Website builder that supports a dark mode version of the site

If you mean a visitor-facing light/dark toggle, Framer is a good fit: it supports dark color styles, and you can add a toggle component so visitors can switch themes. (framer.com)

Other options:

• 10Web — says its AI Website Builder includes built-in dark/light switching for sites. (10web.io)
• Webflow — can support a toggle, often via a template or custom setup; check that the specific template includes it. (dashkit-template.webflow.io)
• WordPress.com — some themes include dark styles, and dark mode can also be added with a plugin or custom setup. (wordpress.com)

Quick pick: Framer for a design-focused site; 10Web if you want the builder to provide the switch more directly. Note that a builder’s own dark interface isn’t the same as dark mode on the published site—Webflow, for example, distinguishes between the two. (help.webflow.com)

Here are the main options, depending on whether you want a built-in toggle or are willing to add one.

Best native support: Framer
Framer lets you define color tokens and switch the whole design between modes with one toggle, which makes it the cleanest option for a light/dark version of a site (Framer lets you define color tokens and switch the entire design between modes with one toggle.). Its dark-mode design is a built-in feature rather than an add-on.

Most flexible: WordPress
WordPress handles dark mode through themes or plugins. Some themes are designed dark from the start, such as Dorya, which includes per-element dark mode customization. Blocksy offers a dark mode toggle in its Pro version. For a switch, the WP Dark Mode plugin works with Gutenberg, Elementor, Divi, and other page builders. It has been updated recently, with a dedicated Divi element added in August 2026 (per its changelog). Keep in mind that poorly built dark mode plugins can slow a site down, so check performance after installing one.

Squarespace: workable, but not built in
Squarespace has no built-in dark mode toggle. You can still design your site with one of three approaches: a permanent dark theme, a toggle option, or an automatic system-based mode. A free route is to paste toggle code into Code Injection, which requires a plan that includes it. Alternatively, a paid plugin ($25 for one site, per the vendor) adds a sun-and-moon switch to your navigation.

Wix: limited
Wix does not offer native dark mode for sites. Its support page says dark mode is not supported on the Wix platform (i.e. in your site's dashboard, account pages, and in the site builders). This refers to the builder itself, and visitor-facing dark mode can still be added through a third-party app, such as the Dark and Light Mode Wix app, which places a toggle button wherever you choose on the site. Be aware that this support page may not be current, so check Wix's latest documentation.

Recommendation

• Want a real dark version with a visitor toggle and minimal setup: Framer.
• Want maximum control and a large ecosystem: WordPress with a dark-ready theme plus a toggle plugin.
• Already on Squarespace or Wix: add a toggle through a plugin or app rather than switching platforms.

If you tell me your budget, technical comfort level, and whether you need e-commerce or a blog, I can narrow this down.

Most major website builders do not have a "one-click" native dark mode toggle that automatically transforms your entire site for users. Instead, they typically require you to either build a site with a fixed dark theme or implement a toggle system using built-in design tools, apps, or custom code.

Here is how you can approach dark mode with popular website builders:

1. Understanding "Dark Mode" vs. "Dark Theme"

• Dark Theme (Fixed): You design your site with dark backgrounds and light text as the default. This is the easiest to implement and is supported by every website builder (Wix, Squarespace, Webflow, etc.).
• Dark Mode (Switchable): A true dark mode allows your visitors to toggle between light and dark versions. This requires more effort, as you are essentially creating two color palettes and a mechanism to swap them.

2. Website Builder Capabilities

Wix

• No Native Native Toggle: Wix does not have a built-in "turn on dark mode" button for your site visitors.
• App Market: You can use third-party apps from the Wix App Market (such as "Dark and Light Mode") that allow you to add a toggle button to your site. These apps typically handle the color inversion for you.

Webflow

• Flexible Design: Webflow is the most powerful option for this, though it is not "automatic". You can create a dark mode switch by defining color variables (e.g., using CSS variables) and using Webflow’s Interactions tool to trigger a class change (e.g., adding a .dark-mode class to the body) when a button is clicked.
• Note: While Webflow recently added light/dark themes to its own dashboard interface, this does not automatically apply to the sites you publish.

Squarespace

• Design-Led Approach: Squarespace relies on its site styles. You can manually design a dark-themed site by choosing dark background colors for your sections. Implementing a user-facing toggle often requires injecting custom JavaScript and CSS, as there is no native toggle feature.

3. Recommended Approach for Implementation

If you want to offer a true toggle for your users, follow these best practices:

• Define Color Variables: Don't hardcode colors. Use a color system (like CSS variables) so that when the "Dark Mode" class is active, all your primary, secondary, and text colors update simultaneously.
• Design Systematically: Do not simply invert colors. Pure black (#000000) can be harsh; use deep grays (#121212 or #1C1C1E) for a more professional look, and ensure your text contrast meets accessibility (WCAG) standards.
• Use Apps if You Aren't a Developer: If you are using a platform like Wix, using an existing plugin is the most reliable way to ensure the dark mode works across all your pages without needing to write custom code.

Summary: If you want a site that looks like it has dark mode, simply design a Dark Theme from the start. If you want your users to be able to choose their view, you will need to use an app (on platforms like Wix) or custom variables and interactions (on platforms like Webflow).

Webflow is a strong option if you want a polished site with both light and dark versions. It supports color-variable modes, and you can start from a light/dark toggle template; the visitor-facing switch may require some setup or a small script. ¹

Other options:

• WordPress with Beaver Builder — supports a light/dark toggle, including following the visitor’s device preference and saving their selection. ²
• Wix — you can add a dark/light toggle through an App Market app. ³

If you mean a dark design only, rather than a switch visitors can use, most builders can do that with theme styling. My quick pick: Webflow for design control; WordPress for a more guided toggle setup.

Sources: ¹ Webflow’s dark-mode guidance · ² Beaver Builder dark-mode toggle · ³ Wix Dark and Light Mode app