Jutge Web

Solve Jutge.org problems from any browser.
A web-compatible plugin for vscode.dev and github.dev.

_{Unofficial project — not affiliated with, sponsored or endorsed by Jutge.org or the Universitat Politècnica de Catalunya (UPC).}

Why this exists

Jutge.org has an excellent official VS Code extension, but it only runs on desktop VS Code. It depends on Node.js, the local file system and locally installed compilers, none of which exist in the browser, so in vscode.dev it simply isn't available.

That leaves out exactly the situations where a browser editor is most useful: a tablet, a Chromebook, a lab or library computer where you can't install anything, or just a quick exercise away from your own machine.

Jutge Web is a fork of the official extension, rebuilt so that the whole workflow runs in the browser. If you use desktop VS Code, the official extension is the better choice.

What you can do

• Sign in with your Jutge.org account and browse your courses and lists
• Read problem statements next to your code
• Create solution files with the right header and template
• Run the public testcases and your own custom ones, and compare outputs side by side
• Submit to Jutge.org and get the verdict without leaving the editor
• Exam and contest mode is included too, though less tested in the browser

How code runs in the browser

There is no compiler on a tablet, so each language takes a different route:

Programs that loop forever are stopped after a timeout, and VS Code stays responsive. Compiler errors show up as squiggles on the right line, with details in the Jutge.org output panel.

Install

1. Open vscode.dev (or any repository on github.dev).
2. Open the Extensions view and search for Jutge Web.
3. Click Install, then open the Jutge icon in the activity bar and sign in.

Privacy

• Your Jutge.org credentials and submissions go only to Jutge.org, exactly as with the official extension.
• Python runs entirely in your browser.
• For C++ and Haskell testcases, the source code and the testcase input are sent to Compiler Explorer. You can point jutge-vscode.web.compilerExplorerUrl to your own instance.

Limitations

• Graphic problems (turtle, images) can't be tested locally in the browser. Submit them to Jutge.org.
• Exam PDFs are saved into your workspace. Download them from the Explorer to read them.
• Compiler Explorer returns output line by line, so a missing final newline can't be detected locally.

Settings

The extension also works on desktop VS Code, where it behaves like the official one and uses your local compilers.

Credits and license

Built by Alexander de Toro Todorov (inverso.bio) with the help of Claude Code.

Based on the official Jutge.org VS Code extension by Alex Serrano, Pau Fernández, Joaquín Millán Aldaz and Jordi Petit, © Universitat Politècnica de Catalunya – BarcelonaTech (UPC).

Licensed under the Apache License 2.0. See NOTICE for the list of changes. "Jutge.org" is used only to describe compatibility with that service.

Found a bug? Open an issue.

git clone https://github.com/detorotodorov-alexander/jutge-vscode-online.git
cd jutge-vscode-online
npm install
npm run compile                                            # builds desktop + web bundles into dist/
npx @vscode/test-web --extensionDevelopmentPath=. .        # try the web build locally
npx @vscode/vsce package                                   # create a .vsix