Codeground AI

TypeScript Online Compiler

Write TS, tsc runs first, then Node. Type errors show before runtime. No npm for basic snippets.

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AI Agentcodeground-coder

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It will inspect your code, think, and propose changes you can Keep or Discard inline.

  • Explain what this code does
  • Refactor this file for readability
  • Add input validation and error handling
  • Switch playground & scaffold Node.js
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Typescript

About this editor

Write TS, tsc runs first, then Node. Type errors show before runtime. No npm for basic snippets.

Learn generics, utility types, and strict null checks with tsc diagnostics before Node executes anything. Handy for interview type puzzles, converting JS to TS mentally, and validating a single-file module without npx tsc locally. Share a saved link when you want others to see the same TypeScript playground.

Key features

TypeScript runs server-side

tsc type-checks, then Node runs the output — same order as many small TS projects.

One-click Run

Output, stderr, and compiler errors land in the panel below. No local install.

VS Code–like editor

Syntax highlighting, bracket matching, and shortcuts that feel familiar if you use VS Code.

Shareable links

Save with a title and copy the URL — handy for reviews, homework, or interview screens.

No setup

Open the page and start typing. Account optional for basic runs.

Room to grow

Need multiple files? Open a cloud workspace from the top bar.

Getting started

  1. 1
    Write your code

    Type or paste TypeScript in the editor. A starter template is there if you want to run something immediately.

  2. 2
    Press Run

    Check the output panel underneath for results or errors.

  3. 3
    Edit and rerun

    Change a line, run again. Most people loop here until the output looks right.

  4. 4
    Save for a permalink

    Add a title when you save. You get a link you can send to a teammate or drop in a doc.

  5. 5
    Bigger project?

    Cloud workspaces handle multi-file repos and longer sessions. Link is in the top nav.

Common questions

Is this TypeScript compiler free?

Yes. No payment and no account required for a quick run. Sign in if you want saves tied to your profile.

Do I need to install anything?

No. Code runs on Codeground servers in a sandbox. Just open the page.

What TypeScript version runs here?

tsc + Node in a sandbox. Use the JavaScript ground for plain .js.

Can I share my code?

Save with a title to get a permalink, or share the playground URL as-is.

Works for interviews?

Yes. Share a ground link, or use interview mode for a live shared editor.

Multiple files?

This page is for single-file snippets. Use a cloud workspace for full projects.

Will my code still be here tomorrow?

Anonymous sessions can reset. Save with a title (and sign in) for a stable link.

Why use this instead of installing locally?

Good for quick tests, learning, and sharing a snippet. For large offline work, a local IDE still wins.

Is this an online TypeScript IDE or playground?

A browser playground with syntax highlighting and one-click Run — run TypeScript online without a full local install. Cloud workspaces cover multi-file projects.

Type errors before run?

Yes. tsc goes first; errors appear in the output panel before execution.

Is there a free TypeScript playground?

Yes. Type-check and run TypeScript online for free—no Node or tsc install on your machine.

Is this a TypeScript online IDE?

Browser TS IDE with tsc and Run. For tsconfig projects and many files, use a cloud workspace.

Can I run TypeScript online without installing Node?

Yes. tsc and Node run on Codeground servers. You only need a browser to use this online TypeScript compiler.