# Customization

::::card-grid
:::card{title="Using a Custom Theme" href="/guides/customization-custom-theme"}
Create and use a custom theme in VitePress to fully control the look and feel of your site.
:::

:::card{title="Extending the Default Theme" href="/guides/customization-extending-default-theme"}
Customize and extend the VitePress default theme with custom CSS, components, layouts, and slots.
:::

:::card{title="Build-Time Data Loading" href="/guides/customization-data-loading"}
Load arbitrary data at build time using VitePress data loaders and import it from pages or components.
:::

:::card{title="SSR Compatibility" href="/guides/customization-ssr-compat"}
Ensure your VitePress theme components and custom code are compatible with server-side rendering.
:::

:::card{title="Connecting to a CMS" href="/guides/customization-cms"}
Connect VitePress to a headless CMS using dynamic routes and data loaders.
:::
::::

## Related pages

- [Experimental](./experimental-index.md)
- [Guide](./guide-index.md)
- [Introduction](./introduction-index.md)
- [Overview](./overview-index.md)
- [Reference](./reference-index.md)
- [VitePress](../index.md)
- [Writing](./writing-index.md)
- [Frontmatter Config](./reference-frontmatter-config.md)
- [Markdown Extensions](./writing-markdown.md)
- [MPA Mode](./experimental-mpa-mode.md)

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