Package Information
Released: 4 mo ago
Downloads: 12 weekly / 158 monthly
Latest Version: 0.1.0
Author: Jesús Rosa Bilbao
Documentation
n8n-nodes-anonymizer
This is an n8n community node that provides privacy-preserving PII anonymization for LLM integrations using the Proxy Sandwich pattern.
It anonymizes Personally Identifiable Information (PII) before sending text to LLMs and restores original values afterward, ensuring sensitive data never reaches external APIs.
n8n is a fair-code licensed workflow automation platform.
Operations
Anonymize
Detects and replaces PII with tokenized placeholders. Supports both plain text and JSON input.
Detected entity types:
| Entity | Detection Method | Validation |
|---|---|---|
| Regex | RFC 5322 | |
| Credit Card | Regex | Luhn checksum |
| IBAN | Regex | ISO 13616 mod-97 |
| DNI (Spain) | Regex | Letter mod-23 |
| Phone | Regex | Digit count heuristic |
| IP Address | Regex | Octet range |
| Person Name | NLP (compromise) | Length + stopword filter |
| Organization | NLP (compromise) | Length + stopword filter |
| Location | NLP (compromise) | Length + stopword filter |
Example:
- Input:
"Contact John at john@example.com" - Output text:
"Contact {{NAME_1}} at {{EMAIL_1}}" - Output vault:
{"{{NAME_1}}": "John", "{{EMAIL_1}}": "john@example.com"}
Restore
Replaces anonymized tokens back with original values using the Mapping Vault from the Anonymize step.
Usage (Proxy Sandwich Pattern)
- Anonymizer (Anonymize) → receives user text, outputs anonymized text + vault
- LLM Node (GPT, Claude, etc.) → processes anonymized text
- Anonymizer (Restore) → receives LLM response + vault, outputs restored text
The LLM never sees real PII. The user gets fully contextualized output.
Installation
Follow the n8n community nodes installation guide.
Install via npm:
npm install n8n-nodes-anonymizer
Compatibility
- n8n >= 1.0.0
- Node.js >= 18.0.0