---
title: Open Link
description: Open a URL from a UI interaction.
icon: arrow-up-right-from-square
---

import { ComponentPreview } from '/snippets/component-preview.mdx'

`OpenLink` opens a URL through the host application's link handler. Use it for navigation buttons, "View docs" links, or any action that should take the user to an external resource.

<ComponentPreview json={{"view":{"type":"Button","label":"View Documentation","variant":"link","size":"default","disabled":false,"onClick":{"action":"openLink","url":"https://prefab-ui.dev"}}}} playground="ZnJvbSBwcmVmYWJfdWkuY29tcG9uZW50cyBpbXBvcnQgQnV0dG9uCmZyb20gcHJlZmFiX3VpLmFjdGlvbnMgaW1wb3J0IE9wZW5MaW5rCgpCdXR0b24oIlZpZXcgRG9jdW1lbnRhdGlvbiIsIHZhcmlhbnQ9ImxpbmsiLAogICAgICAgb25fY2xpY2s9T3BlbkxpbmsoImh0dHBzOi8vcHJlZmFiLXVpLmRldiIpKQo=">
<CodeGroup>
```python Python icon="python"
from prefab_ui.components import Button
from prefab_ui.actions import OpenLink

Button("View Documentation", variant="link",
       on_click=OpenLink("https://prefab-ui.dev"))
```
```json Protocol icon="brackets-curly"
{
  "view": {
    "type": "Button",
    "label": "View Documentation",
    "variant": "link",
    "size": "default",
    "disabled": false,
    "onClick": {"action": "openLink", "url": "https://prefab-ui.dev"}
  }
}
```
</CodeGroup>
</ComponentPreview>

## Link Buttons

Pair `OpenLink` with the `link` button variant for a natural look:

<ComponentPreview json={{"view":{"cssClass":"gap-4","type":"Row","children":[{"type":"Button","label":"GitHub","variant":"link","size":"default","disabled":false,"onClick":{"action":"openLink","url":"https://github.com/prefecthq/prefab"}},{"type":"Button","label":"PyPI","variant":"link","size":"default","disabled":false,"onClick":{"action":"openLink","url":"https://pypi.org/project/prefab-ui"}}]}}} playground="ZnJvbSBwcmVmYWJfdWkuY29tcG9uZW50cyBpbXBvcnQgQnV0dG9uLCBSb3cKZnJvbSBwcmVmYWJfdWkuYWN0aW9ucyBpbXBvcnQgT3BlbkxpbmsKCndpdGggUm93KGdhcD00KToKICAgIEJ1dHRvbigiR2l0SHViIiwgdmFyaWFudD0ibGluayIsCiAgICAgICAgICAgb25fY2xpY2s9T3BlbkxpbmsoImh0dHBzOi8vZ2l0aHViLmNvbS9wcmVmZWN0aHEvcHJlZmFiIikpCiAgICBCdXR0b24oIlB5UEkiLCB2YXJpYW50PSJsaW5rIiwKICAgICAgICAgICBvbl9jbGljaz1PcGVuTGluaygiaHR0cHM6Ly9weXBpLm9yZy9wcm9qZWN0L3ByZWZhYi11aSIpKQo=">
<CodeGroup>
```python Python icon="python"
from prefab_ui.components import Button, Row
from prefab_ui.actions import OpenLink

with Row(gap=4):
    Button("GitHub", variant="link",
           on_click=OpenLink("https://github.com/prefecthq/prefab"))
    Button("PyPI", variant="link",
           on_click=OpenLink("https://pypi.org/project/prefab-ui"))
```
```json Protocol icon="brackets-curly"
{
  "view": {
    "cssClass": "gap-4",
    "type": "Row",
    "children": [
      {
        "type": "Button",
        "label": "GitHub",
        "variant": "link",
        "size": "default",
        "disabled": false,
        "onClick": {"action": "openLink", "url": "https://github.com/prefecthq/prefab"}
      },
      {
        "type": "Button",
        "label": "PyPI",
        "variant": "link",
        "size": "default",
        "disabled": false,
        "onClick": {"action": "openLink", "url": "https://pypi.org/project/prefab-ui"}
      }
    ]
  }
}
```
</CodeGroup>
</ComponentPreview>

## Dynamic URLs with State

Build URLs from client state using interpolation:

<ComponentPreview json={{"view":{"cssClass":"gap-3","type":"Column","children":[{"name":"repo","type":"Input","inputType":"text","placeholder":"owner/repo","disabled":false,"readOnly":false,"required":false},{"type":"Button","label":"Open on GitHub","variant":"default","size":"default","disabled":false,"onClick":{"action":"openLink","url":"https://github.com/{{ repo }}"}}]}}} playground="ZnJvbSBwcmVmYWJfdWkuY29tcG9uZW50cyBpbXBvcnQgSW5wdXQsIEJ1dHRvbiwgQ29sdW1uCmZyb20gcHJlZmFiX3VpLmFjdGlvbnMgaW1wb3J0IE9wZW5MaW5rCgp3aXRoIENvbHVtbihnYXA9Myk6CiAgICByZXBvID0gSW5wdXQobmFtZT0icmVwbyIsIHBsYWNlaG9sZGVyPSJvd25lci9yZXBvIikKICAgIEJ1dHRvbigKICAgICAgICAiT3BlbiBvbiBHaXRIdWIiLAogICAgICAgIG9uX2NsaWNrPU9wZW5MaW5rKGYiaHR0cHM6Ly9naXRodWIuY29tL3tyZXBvLnJ4fSIpLAogICAgKQo=">
<CodeGroup>
```python Python icon="python"
from prefab_ui.components import Input, Button, Column
from prefab_ui.actions import OpenLink

with Column(gap=3):
    repo = Input(name="repo", placeholder="owner/repo")
    Button(
        "Open on GitHub",
        on_click=OpenLink(f"https://github.com/{repo.rx}"),
    )
```
```json Protocol icon="brackets-curly"
{
  "view": {
    "cssClass": "gap-3",
    "type": "Column",
    "children": [
      {
        "name": "repo",
        "type": "Input",
        "inputType": "text",
        "placeholder": "owner/repo",
        "disabled": false,
        "readOnly": false,
        "required": false
      },
      {
        "type": "Button",
        "label": "Open on GitHub",
        "variant": "default",
        "size": "default",
        "disabled": false,
        "onClick": {"action": "openLink", "url": "https://github.com/{{ repo }}"}
      }
    ]
  }
}
```
</CodeGroup>
</ComponentPreview>

## API Reference

<Card icon="code" title="OpenLink Parameters">
<ParamField body="url" type="str" required>
  URL to open. Can be passed as a positional argument. Supports `{{ key }}` interpolation.
</ParamField>
</Card>

## Protocol Reference

```json OpenLink
{
  "action": "openLink",
  "url": "string (required)"
}
```

For the complete protocol schema, see [OpenLink](/protocol/open-link).
