> ## Documentation Index
> Fetch the complete documentation index at: https://www.alttextlab.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Browser extensions

> Generate alt text for any image on any website with a right-click.

The AltTextLab browser extension lets you generate alt text for any publicly accessible image directly in your browser. Right-click an image, select **AltTextLab: Get alt text**, and the description appears in a popup within seconds.

## Supported browsers

<CardGroup cols={3}>
  <Card title="Chrome" icon="chrome" href="/integrations/browser/chrome">
    Install from the Chrome Web Store.
  </Card>

  <Card title="Firefox" icon="firefox" href="/integrations/browser/firefox">
    Install from Mozilla Add-ons.
  </Card>

  <Card title="Edge" icon="edge" href="/integrations/browser/edge">
    Install from the Microsoft Edge Add-ons store.
  </Card>
</CardGroup>

## How it works

1. Right-click any image on a public webpage
2. Select **AltTextLab: Get alt text** from the context menu
3. The extension sends the image URL to the AltTextLab API
4. A description appears in a popup — click to copy

## Requirements

* An API key from the [AltTextLab dashboard](https://app.alttextlab.com/settings/api-keys)
* The image must be publicly accessible (not behind a login or firewall)

## Troubleshooting

If you see an error message, see the [Troubleshooting](/integrations/browser/troubleshooting) page for fixes for common issues.