diff --git a/package-lock.json b/package-lock.json
index 16a5de14a6..133588885f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,6 +9,7 @@
       "workspaces": [
         "packages/cli",
         "packages/cli-utils",
+        "packages/core",
         "packages/gatsby-plugin",
         "packages/html-templates",
         "packages/next-plugin",
@@ -3083,6 +3084,10 @@
       "resolved": "packages/cli-utils",
       "link": true
     },
+    "node_modules/@bundle-stats/core": {
+      "resolved": "packages/core",
+      "link": true
+    },
     "node_modules/@bundle-stats/html-templates": {
       "resolved": "packages/html-templates",
       "link": true
@@ -42149,6 +42154,13 @@
         "node": ">= 16.0"
       }
     },
+    "packages/core": {
+      "version": "4.4.0",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 16.0"
+      }
+    },
     "packages/gatsby-plugin": {
       "name": "gatsby-plugin-bundle-stats",
       "version": "4.4.0",
@@ -44411,6 +44423,9 @@
         "typescript": "5.1.3"
       }
     },
+    "@bundle-stats/core": {
+      "version": "file:packages/core"
+    },
     "@bundle-stats/html-templates": {
       "version": "file:packages/html-templates",
       "requires": {
diff --git a/package.json b/package.json
index 3c23c94fb3..d34fafb777 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,7 @@
   "workspaces": [
      "packages/cli",
      "packages/cli-utils",
+     "packages/core",
      "packages/gatsby-plugin",
      "packages/html-templates",
      "packages/next-plugin",
diff --git a/packages/core/.eslintignore b/packages/core/.eslintignore
new file mode 100644
index 0000000000..183a6839bb
--- /dev/null
+++ b/packages/core/.eslintignore
@@ -0,0 +1,5 @@
+node_modules
+lib
+lib-esm
+types
+!**/.*.js
diff --git a/packages/core/.eslintrc.js b/packages/core/.eslintrc.js
new file mode 100644
index 0000000000..9779f4e0f2
--- /dev/null
+++ b/packages/core/.eslintrc.js
@@ -0,0 +1,7 @@
+module.exports = {
+  rules: {
+    'import/no-cycle': ['warn', { maxDepth: 1 }],
+    'object-curly-newline': 'off',
+    'function-paren-newline': 'off',
+  },
+};
diff --git a/packages/core/.gitignore b/packages/core/.gitignore
new file mode 100644
index 0000000000..05d435296a
--- /dev/null
+++ b/packages/core/.gitignore
@@ -0,0 +1,12 @@
+node_modules/
+.DS_Store
+Thumbs.db
+.idea/
+.vscode/
+*.sublime-project
+*.sublime-workspace
+*.log
+yarn.lock
+lib
+lib-esm
+types
diff --git a/packages/core/.npmignore b/packages/core/.npmignore
new file mode 100644
index 0000000000..bf3cf0fe94
--- /dev/null
+++ b/packages/core/.npmignore
@@ -0,0 +1,10 @@
+node_modules
+**/__tests__
+__fixtures__
+.editorconfig
+.eslintignore
+.eslintrc.js
+jsconfig.json
+jest.config.js
+jest.global.js
+tsconfig.*
diff --git a/packages/core/README.md b/packages/core/README.md
new file mode 100644
index 0000000000..fddf3820f7
--- /dev/null
+++ b/packages/core/README.md
@@ -0,0 +1 @@
+# @bundle-stats/core
diff --git a/packages/core/jest.config.js b/packages/core/jest.config.js
new file mode 100644
index 0000000000..d21017f9ee
--- /dev/null
+++ b/packages/core/jest.config.js
@@ -0,0 +1,5 @@
+module.exports = {
+  preset: 'ts-jest/presets/js-with-ts',
+  testEnvironment: 'node',
+  testPathIgnorePatterns: ['/__fixtures__/', '/node_modules/', '/lib/', '/lib-esm/', '/types/'],
+};
diff --git a/packages/core/package.json b/packages/core/package.json
new file mode 100644
index 0000000000..2dc21ceb18
--- /dev/null
+++ b/packages/core/package.json
@@ -0,0 +1,37 @@
+{
+  "name": "@bundle-stats/core",
