The Privacy Layer for your AI Stack.

Sanitize prompts in real-time with our open-source SDK. Run PII detection locally via WebAssembly or deploy the Sidecar to your VPC for centralized governance.

npm i rehydra

import { createAnonymizer } from 'rehydra';

const anonymizer = createAnonymizer({
  ner: { mode: 'quantized' },
  semantic: { enabled: true }
});

await anonymizer.initialize();

const result = await anonymizer.anonymize(
  'Hello John Smith from Acme Corp in Berlin!'
);
Hello <PII type="PERSON" gender="male" id="1" /> 
from <PII type="ORG" id="2" /> in 
<PII type="LOCATION" scope="city" country="Germany" id="3" />

Guides

Getting Started.

Here are some of our Getting Started guides to fast track your compliant AI usage.

FAQ

Frequently Asked Questions

Does the SDK require an internet connection?

Can I detect custom identifiers specific to my domain (e.g., Order Numbers)?

You can define custom regex-based recognizers using createCustomIdRecognizer. You provide a pattern, a name, and a PII type (usually CASE_ID or CUSTOMER_ID). Example:

Is the PII mapping data secure?

What is the difference between the "standard" and "quantized" NER models?

How does rehydra improve Machine Translation (MT) context for anonymized entities?