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

# URL Prefill Parameters

> Pre-fill donation amount and frequency using URL parameters.

Givebutter Widgets support URL parameters that automatically pre-fill the donation amount and frequency when donors visit your page. This works with both button widgets (popup forms) and inline form widgets.

## Supported Parameters

| Parameter   | Description                         | Example              |
| ----------- | ----------------------------------- | -------------------- |
| `amount`    | Preset donation amount (in dollars) | `?amount=50`         |
| `frequency` | Donation frequency                  | `?frequency=monthly` |

### Frequency Options

Supported values for `frequency`:

* `monthly` - Donate every month
* `quarterly` - Donate every 3 months
* `yearly` - Donate once per year

## Examples

### Preset Donation Amount

Direct donors to a specific giving level:

```plaintext theme={null}
https://yoursite.org/donate?amount=100
```

### Monthly Giving Campaign

Create links for recurring donation campaigns:

```plaintext theme={null}
https://yoursite.org/donate?amount=25&frequency=monthly
```

This pre-fills a \$25/month recurring donation.