n8n-nodes-powercode

Execute custom JavaScript code with 58+ built-in libraries in n8n workflows.

Power Code is the ultimate code execution node for n8n. Unlike the built-in Code node that ships with zero libraries, Power Code comes pre-loaded with 58+ production-ready JavaScript libraries — from data processing and validation to blockchain and media processing.

n8n is a fair-code licensed workflow automation platform.

Installation

n8n Community Edition

1. Open your n8n instance
2. Go to Settings → Community Nodes
3. Click Install a community node
4. Enter: n8n-nodes-powercode
5. Click Install
6. Find "Power Code" in your node list

Docker Users

environment:
  - N8N_COMMUNITY_PACKAGES_ENABLED=true

Then install through the UI as shown above.

Operations

The Power Code node executes your custom JavaScript code in two modes:

• Run Once for All Items — Execute code once for all items. Access all items via $input.all() or items variable.
• Run Once for Each Item — Execute code once for each item. Access current item via $input.item or item variable.

All 58+ libraries are pre-loaded as global variables — no require() needed.

Complete Library List (58 Working Libraries)

Data Processing

lodash (_), dayjs, moment (moment-timezone), dateFns (date-fns), dateFnsTz (date-fns-tz), bytes, ms, uuid (as uuidv4), nanoid

Validation & Parsing

joi, validator, Ajv, yup, zod, qs

Files & Documents

ExcelJS (exceljs) — supports streaming read/write for large files, xlsxtream — streaming XLSX reader, XLSX (xlsx) — classic XLSX read/write, Papa (papaparse), ini, toml

Web & HTTP

axios, cheerio, FormData (form-data)

Text & Content

Handlebars, marked, htmlToText (html-to-text), xml2js, XMLParser (fast-xml-parser), YAML, pluralize, slug, stringSimilarity (string-similarity), fuzzy (fuse.js)

Security & Crypto

CryptoJS (crypto-js), jwt (jsonwebtoken), bcrypt (bcryptjs), forge (node-forge)

Specialized

QRCode (qrcode), iban, phoneNumber (libphonenumber-js)

Natural Language

franc (franc-min), compromise

Async Control

pRetry (p-retry)

Data Operations

jsonDiff (json-diff-ts), cronParser (cron-parser)

Blockchain & Crypto

web3, solana (@solana/web3.js), bitcoin (bitcoinjs-lib), secp256k1 (@noble/secp256k1), bip39 (@scure/bip39), ccxt, coinGecko (coingecko-api-v3)

Media Processing

ytdl (@distube/ytdl-core), ffmpeg (fluent-ffmpeg), ffmpegStatic (ffmpeg-static)

Usage Examples

Data Transformation with lodash & dayjs

const firstItem = items[0];
const name = _.get(firstItem, 'name', 'World');
return {
  greeting: 'Hello, ' + name + '!',
  timestamp: dayjs().format('YYYY-MM-DD HH:mm:ss'),
};

Web Scraping with axios & cheerio

const response = await axios.get('https://example.com/products');
const $ = cheerio.load(response.data);
const products = [];
$('.product-card').each((i, elem) => {
  products.push({
    title: $(elem).find('.title').text().trim(),
    price: parseFloat($(elem).find('.price').text().replace('$', '')),
    inStock: $(elem).find('.stock-status').hasClass('available'),
  });
});
return _.filter(products, 'inStock');

Excel File Processing (Streaming — supports large files)

// Read large Excel files with streaming (memory efficient)
const workbookReader = new ExcelJS.stream.xlsx.WorkbookReader(binaryData);
for await (const worksheetReader of workbookReader) {
  for await (const row of worksheetReader) {
    // Process each row without loading entire file into memory
    const values = row.values;
  }
}

// Write Excel files with streaming
const workbook = new ExcelJS.stream.xlsx.WorkbookWriter({ stream: fs.createWriteStream('output.xlsx') });
const sheet = workbook.addWorksheet('Report');
sheet.columns = [
  { header: 'Name', key: 'name' },
  { header: 'Email', key: 'email' },
];
items.forEach(item => sheet.addRow(item).commit());
await workbook.commit();

JWT Authentication

const token = jwt.sign(
  { userId: user.id, email: user.email },
  'your-secret-key',
  { expiresIn: '24h' }
);
const hashedPassword = await bcrypt.hash(password, 12);
return { token, hashedPassword };

Data Validation

const schema = joi.object({
  email: joi.string().email().required(),
  age: joi.number().min(18).max(100),
});
const { error, value } = schema.validate($input.item.json);
if (error) throw new Error(`Validation failed: ${error.message}`);
return value;

Compatibility

Compatible with n8n version 1.0+

Version History

1.2.0

• Added xlsx library for classic XLSX read/write support

1.1.0

• Initial release with 58 built-in libraries

Resources

• n8n community nodes documentation
• GitHub Repository