Welcome
Important
AWS Mainframe Modernization Service (Managed Runtime Environment experience) will no longer be open to new customers starting on November 7, 2025. If you would like to use the service, please sign up prior to November 7, 2025. For capabilities similar to AWS Mainframe Modernization Service (Managed Runtime Environment experience) explore AWS Mainframe Modernization Service (Self-Managed Experience). Existing customers can continue to use the service as normal. For more information, see AWS Mainframe Modernization availability change.
AWS Mainframe Modernization provides tools and resources to help you plan and implement migration and modernization from mainframes to AWS managed runtime environments. It provides tools for analyzing existing mainframe applications, developing or updating mainframe applications using COBOL or PL/I, and implementing an automated pipeline for continuous integration and continuous delivery (CI/CD) of the applications.
This document was last published on October 21, 2025.
