trace

Debug together, live.

Paste code, share the room code, and watch it run with your team. Everyone sees the same steps, the same variables, the same moment it breaks. Python and JavaScript, in the browser.

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How it works

  1. 1

    Create a room

    One click gives you a room code. No accounts, no setup.

  2. 2

    Write code together

    Everyone edits the same file live, with each person's cursor visible.

  3. 3

    Run it and inspect

    Anyone runs the shared code; the whole room gets the trace and scrubs through it.

Trace runs on free-tier hosting. If the server is asleep, the first run can take half a minute while it wakes up.