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Playground / Starter Local editing · No uploads
</> Code editor
index.html1 line
HTML · Line 1, Col 1
Live preview Ready
pxpxFluid
›_ Console 0
Messages from your JavaScript will appear here. Try console.log('Hello!')
Isolated iframe · JavaScript enabled · External resources restricted0 runs

Frontend Playground

Experiment with frontend code in your browser, see live results, read console messages and test common device widths. Save drafts locally or export a ZIP containing index.html, style.css and script.js. No account or server uploads are needed for editing.

How to use the editor

Choose an HTML, CSS or JavaScript tab and start coding. Auto-run refreshes after a brief pause, or press Ctrl/⌘+Enter to run manually. Try mobile and tablet viewport widths, inspect JavaScript errors in the console, then download your work. Imported code is treated as untrusted and runs inside an isolated, network-blocked preview by default.

Keyboard shortcuts & help

Write HTML fragments or full documents. CSS and JS are injected into the preview; local file URLs are not resolved into your project. ZIP reimport accepts uncompressed ZIP files exported by this PixelOkay editor, not general ZIP archives.

Ctrl/⌘ + Enter
Run preview
Ctrl/⌘ + S
Save an editable .json project
Ctrl/⌘ + Shift + S
Download ZIP
Ctrl/⌘ + F
Find in active editor
Ctrl/⌘ + H
Find and replace
Tab / Shift + Tab
Indent / outdent a line or selection
Ctrl/⌘ + 1 / 2 / 3
Switch HTML / CSS / JavaScript tabs

Security note: Preview CSP restricts external resource loads by default, but iframe navigation and outbound network behavior are browser-dependent. Only run code you trust; never paste secrets. Privacy: Projects are saved in browser local storage when space permits. The preview has an opaque origin and cannot read the editor's storage. Network access is blocked by default; enabling it permits preview code to request external resources. This is not a hardened environment for hostile code or a promise that arbitrary JS cannot consume CPU.

Using Frontend Playground

Edit the HTML, CSS and JavaScript panels and run the preview. Review console output, adjust the preview size and keep an editable project backup before exporting standalone HTML or a project ZIP.

This is a native web-code playground, not a framework compiler or a complete untrusted-code isolation platform. External resources require opt-in, preview navigation restrictions vary by browser, and exported HTML contains executable code. ZIP import supports the tool's own uncompressed project format.

Choose an editable web-code project or executable HTML

Practice: a styled heading without external resources

In the HTML panel, enter <h2>Draft preview</h2>. In CSS, enter h2 { color: #1659a5; }. Run the preview with external resources disabled, then save the project before exporting. This is an authored code exercise, not an executed screenshot or test result.

Frontend preview questions

Will this compile a framework project or npm dependencies?

No. This playground runs native HTML, CSS and JavaScript; it is not a framework compiler or package build service.

Does the preview make any pasted code safe?

No. The sandbox and resource policy restrict preview behavior, but do not establish complete isolation for malicious code. Network resources require opt-in, browser navigation restrictions can vary, and exported HTML remains executable. Review code and resource requests yourself.

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