Developer tool

JavaScript and TypeScript Workspace

Run short JavaScript or TypeScript snippets in a timed, isolated browser sandbox and inspect console output.

Free browser tool

No Matrix computer needed

✓ No account or card

✓ Use the result right away

✓ Task-specific limits below

Workspace

Use javascript and typescript workspace

Runs in this browser tab

LanguageCode

Single-file code only. Imports and network access are blocked. TypeScript types are removed without full type checking.

Console output

Logs and returned values appear here. Each run gets a fresh isolated worker and a 3-second limit.

How to use it

Write a short snippet, then run it in a disposable isolated environment to inspect the result.

What to check

Imports, network requests, long-running code, and access to Matrix data are blocked. Review untrusted code before running it.

Review the result before using it in a published page, application, or agent configuration.

Quick answers

Frequently asked questions

Can code in the workspace access Matrix data?

No. Snippets run in a disposable isolated browser environment with network access blocked and a short execution timeout.

Does the TypeScript workspace type-check a project?

No. It transpiles a bounded single snippet for execution. Imports and exports are unsupported, and full project type checking is outside this tool.

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Utilities brings everyday text, file, and developer tools into Matrix. Some advanced browser tools remain on the website. The desktop client connects to your private Matrix cloud computer, which requires a paid plan.

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