/src/index.js
 /out
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 81bec9d7..23ec87fb 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -22,7 +22,7 @@ This doc will explain the structure of this project and some points need to note
 - `packages/core` (`dependencies`)
 
     This package is designed for using emnapi on non-Emscripten platform, it is a trasformed output of `packages/emnapi`
-    by using `packages/emnapi/transformer`.
+    by using `packages/ts-transform-emscripten-parse-tools`.
     
     For common WebAssembly loading case, we can't use the Emscripten JavaScript library file built in `packages/emnapi` package.
     We need to manually provide imported symbols to the second parameter of `WebAssembly.instantiate`,
@@ -52,4 +52,4 @@ This doc will explain the structure of this project and some points need to note
 Macro is heavily used in `packages/emnapi`, there are two kinds of macro.
 
 - `$macroName(...)`: transformed to `{{{ macroName(...) }}}`
-- `$CUSTOM_MACRO!(...)`: powered by `packages/emnapi/transformer/src/macro.ts`
+- `$CUSTOM_MACRO!(...)`: powered by `packages/ts-transform-macro`
diff --git a/package.json b/package.json
index 94554835..67e88ec3 100644
--- a/package.json
+++ b/package.json
@@ -48,10 +48,13 @@
     "eslint-plugin-promise": "^6.1.1",
     "fs-extra": "^10.1.0",
     "rollup": "^4.5.2",
-    "ts-clone-node": "^3.0.0",
     "typescript": "~5.0.4"
   },
   "workspaces": [
+    "packages/ts-transform-macro",
+    "packages/ts-transform-emscripten-parse-tools",
+    "packages/ts-transform-emscripten-esm-library",
+    "packages/rollup-plugin-emscripten-esm-library",
     "packages/runtime",
     "packages/node",
     "packages/emnapi",
diff --git a/packages/emnapi/.npmignore b/packages/emnapi/.npmignore
index 56c81700..7807f435 100644
--- a/packages/emnapi/.npmignore
+++ b/packages/emnapi/.npmignore
@@ -3,4 +3,3 @@ tsconfig*
 /src/**/*.ts
 /build
 /dist/emnapi-core.js
-/transformer
diff --git a/packages/emnapi/script/build.js b/packages/emnapi/script/build.js
index ae55ec73..a115456a 100644
--- a/packages/emnapi/script/build.js
+++ b/packages/emnapi/script/build.js
@@ -2,7 +2,6 @@ const fs = require('fs')
 const path = require('path')
 const { createRequire } = require('module')
 const ts = require('typescript')
-const { compile } = require('@tybys/tsapi')
 const rollupTypescript = require('@rollup/plugin-typescript').default
 const rollupAlias = require('@rollup/plugin-alias').default
 const { rollup } = require('rollup')
@@ -12,9 +11,6 @@ const { rollup } = require('rollup')
 // } = require('../../runtime/script/build.js')
 
