Code playground
Local HTML/CSS/JS iframe sandbox (no remote share)
Interactive controls load with JavaScript. Processing stays in your browser.
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How to use
- 在选项区分别填写 HTML、CSS、JavaScript。
- 点击处理后在下方 iframe 预览（sandbox，无外链脚本）。
- 可复制完整 HTML 文档；无远程保存或分享。
- 不要粘贴不可信的第三方脚本。
FAQ
Does Code playground upload my data?
No. Code playground runs locally in your browser and does not upload content to www.518882.com or third-party APIs.
Do I need an account?
No. Open and use — no signup, login, or paywall. Open Code playground and use it — no signup, login, or paywall.
How is this different from upload-based tools?
Tools run locally in your browser; content is not sent to our servers for processing — suited to private text and drafts.
Are there limits?
Limited by device memory and the browser; very large inputs may slow the page. There is no account quota.