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What is Blindfold?

Blindfold is a privacy-first infrastructure API that helps you securely protect sensitive data (PII) before sending it to AI models and third-party services. It provides automated detection and protection of over 50 types of personally identifiable information.

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The Problem

When building AI applications, you often need to send user data to large language models (OpenAI, Anthropic, etc.). However, this data may contain sensitive information like:
  • Personal names and emails
  • Phone numbers and addresses
  • Credit card numbers and SSNs
  • Medical records and IDs
  • IP addresses and URLs
Sending this data directly to third-party AI providers can create compliance risks (GDPR, HIPAA, EU AI Act) and privacy concerns.

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The Solution

Blindfold sits between your application and AI services, automatically detecting and protecting sensitive data:
  1. Send us your text with sensitive information
  2. We return protected text (tokenized/masked/redacted)
  3. You send safe text to AI models without privacy risks
  4. We restore original data (if needed) after getting the AI response

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Key Features

Tokenization

Replace sensitive data with reversible tokens like <PERSON_1>. Perfect for AI interactions where you need to restore original values.

Masking

Partially hide data (e.g., ****-****-****-1234). Useful for displaying data while maintaining privacy.

Redaction

Permanently remove sensitive information. Ideal for complete data removal without the ability to restore.

Synthesis

Replace real data with realistic fake data using Faker. Great for testing and demos.

Hashing

Convert data to deterministic hashes. Useful for analytics and matching without exposing original values.

Encryption

Encrypt data using AES encryption. Reversible with proper encryption key.

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Supported PII Types

Blindfold automatically detects 50+ types of sensitive information, including:
  • Personal: Names, Email addresses, Phone numbers
  • Financial: Credit cards, IBANs, Bank accounts
  • Government IDs: SSN, Driver licenses, Passports
  • Medical: Medical license numbers, Patient IDs
  • Technical: IP addresses, URLs, API keys
  • Location: Addresses, GPS coordinates

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Getting Started

Quick Start Guide

Get up and running in 5 minutes with your first API call.

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Choose Your Integration Method

Python SDK

Official Python SDK with sync and async support.

JavaScript SDK

Official JavaScript/TypeScript SDK for Node.js and browsers.

REST API

Direct HTTP API access with any language or tool.

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Learn by Example

See Examples

Explore practical examples and common use cases.

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Why Blindfold?

Developer-Friendly

Simple SDKs and REST API. Get started in minutes with comprehensive documentation.

Production-Ready

Built for scale with async support, error handling, and audit logging.

Compliance-First

Help meet GDPR, HIPAA, and EU AI Act requirements with automated PII detection.

Multi-Language Support

Detect PII in English, Czech, German, French, Spanish, Italian, Polish, and Slovak.