Legacy Code Modernization Tool

Automated transformation from monolithic architecture to scalable microservices

📂 Upload Source Code

Drop your legacy files here — Bob's AI will analyse and plan the modernization

.py .js .ts .java .php .rb .go + more

🗂️

Drag & drop your source files here

Supports .py, .js, .ts, .java, .php, .rb, .go, .cs, .cpp, .txt and more

🤖 Bob AI — Modernization Analysis

✓ Complete

Project Status

✓ Code Analysis

✓ Refactoring

✓ API Generation

✓ Tests Created

✓ Documentation

Microservices Generated

10x

Code Structure Improvement

80%+

Test Coverage

Modernization Steps

Microservices Architecture

API Gateway
Port 8000

↓

User Service
Port 8001

Product Service
Port 8002

Order Service
Port 8003

Payment Service
Port 8004

Reporting Service
Port 8005

❌ Before: Legacy Code

Single monolithic file (145 lines)
Global variables everywhere
Tightly coupled logic
MD5 password hashing (weak)
No separation of concerns
Zero test coverage
No documentation
Poor scalability

# Global state - BAD!
db_connection = None
current_user = None

class LegacyApp:
    def register_user(self, username, password):
        global db_connection
        # Weak MD5 hashing
        hashed = hashlib.md5(password.encode())
        # Everything mixed together...

✅ After: Modern Architecture

5 independent microservices
Dependency injection pattern
Loosely coupled architecture
Bcrypt password hashing (strong)
Clear separation of concerns
Comprehensive test suite (80%+)
Full documentation
Horizontally scalable

# Clean, modern FastAPI
from fastapi import FastAPI, Depends
from passlib.context import CryptContext

@app.post("/register")
def register_user(user: UserCreate, 
                  db: Session = Depends(get_db)):
    # Strong bcrypt hashing
    hashed = pwd_context.hash(user.password)
    # Clean, testable, focused

10-Step Modernization Roadmap

Step 1: Database Layer Separation

Priority: High Effort: Medium

Extract database operations into a separate data access layer using SQLAlchemy ORM for better maintainability and testability.

Step 2: Remove Global State

Priority: High Effort: Medium

Eliminate global variables and implement dependency injection for better code organization and testing.

Step 3: Extract User Service

Priority: High Effort: High

Create independent UserService microservice with authentication, authorization, and user management.

Step 4: Extract Product Service

Priority: High Effort: Medium

Create ProductService microservice for catalog management and inventory tracking.

Step 5: Extract Order Service

Priority: Medium Effort: High

Create OrderService microservice with proper dependencies on User and Product services.

Steps 6-10: Complete Infrastructure

Priority: Medium-Low Effort: Medium

Payment Service, Reporting Service, API Gateway setup, comprehensive documentation, and testing infrastructure.

🚀 Generated Services

User Service - Authentication & user management
Product Service - Catalog & inventory
Order Service - Order processing
Payment Service - Payment handling
Reporting Service - Analytics & reports
API Gateway - Request routing & monitoring

🔒 Security Improvements

MD5 → Bcrypt password hashing
Input validation with Pydantic
SQL injection prevention via ORM
CORS configuration
Proper error handling
Health check endpoints

🧪 Testing Suite

Unit tests for each service
Pytest configuration
Test fixtures and mocks
80%+ code coverage
Integration test examples
Automated health checks

📚 Documentation

Complete README with setup
Modernization roadmap
Dependency maps with diagrams
Architecture documentation
Complete API reference
Quick start guide

⚡ Key Benefits

Independent service scaling
Easier maintenance & updates
Fault isolation & resilience
Technology flexibility
Team autonomy
Faster deployment cycles

🛠️ Technologies

FastAPI - Modern web framework
SQLAlchemy - Powerful ORM
Pydantic - Data validation
Pytest - Testing framework
Bcrypt - Password hashing
Uvicorn - ASGI server

Ready to Modernize Your Legacy Code?

Transform your monolithic applications into scalable microservices with our automated tool

▶ Run Demo 📖 Documentation ⚡ Quick Start