TS Helper is a Chrome extension developed by NoneGame. It is a free tool that aims to simplify the process of writing TypeScript type declarations, specifically when describing the content returned by REST-API.

With TS Helper, users can easily convert a JSON object into a TypeScript interface definition. The extension provides a convenient way to generate the necessary type declarations by simply selecting the JSON object text and right-clicking. From the context menu, users can choose the "Copy as TS interface" option.

This feature saves developers a significant amount of time, especially when dealing with complex JSON structures. By automating the process, TS Helper eliminates the need for manual declaration and reduces the chances of errors or inconsistencies in the type definitions.

TS Helper is a valuable tool for TypeScript developers who frequently work with REST-APIs and need to convert JSON objects into TypeScript interfaces efficiently.