The Node.js SDK for Bangladesh Passport OCR

Why Bangladeshi Passport OCR is Difficult in Node.js

Building a reliable passport OCR pipeline from scratch is non-trivial for Bangladeshi documents. The Bangladeshi passport features a bilingual layout, combining Bangla (Bengali script) and English text on the same data page. Bangla script features complex conjunct characters, vowel diacritics (matras), and descender-rich letterforms that frequently cause segmentation errors in standard Node.js wrappers like Tesseract. Furthermore, the documents incorporate intricate security backgrounds, guilloche patterns, and the national emblem that introduce optical noise. Developing custom RegEx patterns in JavaScript to parse the Machine Readable Zone (MRZ) while correcting these script-specific challenges is highly brittle, often resulting in high manual review rates.

Enterprise-Grade Extraction with the StructOCR SDK

StructOCR simplifies document processing in your JavaScript ecosystem by replacing complex pipelines with a single async API call. Our service leverages pre-trained Deep Learning models optimized specifically for South Asian identity documents and the complexities of Bangla/English bilingual typography. Our passport mrz ocr api automatically handles perspective correction, denoising, and glare removal. Instead of returning raw, unstructured text strings, the StructOCR Node.js SDK provides standardized JSON output with validated fields. This capability is crucial for applications managing international borders, as it eliminates the need for manual parsing, delivering production-ready data directly to your Express, NestJS, or Next.js applications.

Production Use Cases

• Digital Onboarding (e-KYC): Reduce drop-off rates by pre-filling user data from Bangladeshi Passports into your fintech or digital services apps in under 2 seconds.
• Travel & Aviation Apps: Seamlessly integrate with Node.js backends for automated check-in systems and border management at hubs like Hazrat Shahjalal International Airport (DAC) in Dhaka.
• Financial Compliance: Ensure strict compliance with Bangladesh Bank and regional Anti-Money Laundering (AML) regulations by automatically and accurately verifying identity documents.

Implementation: Node.js SDK

The official Node.js SDK simplifies Bangladeshi passport extraction. It handles the file buffer and parses both MRZ and visual fields containing bilingual Bangla and English text.

Prerequisite: npm install structocr

const StructOCR = require('structocr');

// 💰 Save 30%+ vs competitors. Get 20 free credits instantly:
// 👉 https://structocr.com/register
// Initialize the client with your API key
const client = new StructOCR('YOUR_API_KEY_HERE');

async function scanBangladeshPassport() {
  // Note: Supports JPG, PNG, WebP (Max 4.5MB)
  const imagePath = './bangladesh_passport_sample.jpg';

  try {
    console.log(`Processing Bangladesh passport: ${imagePath}...`);

    // The SDK handles file reading and the API call seamlessly
    const result = await client.scanPassport(imagePath);

    if (result.success && result.data) {
      const data = result.data;
      console.log('✅ Extraction Successful!');
      
      // Basic Identity (MRZ + VIZ)
      console.log(`Passport #: ${data.passport_number}`);
      console.log(`Name:       ${data.surname} ${data.given_names}`);
      console.log(`Nation:     ${data.nationality} (${data.country_code})`);
      
      // Visual Zone Specifics
      console.log(`Birth Place:${data.place_of_birth}`);
      console.log(`Authority:  ${data.issuing_authority}`);
      
      // Dates
      console.log(`DOB:        ${data.date_of_birth} (${data.sex})`);
      console.log(`Expiry:     ${data.date_of_expiry}`);

    } else {
      console.error('❌ Extraction Failed:', result.error || 'Unknown Error');
    }
  } catch (error) {
    console.error('An unexpected error occurred:', error.message);
  }
}

scanBangladeshPassport();

Sample JSON Output

StructOCR returns a normalized JSON object, automatically managing character encodings and structuring the data extracted from the Bangladeshi passport.

{
  "success": true,
  "data": {
    "type": "passport",
    "country_code": "BGD",
    "nationality": "BGD",
    "passport_number": "AB1234567",
    "surname": "HASAN",
    "given_names": "MOHAMMAD ALI",
    "sex": "M",
    "date_of_birth": "1995-01-15",
    "place_of_birth": "DHAKA",
    "date_of_issue": "2023-08-10",
    "date_of_expiry": "2028-08-09",
    "issuing_authority": "DEPARTMENT OF IMMIGRATION & PASSPORTS"
  }
}