How to Extract Data from Passports and IDs
Passports, driver's licenses, and national ID cards contain structured data in specific formats. OCR can extract this data for verification, record-keeping, and form-filling — but accuracy and privacy are critical concerns.
Understanding the Machine Readable Zone (MRZ)
Most modern passports and ID cards include a Machine Readable Zone (MRZ) — two or three lines of text at the bottom of the data page using a standardized OCR-B font. The MRZ encodes the holder's name, document number, nationality, birth date, expiration date, and a check digit for verification.
MRZ text uses a fixed-width, monospace font designed specifically for machine reading. When the MRZ is clean and unobstructed, OCR accuracy can exceed 99%. However, stamps, visa stickers, and wear can partially obscure the MRZ, reducing accuracy.
Data Fields You Can Extract
| Field | Location | Accuracy |
|---|---|---|
| Full name | Data page + MRZ | 95%+ |
| Document number | Data page + MRZ | 98%+ (MRZ) |
| Date of birth | Data page + MRZ | 97%+ (MRZ) |
| Expiration date | Data page + MRZ | 97%+ (MRZ) |
| Nationality | MRZ | 96%+ |
| Photo | Data page | N/A (image) |
Tips for Accurate Extraction
- Photograph flat and straight. Curved or angled shots distort the MRZ characters. Place the document on a flat surface.
- Use even lighting. Avoid glare from the laminated surface. Overhead lighting or diffused natural light works best.
- Include the full MRZ. Both lines (or all three for passports) must be fully visible. Cutoff MRZ lines cannot be reliably decoded.
- Resolve check digits. The MRZ includes built-in check digits that verify data integrity. Use these to validate extracted values.
- Handle multi-language names. Names in non-Latin scripts (Arabic, Chinese, etc.) appear in both native script and MRZ transliteration. Extract both versions.
Privacy Considerations
⚠️ Important: Handle ID Documents Carefully
- • Passports and IDs contain highly sensitive personal data. Only process documents you own or have explicit authorization to process.
- • Use tools that process data locally or in-memory without persistent storage. FastOCR does not store uploaded files after processing.
- • Never share extracted ID data via unencrypted channels.
- • Comply with local data protection regulations (GDPR, CCPA, etc.) when storing extracted identity data.
- • Delete extracted data when it is no longer needed for its stated purpose.
Common Use Cases
- • Auto-filling visa and immigration forms
- • KYC (Know Your Customer) identity verification
- • Digitizing personal records for backup
- • Processing employee ID cards for access systems
- • Extracting data from expired IDs for archival purposes
Extract ID Data — Free
FastOCR extracts text from passport and ID images. Files are processed in-memory and not stored. No registration required.