tsx

Judgement

What it is

Developer tool

What it does

A command that runs TypeScript files directly in Node.js using esbuild, with watch mode and support for both ESM and CommonJS.

Adopt it when

You want to run TypeScript scripts or a dev server in Node.js without a separate compile step or config.

Watch out

It strips types without checking them, so you still need tsc for type errors, and it is largely one maintainer's work.

Ready for

Production-ready

Runs as

Command line

Built with

TypeScript and esbuild

How established

Established: started 4 years ago, latest release v4.23.15.

What the license allows

You can build it into a product you sell, as long as you keep its copyright notice.

Judged on 2026-11-06 from the project's README and GitHub data. The license and age lines are worked out directly.

Built from

Follow it down: tsx → TypeScript → Go → runs on a microchip

How compilers were built, back to punched paper tape

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