AWS released an open-source tool called Blocks that lets AI coding assistants build complete app backends instantly without needing to set up complex cloud infrastructure.
On June 16, 2026, Amazon Web Services launched a free, open-source tool named AWS Blocks. The tool is built specifically for the way software is made today: where AI assistants like Cursor or Claude Code write most of the code. It acts like a set of guardrails, forcing AI tools to write perfect app structures without making mistakes.
With Blocks, a developer or an AI can quickly piece together an app using plug-and-play parts for databases, user logins, and file storage. The best part is that everything runs instantly on the developer’s local computer. You do not even need an AWS cloud account to build and test your app.
When you are ready to launch, the tool automatically turns that local code into real cloud services like Amazon DynamoDB or Lambda. The framework is completely free, meaning companies only pay for the actual cloud storage and power their live apps use.
