DEVELOPER TOOLS / CODE PLAYGROUND

Online Code Compiler

Write, run, experiment and improve. A focused workspace for creative projects, algorithm practice, and browser-first coding.

AI learning coachMulti-file workspaceChallenge practiceReal test casesCheckpoints

PIXELOKAY / WORKSPACE IN-BROWSER

Ready

Quick structural checks · runtime errors · not a full linter

main.jsLn 1, Col 1Tab indent · Shift+Tab outdent · Ctrl/⌘+F find · Ctrl/⌘+Shift+P commands

AI Coding CoachUnderstand · practice · debug · improve

Get coding help in 3 steps

Choose an AI engine, download or connect its model, then ask about your code. You stay in control of every edit.

1Choose where AI runs

AI engine

On-device coding model

First use needs a large download and compatible GPU memory. Later sessions can reuse cached assets where the browser retains them.

Checking AI support…

A local model must be downloaded or loaded before AI can start.

2Set up the model

Download and load an on-device model to begin. Your code is not sent during model download.

Model storage & recovery

AI failed to load? Start with non-destructive checks. Your editor and projects still work without AI.

Website storage usedNot checked

Browser's quota estimateNot checked

Browser storage is shared with other PixelOkay tools on the same origin. The estimates cannot guarantee model space.

Selected WebGPU model

Choose WebGPU to inspect or remove its model cache.

Cache not inspected. Inspection may load the small WebLLM runtime, but does not download model weights.

Before removing a cached model: export important projects, close other PixelOkay AI tabs, and confirm the model name. You may need to download it again. Only the selected model's tensor/tokenizer cache is targeted; other tabs or tools may still depend on those files. No general site data is automatically cleared.

Recognized coding-model downloads

Scan the two WebLLM coding models this compiler knows. This cannot see every PixelOkay AI model, every storage backend, or unfinished downloads. It does not scan or delete other tools' unrelated data.

Not scanned. No cache files will be removed without confirmation.

Removal requires typing confirmation, affects other tabs sharing these models, and may require large redownloads. It targets only verified model entries through WebLLM—not general website storage, other apps, or unknown model caches.

No recovery operation running.

Advanced browser recovery · data-loss warning

Last resort: clearing this website's data can permanently erase locally saved editor projects, checkpoints, history, preferences, chats and cached models across PixelOkay. This tool will not do that for you.

Export your project JSON/ZIP first. Check device disk space, restart or update your browser, then review this website's storage in browser settings. Only clear website data yourself after reviewing what may be lost. Chrome/Edge: Settings → Privacy & security → Site settings → View permissions and data stored across sites (menu names vary by version).

3Get help with your code

How detailed should the explanation be? Type of help Your question or extra instructions

The active file is shared with this model. Select code in the editor to focus AI on that region.

Preview exactly what AI receives

Remote prompts attempt to redact recognizable credentials; review every request before sending.

Prompt sent to AI

The prompt uses the active file or selection, and optionally actual console output. Local models run on this device; remote requests require permission.

Set up a model to start.

Your AI answer

Your answer will appear here. AI never edits code until you review and approve.

AI answers can be wrong, especially on smaller local models. You are responsible for reviewing, testing and verifying proposed code.

Console outputReady to run

Standard input (stdin)

JavaScript: use input and console.log().

Run your code to see output here.

JavaScript and HTML execute locally. Python loads WebAssembly on demand. Other languages are source-editable only.

No program run yet.

◇ Code execution stays in your browser. Sharing and optional external AI requests are separate opt-in actions.Local editing · No account required

ONE WORKSPACE · MANY WAYS TO LEARN

From your first line to your next challenge.

A browser-only code editor, practice trainer, and local workspace—designed to make the next step easy.

Write something

Start from a language template, create files, search across project code, and make local checkpoints before significant edits.

Run & debug with AI

Run enabled languages in an isolated browser Worker or preview, then review diagnostics and optionally ask an AI model for suggestions. AI never auto-runs code.

Practice & share

Try input/output challenges, run example tests, review results, save local snapshots or export a project ZIP.

Execution limits: This is not a secure hosted judge. JavaScript uses a disposable browser Worker; Python downloads WebAssembly assets on demand. C, C++, Java, PHP, Go and Rust are editable but cannot yet execute in this build. The iframe/Worker isolation is not equivalent to an operating-system security sandbox. HTML preview scripts run in the browser main thread and may freeze the tab if they never finish; closing a preview cannot reliably interrupt a busy main-thread script. Local sharing links are size-limited and include project source in the URL. Do not store secrets in code or share links.

Using Online Code Compiler

Edit a multi-file practice project and run browser JavaScript or HTML previews, with optional Python or configured remote compilation paths. Keep educational browser execution distinct from a secure server-side build environment.

Create or import a project and choose JavaScript, HTML/CSS, or another supported editor mode; inspect the execution settings before running.

Run the educational JavaScript/HTML preview locally. For Python, explicitly request the Pyodide runtime; for compiled languages, configure and consent to a remote endpoint before sending code or input.

Review output and tests, then save a JSON/ZIP backup. Inspect optional AI suggestions before deciding whether to use them.

Example: Create a small JavaScript exercise, run it in the browser preview, inspect the output and practice-test results, then save a project backup before trying the optional Python runtime.

Limits and privacy: The browser preview is educational and is not a secure server-side judge. Python setup downloads Pyodide runtime files from an external CDN; configured remote compilers can receive submitted source and standard input. Other compiled-language toolchains are not bundled or claimed working. Optional AI/runtime providers depend on browser support and configuration; imported projects and suggestions are not run automatically.

Frequently asked questions

Is this a secure online judge for untrusted code?

No. Browser execution is intended for educational practice and is not a secure server-side judging environment.

What is sent when I choose a remote compiler?

The configured remote service may receive the source and standard input needed for compilation. Review the provider and its terms before enabling that path; local browser previews do not use that remote compiler.

Online Code Compiler

From your first line to your next challenge.

Write something

Run & debug with AI

Practice & share

Delete recognized AI model downloads?

Local checkpoints

Command palette

Actual browser runtime support

Using Online Code Compiler

Frequently asked questions

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