A quick sandbox for HTML and CSS
Write markup on one side, styles on the other, and see the result update instantly — no build step, no server round trip. It's a good place to prototype a component, debug a layout, or test a CSS snippet before dropping it into a real project.
Your code autosaves to this browser as you type, and the preview runs in a sandboxed frame with scripts disabled, so it's safe to experiment freely.
Frequently asked questions
Where is my code saved?
In your browser's local storage, on your device. It autosaves as you type — but it's tied to this browser, so download the HTML file for anything important.
Does the preview run JavaScript?
No. The preview renders in a fully sandboxed frame with scripts disabled, so it's safe to paste in HTML and CSS from anywhere without it running code against your browser.
Can I download my work?
Yes — download a single self-contained HTML file with your CSS inlined, or copy just the CSS to paste into another project.
Is anything uploaded to a server?
No. The editor, live preview, and autosave all run entirely in your browser.