 async function build () {
-  const transformerTsconfigPath = path.join(__dirname, '../transformer/tsconfig.json')
-  compile(transformerTsconfigPath)
-
   const libTsconfigPath = path.join(__dirname, '../tsconfig.json')
   // compile(libTsconfigPath)
   const libTsconfig = JSON.parse(fs.readFileSync(libTsconfigPath, 'utf8'))
@@ -40,7 +36,7 @@ async function build () {
           before: [
             {
               type: 'program',
-              factory: require('../transformer/out/macro.js').default
+              factory: require('@emnapi/ts-transform-macro').createTransformerFactory
             },
             {
               type: 'program',
@@ -65,7 +61,7 @@ async function build () {
           { find: 'emnapi:shared', replacement: path.join(__dirname, '../src/emscripten/init.ts') }
         ]
       }),
-      require('./rollup-plugin-emscripten.js').default({
+      require('@emnapi/rollup-plugin-emscripten-esm-library').default({
         defaultLibraryFuncsToInclude: ['$emnapiInit'],
         exportedRuntimeMethods: ['emnapiInit'],
         modifyOutput (output) {
@@ -114,12 +110,12 @@ async function build () {
           before: [
             {
               type: 'program',
-              factory: require('../transformer/out/macro.js').default
+              factory: require('@emnapi/ts-transform-macro').createTransformerFactory
             },
             {
               type: 'program',
               factory (program) {
-                return require('../transformer/out/index.js').default(program, {
+                return require('@emnapi/ts-transform-emscripten-parse-tools').createTransformerFactory(program, {
                   defines: {
                     MEMORY64: 0
                   }
diff --git a/packages/emnapi/transformer/tsconfig.json b/packages/emnapi/transformer/tsconfig.json
deleted file mode 100644
index 6b20b6e6..00000000
--- a/packages/emnapi/transformer/tsconfig.json
+++ /dev/null
@@ -1,24 +0,0 @@
-{
-  "compilerOptions": {
-    "target": "ES2019",
-    "module": "CommonJS",
-    "moduleResolution": "node",
-    "strict": true,
-    "noImplicitAny": true,
-    "noImplicitReturns": true,
-    "noImplicitThis": true,
-    "noUnusedLocals": true,
-    "noUnusedParameters": true,
-    "strictNullChecks": true,
-    "strictPropertyInitialization": true,
-    "strictBindCallApply": true,
-    "strictFunctionTypes": true,
-    "declaration": true,
-    "sourceMap": true,
-    "outDir": "out"
-  },
-  "include": [
-    "./src/**/*.ts",
-    "../../runtime/src/typings/*.d.ts"
-  ]
-}
diff --git a/packages/rollup-plugin-emscripten-esm-library/.gitignore b/packages/rollup-plugin-emscripten-esm-library/.gitignore
new file mode 100644
index 00000000..502167fa
--- /dev/null
+++ b/packages/rollup-plugin-emscripten-esm-library/.gitignore
@@ -0,0 +1 @@
+/lib
diff --git a/packages/rollup-plugin-emscripten-esm-library/.npmignore b/packages/rollup-plugin-emscripten-esm-library/.npmignore
new file mode 100644
index 00000000..a6f4a228
--- /dev/null
+++ b/packages/rollup-plugin-emscripten-esm-library/.npmignore
@@ -0,0 +1,7 @@
+.vscode
+node_modules
+/src
+.gitignore
+.npmignore
+tsconfig.json
+*.map
diff --git a/packages/rollup-plugin-emscripten-esm-library/README.md b/packages/rollup-plugin-emscripten-esm-library/README.md
new file mode 100644
index 00000000..f71ab926
--- /dev/null
+++ b/packages/rollup-plugin-emscripten-esm-library/README.md
@@ -0,0 +1 @@
+# @emnapi/rollup-plugin-emscripten-esm-library
diff --git a/packages/rollup-plugin-emscripten-esm-library/package.json b/packages/rollup-plugin-emscripten-esm-library/package.json
new file mode 100644
index 00000000..baf54243
--- /dev/null
+++ b/packages/rollup-plugin-emscripten-esm-library/package.json
@@ -0,0 +1,30 @@
+{
+  "name": "@emnapi/rollup-plugin-emscripten-esm-library",
+  "version": "1.0.0",
+  "description": "Using ESM to write Emscripten JavaScript library",
+  "type": "commonjs",
+  "main": "./lib/index.js",
+  "types": "./lib/index.d.ts",
+  "scripts": {
+    "build": "tsc"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/toyobayashi/emnapi.git"
+  },
+  "author": "toyobayashi",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/toyobayashi/emnapi/issues"
+  },
+  "homepage": "https://github.com/toyobayashi/emnapi/tree/main/packages/rollup-plugin-emscripten-esm-library#readme",
+  "publishConfig": {
+    "access": "public"
+  },
+  "peerDependencies": {
+    "rollup": ">= 2.0.0"
+  },
+  "dependencies": {
+    "@emnapi/ts-transform-emscripten-esm-library": "^1.0.0"
+  }
+}
diff --git a/packages/emnapi/script/rollup-plugin-emscripten.js b/packages/rollup-plugin-emscripten-esm-library/src/index.ts
similarity index 65%
rename from packages/emnapi/script/rollup-plugin-emscripten.js
rename to packages/rollup-plugin-emscripten-esm-library/src/index.ts
index f3e9c7c1..001d39f8 100644
--- a/packages/emnapi/script/rollup-plugin-emscripten.js
+++ b/packages/rollup-plugin-emscripten-esm-library/src/index.ts
@@ -1,13 +1,15 @@
-const { EOL } = require('os')
-const ts = require('typescript')
-const createTransformer = require('../transformer/out/esm.js').default
-
-/**
- * @param {string} fileName
- * @param {string} sourceText
- * @returns {string}
- */
-function transform (fileName, sourceText) {
+import { EOL } from 'os'
+import ts = require('typescript')
+import type { Plugin } from 'rollup'
+import { createTransformerFactory } from '@emnapi/ts-transform-emscripten-esm-library'
+
+export interface PluginOptions {
+  defaultLibraryFuncsToInclude?: string[]
+  exportedRuntimeMethods?: string[]
+  modifyOutput?: (output: string) => string
+}
+
+function transform (fileName: string, sourceText: string): string {
   const compilerOptions = {
     allowJs: true,
     module: ts.ModuleKind.ESNext,
@@ -23,7 +25,7 @@ function transform (fileName, sourceText) {
     host
   })
 
