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PII Detection

PasteGuard uses Microsoft Presidio for PII detection, supporting 24 languages with automatic language detection.

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Supported Entities

EntityExamples
PERSONDr. Sarah Chen, John Smith
EMAIL_ADDRESSsarah.chen@hospital.org
PHONE_NUMBER+1-555-123-4567
CREDIT_CARD4111-1111-1111-1111
IBAN_CODEDE89 3704 0044 0532 0130 00
IP_ADDRESS192.168.1.1
LOCATIONNew York, 123 Main St
US_SSN123-45-6789
US_PASSPORT123456789
CRYPTOBitcoin addresses
URLhttps://example.com

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Language Support

PasteGuard supports 24 languages. The language is auto-detected from your input text. Available languages: Catalan, Chinese, Croatian, Danish, Dutch, English, Finnish, French, German, Greek, Italian, Japanese, Korean, Lithuanian, Macedonian, Norwegian, Polish, Portuguese, Romanian, Russian, Slovenian, Spanish, Swedish, Ukrainian

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Configure Languages

Languages must be installed during Docker build: 
LANGUAGES=en,de,fr docker compose build
If only one language is specified, language detection is skipped for better performance.

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Confidence Scoring

Each detected entity has a confidence score (0.0 - 1.0). The default threshold is 0.7.
  • Higher threshold = fewer false positives, might miss some PII
  • Lower threshold = catches more PII, more false positives
pii_detection:
  score_threshold: 0.7

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Response Headers

When PII is detected: 
X-PasteGuard-PII-Detected: true
X-PasteGuard-PII-Masked: true   # mask mode only
X-PasteGuard-Language: en
If the fallback language was used: 
X-PasteGuard-Language-Fallback: true