Our open-source manifesto

Write 70% less code with human-readable, machine-writable syntax.

Build semantic layouts with Row, Column and Grid. Add 100+ pre-styled, open-source components. Manage themes and styles in a single file.
<TiltFx>
  <Card fillWidth direction="column" padding="4" radius="l" border="neutral-alpha-weak" background="transparent">
    <Row fillWidth vertical="center" paddingX="20" paddingY="12" gap="12">
      <Avatar size="xs" src="/avatar.jpg"/>
      <Text variant="label-default-s">
        Lorant One
      </Text>
    </Row>
    <Media
      border="neutral-alpha-weak"
      sizes="400px"
      fillWidth
      aspectRatio="16 / 9"
      radius="l"
      src="/cover.jpg"
    />
    <Column fillWidth paddingX="24" paddingTop="32" paddingBottom="20" gap="12">
      <Heading as="h2" variant="body-default-xl">
        Your AI hallucinates. Let Once UI fix it.
      </Heading>
      <Text onBackground="neutral-weak" wrap="balance">
        Coding agents are only as strong as their context window. Don't fill it up with obscure spaghetti code.
      </Text>
      <Row gap="8" paddingTop="8">
        <Button variant="tertiary" weight="default" size="s" prefixIcon="heart">
          1.4k
        </Button>
        <Button variant="tertiary" weight="default" size="s" prefixIcon="chat">
          256
        </Button>
      </Row>
    </Column>
  </Card>
</TiltFx>
Build once. Reuse infinitely.
Lorant One
Proxima b

Your AI hallucinates. Let Once UI fix it.

Coding agents are only as strong as their context window. Don't fill it up with obscure spaghetti code.
1.4k
256
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Revenue growthJanuary, 2025
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42%
Monthly target$27,000

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PageCustomize page theme
Theme
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ColorCustomize color schemes
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Accent
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Solid styleCustomize the appearance of interactive elements
Style
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AdvancedCustomize advanced styling options
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styles.neutral="slate"
[i @once-ui-system/core@latest]
<Column horizontal="center">

Copy and paste. Insert from 100+ open-source, pre-styled components with minimal syntax.

Contexts. App-level state management for themes, toasts, icons and layouts.
Basics. Wrappers and utilities to make complex functionality approachable.
Form controls. Interactive elements for forms and data entry.
Static elements. Feedbacks, badges, tags, skeletons and more.
Data visualization. Responsive, interactive charts and gauges.
Modules. High functionality, minimal syntax: megamenu, command palette, code block.
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Wind: 8 km/h
Listening...
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Temperature:
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72%
Wind:
8 km/h
Pressure:
1013 hPa
Visibility:
10 km
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UV Index:
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