-  const transformerFactory = createTransformer(program)
+  const transformerFactory = createTransformerFactory(program)
 
   const transformResult = ts.transform(source, [transformerFactory])
   const printer = ts.createPrinter({
@@ -32,14 +34,11 @@ function transform (fileName, sourceText) {
   return printer.printNode(ts.EmitHint.SourceFile, transformResult.transformed[0], transformResult.transformed[0])
 }
 
-/**
- * @param {{ defaultLibraryFuncsToInclude?: string[]; exportedRuntimeMethods?: string[]; modifyOutput?: (output: string) => string }=} options
- */
-exports.default = function (options) {
-  const defaultLibraryFuncsToInclude = (options ? options.defaultLibraryFuncsToInclude : []) || []
-  const exportedRuntimeMethods = (options ? options.exportedRuntimeMethods : []) || []
-  const defaultModify = _ => _
-  const modifyOutput = (options ? options.modifyOutput : defaultModify) || defaultModify
+export default function (options?: PluginOptions): Plugin {
+  const defaultLibraryFuncsToInclude = options?.defaultLibraryFuncsToInclude ?? []
+  const exportedRuntimeMethods = options?.exportedRuntimeMethods ?? []
+  const defaultModify = <T>(_: T): T => _
+  const modifyOutput = options?.modifyOutput ?? defaultModify
 
   return {
     name: 'ts-transform-emscriten',
diff --git a/packages/rollup-plugin-emscripten-esm-library/tsconfig.json b/packages/rollup-plugin-emscripten-esm-library/tsconfig.json
new file mode 100644
index 00000000..63242fe6
--- /dev/null
+++ b/packages/rollup-plugin-emscripten-esm-library/tsconfig.json
@@ -0,0 +1,17 @@
+{
+  "extends": "../shared/tsconfig.base.json",
+  "compilerOptions": {
+    "target": "ES2019",
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "strict": true,
+    "declaration": true,
+    "sourceMap": true,
+    "declarationMap": true,
+    "outDir": "lib"
+  },
+  "include": [
+    "./src/**/*.ts",
+    "../../runtime/src/typings/*.d.ts"
+  ]
+}
diff --git a/packages/ts-transform-emscripten-esm-library/.gitignore b/packages/ts-transform-emscripten-esm-library/.gitignore
new file mode 100644
index 00000000..502167fa
--- /dev/null
+++ b/packages/ts-transform-emscripten-esm-library/.gitignore
@@ -0,0 +1 @@
+/lib
diff --git a/packages/ts-transform-emscripten-esm-library/.npmignore b/packages/ts-transform-emscripten-esm-library/.npmignore
new file mode 100644
index 00000000..a6f4a228
--- /dev/null
+++ b/packages/ts-transform-emscripten-esm-library/.npmignore
@@ -0,0 +1,7 @@
+.vscode
+node_modules
+/src
+.gitignore
+.npmignore
+tsconfig.json
+*.map
diff --git a/packages/ts-transform-emscripten-esm-library/README.md b/packages/ts-transform-emscripten-esm-library/README.md
new file mode 100644
index 00000000..95a3368e
--- /dev/null
+++ b/packages/ts-transform-emscripten-esm-library/README.md
@@ -0,0 +1 @@
+# @emnapi/ts-transform-emscripten-esm-library
diff --git a/packages/ts-transform-emscripten-esm-library/package.json b/packages/ts-transform-emscripten-esm-library/package.json
new file mode 100644
index 00000000..6f0a96f6
--- /dev/null
+++ b/packages/ts-transform-emscripten-esm-library/package.json
@@ -0,0 +1,24 @@
+{
+  "name": "@emnapi/ts-transform-emscripten-esm-library",
+  "version": "1.0.0",
+  "description": "Using ESM to write Emscripten JavaScript library",
+  "type": "commonjs",
+  "main": "./lib/index.js",
+  "types": "./lib/index.d.ts",
+  "scripts": {
+    "build": "tsc"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/toyobayashi/emnapi.git"
+  },
+  "author": "toyobayashi",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/toyobayashi/emnapi/issues"
+  },
+  "homepage": "https://github.com/toyobayashi/emnapi/tree/main/packages/ts-transform-emscripten-esm-library#readme",
+  "publishConfig": {
+    "access": "public"
+  }
+}
diff --git a/packages/emnapi/transformer/src/esm.ts b/packages/ts-transform-emscripten-esm-library/src/index.ts
similarity index 99%
rename from packages/emnapi/transformer/src/esm.ts
rename to packages/ts-transform-emscripten-esm-library/src/index.ts
index cd2f8c5b..0151aa5d 100644
--- a/packages/emnapi/transformer/src/esm.ts
+++ b/packages/ts-transform-emscripten-esm-library/src/index.ts
@@ -328,10 +328,12 @@ class Transformer {
   }
 }
 
