TS Viewer

TS Viewer provides an end-to-end view of TypeScript code behavior by exposing static type information, AST fragments, and transpilation expectations. It targets developers who want rapid feedback without configuring a build tool or IDE. Users paste a code snippet, select a TypeScript version and a JavaScript target, then run analysis to obtain structured outputs such as inferred types, node-level syntax trees, and emit previews. The tool supports learning, onboarding, debugging, and peer reviews by making internal decisions observable and reproducible.\n\nConceptually, the tool parses the code with the TypeScript compiler API, builds an AST, runs type checking, and emits JavaScript for the chosen target. Outputs include a human readable type summary, a machine readable AST in JSON, and a usable JS snippet for quick verification. Advanced users can export the AST, inspect diagnostics, and measure analysis latency to optimize workflows.\n\nAudience and differentiators: teams onboarding TypeScript, educators teaching type flow, and code reviewers needing reproducible insights will benefit. The unique value comes from combining type visibility, structural AST view, and transpile results in a single lightweight tool that runs in a browser. Typical use cases include code understanding, interview prep, and rapid prototyping without server dependencies.