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FluxDown 0.5.0 ships the native GPUI client — a note from the author on why the whole interface was rebuilt.Take a look

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Theme builder

Design a theme, live

Edit every color and metric token and watch a mock of the native desktop client update as you type. Right-click any part of the preview to see which tokens paint it.

Open on a wider screen

The theme builder needs room for the editor and the app preview side by side. Open this page on a desktop browser.

Desktop-compatible schema

Exported JSON follows the client's theme schema (appearance + colors + segmentPalette + metrics), so it imports directly under Settings → Appearance.

Token inspector

Right-click any UI block to inspect its tokens

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