-export default function createTransformer (program: Program): TransformerFactory<SourceFile> {
+function createTransformerFactory (program: Program): TransformerFactory<SourceFile> {
   return (context) => {
     const transformer = new Transformer(context, program)
 
     return transformer.transform
   }
 }
+
+export { createTransformerFactory }
diff --git a/packages/ts-transform-emscripten-esm-library/tsconfig.json b/packages/ts-transform-emscripten-esm-library/tsconfig.json
new file mode 100644
index 00000000..63242fe6
--- /dev/null
+++ b/packages/ts-transform-emscripten-esm-library/tsconfig.json
@@ -0,0 +1,17 @@
+{
+  "extends": "../shared/tsconfig.base.json",
+  "compilerOptions": {
+    "target": "ES2019",
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "strict": true,
+    "declaration": true,
+    "sourceMap": true,
+    "declarationMap": true,
+    "outDir": "lib"
+  },
+  "include": [
+    "./src/**/*.ts",
+    "../../runtime/src/typings/*.d.ts"
+  ]
+}
diff --git a/packages/ts-transform-emscripten-parse-tools/.gitignore b/packages/ts-transform-emscripten-parse-tools/.gitignore
new file mode 100644
index 00000000..502167fa
--- /dev/null
+++ b/packages/ts-transform-emscripten-parse-tools/.gitignore
@@ -0,0 +1 @@
+/lib
diff --git a/packages/ts-transform-emscripten-parse-tools/.npmignore b/packages/ts-transform-emscripten-parse-tools/.npmignore
new file mode 100644
index 00000000..a6f4a228
--- /dev/null
+++ b/packages/ts-transform-emscripten-parse-tools/.npmignore
@@ -0,0 +1,7 @@
+.vscode
+node_modules
+/src
+.gitignore
+.npmignore
+tsconfig.json
+*.map
diff --git a/packages/ts-transform-emscripten-parse-tools/package.json b/packages/ts-transform-emscripten-parse-tools/package.json
new file mode 100644
index 00000000..524b158f
--- /dev/null
+++ b/packages/ts-transform-emscripten-parse-tools/package.json
@@ -0,0 +1,25 @@
+{
+  "name": "@emnapi/ts-transform-emscripten-parse-tools",
+  "version": "0.44.0",
+  "private": true,
+  "description": "",
+  "type": "commonjs",
+  "main": "./lib/index.js",
+  "types": "./lib/index.d.ts",
+  "scripts": {
+    "build": "tsc"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/toyobayashi/emnapi.git"
+  },
+  "author": "toyobayashi",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/toyobayashi/emnapi/issues"
+  },
+  "homepage": "https://github.com/toyobayashi/emnapi/tree/main/packages/ts-transform-emscripten-parse-tools",
+  "publishConfig": {
+    "access": "public"
+  }
+}
diff --git a/packages/emnapi/transformer/src/index.ts b/packages/ts-transform-emscripten-parse-tools/src/index.ts
similarity index 99%
rename from packages/emnapi/transformer/src/index.ts
rename to packages/ts-transform-emscripten-parse-tools/src/index.ts
index 7f089c90..0dd01d3b 100644
--- a/packages/emnapi/transformer/src/index.ts
+++ b/packages/ts-transform-emscripten-parse-tools/src/index.ts
@@ -20,11 +20,13 @@ import type {
   Statement
 } from 'typescript'
 
-import * as ts from 'typescript'
+import ts = require('typescript')
 import { join } from 'path'
 
 export interface DefineOptions {
-  defines?: Record<string, any>
+  defines?: {
+    MEMORY64?: 0 | 1
+  }
 }
 
 function isEmscriptenMacro (text: string): boolean {
@@ -733,7 +735,7 @@ function createTransformerFactory (_program: Program, config: DefineOptions): Tr
       // inject HEAP_DATA_VIEW
       const injectedSrc = ts.visitEachChild(transformedSrc, transform.functionLikeDeclarationVisitor, context)
 
