TypeBench
The TypeScript playground — and a JavaScript one too.
TypeBench is a browser-based playground for TypeScript and JavaScript. Open the site, write some code, and see the result in a split-screen view — no project to scaffold, no config to fiddle with, nothing to install. It is built for the moment you just want to try something: check how an API behaves, confirm what a snippet returns, or work through a typing problem without leaving the tab.
Because it runs entirely in the browser, the loop from idea to output is instant. And because every playground has its own URL, sharing a working example is as simple as copying a link — handy for bug reports, code review, teaching, or answering "can you show me?" in a chat.
It is free to use, supports pulling in npm packages, and understands the major frontend frameworks, so it scales from a one-line experiment up to a small reproducible component.
Highlights
Zero setup
No install, no config, no boilerplate. Open the page and start typing — TypeScript and JavaScript both run out of the box.
Split-screen results
Code on one side, output on the other. See what your snippet returns the moment you run it.
npm imports
Pull in packages straight from npm, so you can test real libraries instead of toy examples.
Framework-aware
Understands React, Vue, and Angular — good for isolating a component or reproducing a framework quirk.
Share by URL
Every playground has its own link. Share a reproducible example for bug reports, reviews, or teaching.
Free
No account required to start. Just open it and go.
Try TypeBench
Online TypeScript & JavaScript playground.
