The playground

A scratchpad that runs six languages with no account and no setup - what it saves, what the two shortcuts do, and the ceilings your program runs under.

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The playground is a single file, an editor and a Run button. No account, no project, no setup - it is the fastest way to run something on Revquix, and the right place for "does this actually work?"

Reach it from the command palette with ⌘K.

Six languages#

Java, C++, Python, JavaScript, TypeScript and SQL (SQLite).

Switching language keeps what you wrote in the one you left.

Giving your program input#

The Input panel below the editor is standard input. It sits collapsed as a single row until you put something in it, so it costs no space when you are not using it.

It is not an optional extra: practice problems and interview questions read from stdin almost without exception.

Two shortcuts#

Run⌘ ↵ - Ctrl ↵ on Windows and Linux
Format⌘ S - Ctrl S

Pasted code is formatted for you on the way in.

Your work is kept#

Every keystroke is stored in your browser, per language. Refresh, close the tab, come back tomorrow - it is there.

Signed in, a copy is also kept on your account, which is what carries your work between devices.

On a phone#

The layout is replaced rather than squeezed: the editor goes full width, the output rises as a sheet when a run finishes, the Run bar pins to the bottom, and a row of programming symbols appears above the keyboard - because the characters this is for are two keyboard-switches deep otherwise.

The ceilings#

Same runner the rest of Revquix uses, so the same limits:

  • Your code - up to 64 KB.
  • Input - up to 16 KB.
  • Output - capped. A program that goes past it is stopped, not trimmed, and the result says so rather than handing you a truncated answer that looks complete.
  • Time - a few seconds per run. An infinite loop ends as a timeout.

There is also a daily run allowance, shared with Projects and Practice. Signed out it is smaller, and you may be asked to complete a quick "are you human" check before your first run.

When you need more than one file#

The playground is deliberately one file. A file tree, dependencies between files, tests, AI assist and GitHub push are projects.

Sharing a snippet

Turning what you wrote into a link.

What a project is

When one file stops being enough.

Practice

Code with a judge attached.

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Last checked against the product on . Behaviour changes are listed in the changelog.