-      const doNotInsertImport = join(__dirname, '../../src/core/init.ts')
+      const doNotInsertImport = join(__dirname, '../../emnapi/src/core/init.ts')
       if (src.fileName === doNotInsertImport) {
         return injectedSrc
       }
@@ -781,4 +783,4 @@ function createTransformerFactory (_program: Program, config: DefineOptions): Tr
   }
 }
 
-export default createTransformerFactory
+export { createTransformerFactory }
diff --git a/packages/ts-transform-emscripten-parse-tools/tsconfig.json b/packages/ts-transform-emscripten-parse-tools/tsconfig.json
new file mode 100644
index 00000000..63242fe6
--- /dev/null
+++ b/packages/ts-transform-emscripten-parse-tools/tsconfig.json
@@ -0,0 +1,17 @@
+{
+  "extends": "../shared/tsconfig.base.json",
+  "compilerOptions": {
+    "target": "ES2019",
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "strict": true,
+    "declaration": true,
+    "sourceMap": true,
+    "declarationMap": true,
+    "outDir": "lib"
+  },
+  "include": [
+    "./src/**/*.ts",
+    "../../runtime/src/typings/*.d.ts"
+  ]
+}
diff --git a/packages/ts-transform-macro/.gitignore b/packages/ts-transform-macro/.gitignore
new file mode 100644
index 00000000..502167fa
--- /dev/null
+++ b/packages/ts-transform-macro/.gitignore
@@ -0,0 +1 @@
+/lib
diff --git a/packages/ts-transform-macro/.npmignore b/packages/ts-transform-macro/.npmignore
new file mode 100644
index 00000000..a6f4a228
--- /dev/null
+++ b/packages/ts-transform-macro/.npmignore
@@ -0,0 +1,7 @@
+.vscode
+node_modules
+/src
+.gitignore
+.npmignore
+tsconfig.json
+*.map
diff --git a/packages/ts-transform-macro/README.md b/packages/ts-transform-macro/README.md
new file mode 100644
index 00000000..79848051
--- /dev/null
+++ b/packages/ts-transform-macro/README.md
@@ -0,0 +1 @@
+# @emnapi/ts-transform-macro
diff --git a/packages/ts-transform-macro/package.json b/packages/ts-transform-macro/package.json
new file mode 100644
index 00000000..38332db9
--- /dev/null
+++ b/packages/ts-transform-macro/package.json
@@ -0,0 +1,27 @@
+{
+  "name": "@emnapi/ts-transform-macro",
+  "version": "1.0.0",
+  "description": "C style define macros for TypeScript",
+  "type": "commonjs",
+  "main": "./lib/index.js",
+  "types": "./lib/index.d.ts",
+  "scripts": {
+    "build": "tsc"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/toyobayashi/emnapi.git"
+  },
+  "author": "toyobayashi",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/toyobayashi/emnapi/issues"
+  },
+  "homepage": "https://github.com/toyobayashi/emnapi/tree/main/packages/ts-transform-emscripten-macro#readme",
+  "publishConfig": {
+    "access": "public"
+  },
+  "dependencies": {
+    "ts-clone-node": "^3.0.0"
+  }
+}
diff --git a/packages/emnapi/transformer/src/macro.ts b/packages/ts-transform-macro/src/index.ts
similarity index 99%
rename from packages/emnapi/transformer/src/macro.ts
rename to packages/ts-transform-macro/src/index.ts
index 35bf6ebb..5ef3e6b5 100644
--- a/packages/emnapi/transformer/src/macro.ts
+++ b/packages/ts-transform-macro/src/index.ts
@@ -23,7 +23,7 @@ import type {
   Declaration
 } from 'typescript'
 
-import * as ts from 'typescript'
+import ts = require('typescript')
 import { cloneNode } from 'ts-clone-node'
 
 function preserveMultiLine (node: Node, sourceNode: Node): Node {
@@ -447,4 +447,4 @@ function createTransformerFactory (program: Program, config: TransformOptions):
   }
 }
 
-export default createTransformerFactory
+export { createTransformerFactory }
diff --git a/packages/ts-transform-macro/tsconfig.json b/packages/ts-transform-macro/tsconfig.json
new file mode 100644
index 00000000..e9e556f3
--- /dev/null
+++ b/packages/ts-transform-macro/tsconfig.json
@@ -0,0 +1,17 @@
+{
+  "extends": "../shared/tsconfig.base.json",
+  "compilerOptions": {
+    "target": "ES2019",
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "strict": true,
+    "declaration": true,
+    "sourceMap": true,
+    "declarationMap": true,
+    "outDir": "lib"
+  },
+  "include": [
+    "./src/**/*",
+    "../../runtime/src/typings/*.d.ts"
+  ]
+}