javascript-obfuscator plugin and loader for Webpack@5


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This plugin requires Webpack@5. If you depend on Webpack@4, please use version 2 of the plugin.

Install the plugin with NPM and add it to your devDependencies:

npm install --save-dev javascript-obfuscator webpack-obfuscator

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``javascript
var WebpackObfuscator = require('webpack-obfuscator');

// ...

// webpack plugins array
plugins: [
new WebpackObfuscator ({
rotateStringArray: true
}, ['excluded_bundle_name.js'])
]
`

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Define a rule in your webpack config and use the obfuscator-loader as the last of your loaders for your modules. You can add the enforce: 'post' flag to ensure the loader will be called after normal loaders:

`javascript
var WebpackObfuscator = require('webpack-obfuscator');

// webpack loader rules array
rules: [
{
test: /\.js$/,
exclude: [
path.resolve(__dirname, 'excluded_file_name.js')
],
enforce: 'post',
use: {
loader: WebpackObfuscator.loader,
options: {
rotateStringArray: true
}
}
}
]
`

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Type: Object Default: null

Options for javascript-obfuscator. Should be passed exactly like described on their page.

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Type: Array or String Default: []

Bundle name is output file name after webpack compilation. With multiple webpack entries you can set bundle name in output object with aliases [name] or [id].

Syntax for excludes array is syntax for multimatch package. You can see examples on package page.

Few syntax examples: ['excluded_bundle_name.js', '**_bundle_name.js'] or 'excluded_bundle_name.js'


Example:
`
// webpack.config.js
'use strict';

const JavaScriptObfuscator = require('webpack-obfuscator');

module.exports = {
entry: {
'abc': './test/input/index.js',
'cde': './test/input/index1.js'
},
output: {
path: 'dist',
filename: '[name].js' // output: abc.js, cde.js
},
plugins: [
new JavaScriptObfuscator({
rotateStringArray: true
}, ['abc.js'])
]
};
`

Can be used to bypass obfuscation of some files.

---

Pro API Support

The plugin and loader support the obfuscator.io Pro API for cloud-based obfuscation (requires javascript-obfuscator ^5.0.0). This allows you to use Virtual Machine-based obfuscation available through the JavaScript Obfuscator Pro API.

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`javascript
var WebpackObfuscator = require('webpack-obfuscator');

plugins: [
new WebpackObfuscator(
{
// obfuscator options
rotateStringArray: true
},
['excluded_bundle_name.js'], // excludes
{
// Pro API configuration
apiToken: 'your-api-token-from-obfuscator.io',
timeout: 300000 // optional, request timeout in ms (default: 5 minutes)
},
(message) => {
// optional progress callback
console.log('Obfuscation progress:', message);
}
)
]
`

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`javascript
var WebpackObfuscator = require('webpack-obfuscator');

rules: [
{
test: /\.js$/,
enforce: 'post',
use: {
loader: WebpackObfuscator.loader,
options: {
rotateStringArray: true,
// Pro API configuration
proApiConfig: {
apiToken: 'your-api-token-from-obfuscator.io',
timeout: 300000 // optional
},
// optional progress callback
onProgress: (message) => {
console.log('Obfuscation progress:', message);
}
}
}
}
]
`

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#### proApiConfig
Type: Object Default: undefined

Configuration object for the Pro API:

| Property | Type | Required | Default | Description |
|----------|------|----------|---------|-------------|
| apiToken | string | Yes | - | Your API token from obfuscator.io |
| timeout | number | No | 300000 | Request timeout in milliseconds (5 minutes) |

#### onProgress
Type: Function Default: undefined

Callback function that receives progress messages during obfuscation.

`typescript
type TProApiProgressCallback = (message: string) => void;
`

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The plugin exports TypeScript types for Pro API configuration:

`typescript
import WebpackObfuscator, { IProApiConfig, TProApiProgressCallback } from 'webpack-obfuscator';

const proApiConfig: IProApiConfig = {
apiToken: 'your-token',
timeout: 60000
};

const onProgress: TProApiProgressCallback = (message) => {
console.log(message);
};
``

---

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Copyright (C) 2025 Timofey Kachalov.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.