FastPII is a production-grade PII detection SDK for European personal identifiers. It detects, validates, and transforms PII in text using checksum validation for identifiers like rodné číslo, PESEL, Steuer-ID, and SIREN.

How do I install FastPII?

Install FastPII with pip: pip install fastpii. It requires Python 3.10 or newer and has zero core dependencies.

What countries does FastPII support?

FastPII supports 4 regions: Czech Republic (15 detectors), Poland (6 detectors), Germany (6 detectors), and France (6 detectors). This includes identifiers like rodné číslo, IČO, DIČ, PESEL, NIP, REGON, Steuer-ID, USt-IdNr, SIREN, SIRET, and INSEE/NIR.

Does FastPII have external dependencies?

No. FastPII has zero core dependencies. Optional integrations like FastAPI and LangChain are available through pip extras: pip install fastpii[fastapi] or pip install fastpii[langchain].

How does FastPII validate identifiers?

FastPII uses country-specific checksum algorithms: Mod 11 for rodné číslo and IČO, Mod 10 for PESEL, ISO 7064 MOD 11,10 for Steuer-ID, Luhn for SIREN/SIRET, and Mod-97 for INSEE/NIR. This ensures only structurally valid identifiers are detected.

Credit Card - FastPII Docs

Name: FastPII SDK
Author: FastPII

Purpose

Use the credit_card detector for Czech credit card numbers.

This detector uses Luhn checksum validation to verify credit card numbers.

Detector Name

credit_card

Region: cz

Supported Formats

16-digit card numbers
Numbers with spaces: XXXX XXXX XXXX XXXX
Numbers without spaces: XXXXXXXXXXXXXXXX

Usage

from fastpii import FastPII, DEFAULT_PRIORITY
from fastpii.countries.cz import CzechPack

engine = FastPII(priority=DEFAULT_PRIORITY)
engine.register(CzechPack())

result = engine.detect("Card: 4532 1234 5678 9012")

Validation

result = engine.validate("4532123456789012", "credit_card")
# result.is_valid → True/False (Luhn checksum)

Notes

Uses Luhn checksum algorithm
Detects major card number ranges

Credit Card