bit BlazorUI is an open-source suite of 100+ native components that render unchanged under WebAssembly, Server, Hybrid (MAUI) and pre-rendering - and re-skin to your brand from a single color.
dotnet add package Bit.BlazorUIPick one to see it running, and the markup it took to get there.
<BitColorPicker ShowPreview ShowAlphaSlider
@bind-Alpha="Alpha"
@bind-Color="Color" />
@code {
private double Alpha = 1;
private string Color = "rgb(0,101,239)";
}Six things that are difficult to retrofit into a component library, and are therefore worth checking before you commit to one.
Every component is written in C#, with no JavaScript framework underneath - which is why the same code renders under WASM, Server, Hybrid and static pre-rendering without changing.
Five components add about 50 KB to an app; forty add about 200 KB in total - dll, css and js together. You pay for what you use and nothing else.
A single brand color fed to the theme factory produces complete light and dark palettes, and four design-system presets - Fluent, Fluent 2, Material and Cupertino - ship in the box.
Right-to-left is a first-class direction on every component rather than a stylesheet added afterwards, which makes this a solid base for a genuinely multilingual application.
The official MCP server lets Copilot, Cursor, Claude and Windsurf discover components, pull accurate examples, and follow the library's conventions without being told twice.
A professional team builds these components in the open, on the same repository you can file an issue on - which is what keeps the release cadence and the support predictable.
Every component reads its color, shape, size, type and motion from CSS variables, so a theme is data rather than a stylesheet fork. Hand the theme factory a brand color and it derives complete light and dark palettes with the contrast already checked - or pick one of the four design systems that ship in the box.
The switcher in the header above re-skins this entire site live. Nothing on this page is a screenshot.
await themeManager.ApplyTheme(
BitThemeFactory.CreateFromColor("#8b5cf6"));:root[bit-theme="my-brand"] {
--bit-clr-pri: #8b5cf6;
--bit-shp-radius-surface: 12px;
--bit-tpg-font-family: "Inter", sans-serif;
}Point your coding agent - GitHub Copilot, Cursor, Claude, Windsurf - at the official bit BlazorUI MCP server and it discovers components, pulls accurate usage examples, and follows the library's conventions without being told twice.
{
"mcpServers": {
"bitBlazorUI": {
"type": "http",
"url": "https://blazorui-ai.bitplatform.dev/mcp"
}
}
}Everything an application UI is made of - and a few things it usually is not, like a pure-C# PDF viewer, a native charting component and a full scheduler.
Free and open source, backed by a dedicated development team and an active community. Every component lives on GitHub, so you can follow how it is built, report a bug, fork it, or send a pull request.