Is this tool free to use?

Yes, this tool is completely free to use. No registration, subscription, or payment is required. All processing happens directly in your browser.

Does this tool upload data to a server?

No. All processing happens locally in your browser using JavaScript. Your data never leaves your device, ensuring complete privacy and security. The tool works even when offline.

Does this tool work on mobile devices?

Yes, this tool is fully responsive and works on all modern browsers including Chrome, Safari, Firefox, and Edge on desktop, tablet, and mobile devices.

Is an internet connection required to use this tool?

No internet connection is required after the page loads. Since all processing happens in your browser, you can use this tool offline once the page is loaded.

Is there a file size limit?

There is no server-side file size limit since files are processed locally in your browser. The only limitation is your device's memory (RAM). For very large files, we recommend processing them in smaller chunks.

🌙 CSS Dark Mode Generator

Free online CSS dark mode generator. Visually configure dark mode colors including background, text, links, cards. Real-time preview of dark mode effect. Generates complete CSS with CSS variables and @media prefers-color-scheme. Perfect for frontend developers adding dark mode to websites. Client-side only.

Adjust colors below to preview dark mode in real-time. Copy the generated CSS directly.

Background

Text

Link

Card Background

Border Color

Muted Text

Dark Mode Preview

Dark Mode Sample

Sample text to preview dark mode appearance.

This is a sample link

Card area sample

Generated CSS Code

How to Use the CSS Dark Mode Generator

Generate with the CSS Dark Mode Generator in three easy steps:

Configure Your Preferences
Adjust the settings and options for your css dark mode generator. Choose parameters such as length, complexity, style, or quantity based on your needs.
Click Generate
Click the "Generate" button to create your content. The tool instantly processes your preferences and produces the result right in your browser — no waiting, no server requests.
Copy or Download the Result
Review the generated output and click "Copy" to copy it to your clipboard, or "Download" to save it as a file. You can generate as many times as you need with no limits.

FAQ

什么是prefers-color-scheme？

prefers-color-scheme是CSS媒体查询特性，用于检测用户系统是否设置为浅色或深色模式。语法为：@media (prefers-color-scheme: dark) { ... }。当用户开启系统暗黑模式时，其中的CSS样式会自动生效，实现无缝的主题适配。

CSS变量实现暗黑模式的原理？

使用CSS变量实现暗黑模式的核心思路是：在:root中定义默认（浅色）颜色变量，在@media (prefers-color-scheme: dark)中覆盖为深色值。页面中使用var(--bg-color)引用变量。切换主题只需修改变量值，无需改动每个元素。

如何测试暗黑模式效果？

在Chrome DevTools中按Ctrl+Shift+E（或点击Elements面板右上角的Toggle Rendering），找到Emulate CSS media feature prefers-color-scheme选项，选择dark/light即可模拟。也可以直接在系统设置中切换深色模式。