These environments provide isolated, reproducible spaces to execute code, debug logic, and test integrations without risking your local machine. When selecting a tool, prioritize the speed of environment provisioning, the depth of supported language runtimes, and whether the interface offers the collaborative features required for your specific workflow. Look for platforms that mirror production environments closely to ensure that your experiments remain functional when migrated to a live server.

Sandbox claude code, codex, or any TUI on macOS

The safest, simplest way to run untrusted code.