Mainframe Modernization

COBOL to Cloud-Native Java

The first agentic AI service purpose-built for modernizing mainframe workloads. Millions of lines refactored in minutes, not months.

Minutes
vs months for conversion
Free
Agent cost
3
Modernization patterns
01

Three Modernization Patterns

Choose the path that fits your risk tolerance and timeline. AWS Transform supports all three — from line-by-line conversion to full architectural reimagination.

Lowest Risk

Refactor

Line-by-line COBOL to Java conversion. Same business logic, modern language. Preserves exact behavior while unlocking modern tooling and talent pools.

InputCOBOL, JCL, DB2, Batch
OutputJava Spring Boot
Fidelity1:1 logic preservation
Most Ambitious

Reimagine

Analyze business intent, generate an ATX Spec, then produce entirely new cloud-native code. Modern architecture from the ground up — microservices, event-driven, serverless.

InputMainframe application
OutputCloud-native architecture
FidelityBusiness intent preserved
Fastest Path

Replatform

Lift the workload to a managed runtime with minimal code changes. Get off the mainframe quickly while planning deeper modernization later.

InputMainframe workload
OutputManaged AWS runtime
FidelityMinimal changes
02

End-to-End Pipeline

From initial analysis to deployed cloud application — the agent automates every step. Click each phase to explore.

Code Analysis
Activity Analysis
Data Analysis
Decomposition
Wave Planning
Code Conversion
Testing
Deployment

Code Analysis

The agent scans your entire mainframe codebase — COBOL programs, copybooks, JCL, DB2 stored procedures. It builds a dependency graph and identifies business domains, dead code, and complexity hotspots.

03

Language Transformations

Every layer of the mainframe stack has a modern cloud-native equivalent. The agent handles the full conversion.

COBOL PL/I Assembler
→
Java Spring Boot
Business logic conversion with full test generation
DB2 VSAM
→
Amazon RDS DynamoDB
Data layer migration with schema transformation
JCL Batch
→
Step Functions Lambda
Job scheduling to cloud-native orchestration
CICS IMS
→
API Gateway ECS/EKS
Transaction processing to microservices
04

Refactor vs Reimagine

Two paths converge on the same outcome — modernized, tested, deployed. The difference is how much architectural freedom you want.

Refactor Same logic, modern language
COBOL Source
→
AWS Transform Agent
→
Java Spring Boot
OR
Reimagine Business intent, new architecture
COBOL Source
→
ATX Spec
→
Kiro Generation
→
Cloud-Native App
↓
Modernized Application  •  Automated Testing  •  AWS Deployment
Composability: Both paths incorporate enterprise context — partner best practices, knowledge bases, coding guidelines, and design documents. The agent doesn't work in a vacuum.