+  "version": "4.4.0",
+  "description": "BundleStats core functionality",
+  "main": "lib/index.js",
+  "module": "lib-esm/index.js",
+  "types": "types/index.d.ts",
+  "sideEffects": false,
+  "engines": {
+    "node": ">= 16.0"
+  },
+  "directories": {
+    "lib": "lib"
+  },
+  "scripts": {
+    "build": "npm run build-lib && npm run build-esm",
+    "build-lib": "rm -fr ./lib && npx tsc --rootDir ./src --project tsconfig.lib.json --outDir ./lib",
+    "build-esm": "rm -fr ./lib-esm && rm -fr ./types && npx tsc --rootDir ./src --project tsconfig.esm.json --outDir ./lib-esm",
+    "lint": "npx eslint . --ext .js,.ts --resolve-plugins-relative-to ../../",
+    "test": "jest"
+  },
+  "keywords": [],
+  "author": {
+    "name": "Viorel Cojocaru",
+    "email": "vio@beanon.com",
+    "url": "https://beanon.com"
+  },
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/relative-ci/bundle-stats.git"
+  },
+  "bugs": {
+    "url": "https://github.com/relative-ci/bundle-stats/issues"
+  },
+  "homepage": "https://github.com/relative-ci/bundle-stats/blob/master/packages/core#readme"
+}
diff --git a/packages/core/src/index.test.ts b/packages/core/src/index.test.ts
new file mode 100644
index 0000000000..af473f42ca
--- /dev/null
+++ b/packages/core/src/index.test.ts
@@ -0,0 +1,33 @@
+import filter from './index';
+
+/* eslint-disable import/no-relative-packages */
+import webpackStats from '../../utils/__fixtures__/webpack-stats-1';
+import webpackStatsExtracted from '../../utils/__fixtures__/webpack-stats-1.extracted';
+import webpackStatsConcatenatedModules from '../../utils/__fixtures__/webpack-stats-3';
+import webpackStatsConcatenatedModulesExtracted from '../../utils/__fixtures__/webpack-stats-3.extracted';
+/* eslint-enable import/no-relative-packages */
+
+describe('Webpack filter', () => {
+  test('should return empty meta', () => {
+    const actual = filter({
+      ...webpackStats,
+      builtAt: undefined,
+      hash: undefined,
+    } as any);
+    expect({
+      ...webpackStatsExtracted,
+      builtAt: undefined,
+      hash: undefined,
+    }).toEqual(actual);
+  });
+
+  test('should return meta', () => {
+    const actual = filter(webpackStats as any);
+    expect(actual).toEqual(webpackStatsExtracted);
+  });
+
+  test('should filter concatenated modules', () => {
+    const actual = filter(webpackStatsConcatenatedModules as any);
+    expect(actual).toEqual(webpackStatsConcatenatedModulesExtracted);
+  });
+});
diff --git a/packages/core/src/index.ts b/packages/core/src/index.ts
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/packages/core/tsconfig.esm.json b/packages/core/tsconfig.esm.json
new file mode 100644
index 0000000000..5a3c40e41e
--- /dev/null
+++ b/packages/core/tsconfig.esm.json
@@ -0,0 +1,11 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "target": "ES2019",
+    "module": "ES6",
+    "declaration": true,
+    "declarationDir": "./types",
+    "noEmit": false
+  },
+  "exclude": ["**/*.test.ts"]
+}
diff --git a/packages/core/tsconfig.json b/packages/core/tsconfig.json
new file mode 100644
index 0000000000..52d43eaaa9
--- /dev/null
+++ b/packages/core/tsconfig.json
@@ -0,0 +1,4 @@
+{
+  "extends": "../../tsconfig.json",
+  "include": ["src/**/*"]
+}
diff --git a/packages/core/tsconfig.lib.json b/packages/core/tsconfig.lib.json
new file mode 100644
index 0000000000..ef05bcae8d
--- /dev/null
+++ b/packages/core/tsconfig.lib.json
@@ -0,0 +1,7 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "noEmit": false
+  },
+  "exclude": ["**/*.test.ts"]
+}