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
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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Need this work to keep going?
Matrix gives agents a private cloud computer for files, connected tools, and work that continues after you close your laptop. The browser tool above is free; a Matrix computer requires a paid plan.