n8n-nodes-data-quality-toolkit

A lightweight n8n community node for validating, cleaning, comparing, and scoring workflow data before sending it to CRMs, APIs, databases, or AI systems.

This node intentionally uses no runtime external dependencies. All validation and cleaning logic is implemented with native TypeScript/JavaScript to keep the package simple and suitable for community-node review.

Operations

Validate Fields

Checks configured fields for:

• Required value
• Empty string handling
• Basic type validation: string, number, boolean, email, URL, date, phone

Output example:

{
  "customer": {
    "email": "test@example.com"
  },
  "dataQuality": {
    "valid": true,
    "errors": []
  }
}

Clean Object

Cleans incoming item JSON by:

• Trimming strings
• Collapsing repeated whitespace
• Optionally removing empty fields

Find Missing Values

Checks a comma-separated list of required dot-path fields and returns missing fields.

Example field list:

customer.name, customer.email, order.id

Compare Records

Compares two objects, usually before and after, and returns changed fields.

Expected input example:

{
  "before": { "name": "ABC", "revenue": 100 },
  "after": { "name": "ABC", "revenue": 150 }
}

Generate Quality Report

Runs field validation and returns a simple score from 0 to 100.

Why this node is useful

Many workflows fail because bad or incomplete data reaches the next system. This node gives workflow builders a reusable place to validate and clean data before calling APIs such as CRMs, billing systems, spreadsheets, databases, or AI extraction steps.

Installation for local testing

npm install
npm run build
npm link

Then link it inside your n8n custom folder:

mkdir -p ~/.n8n/custom
cd ~/.n8n/custom
npm link n8n-nodes-data-quality-toolkit

Restart n8n.

Docker self-hosted example

If you keep custom nodes in C:/n8n-custom on Windows:

docker run -it --rm \
  -p 5678:5678 \
  -v n8n_data:/home/node/.n8n \
  -v C:/n8n-custom:/home/node/.n8n/custom \
  -e N8N_CUSTOM_EXTENSIONS=/home/node/.n8n/custom \
  n8nio/n8n

Build this package and copy/link it under the mounted custom folder.

Publishing

Before publishing:

npm run lint
npm run build
npm publish --provenance --access public

For n8n community-node verification, keep runtime dependencies empty, publish from GitHub Actions with provenance, and ensure the package name starts with n8n-nodes-.

License

MIT

Tests

This package uses Node.js built-in test runner, so there are no test-framework runtime dependencies.

npm install
npm test

The tests cover the core no-dependency helper logic:

• empty value detection
• nested path reads/writes
• email, URL, phone, date, number and boolean validation
• string/object cleaning
• changed-field comparison between records

Release process

For n8n community-node submission, prefer publishing from GitHub Actions so npm provenance is attached.

Dry run:

npm run release:dry-run

Patch release:

npm run release:patch

Then push the version commit and tag:

git push --follow-tags

Create a GitHub Release for the new tag. The included .github/workflows/publish.yml workflow will run tests and publish to npm with provenance.