> For the complete documentation index, see [llms.txt](https://docs.cloudimage.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.cloudimage.io/transformations/image-watermarking/dynamic-watermark.md).

# Dynamic watermark

Dynamic (defined in URL) image overlay

The dynamic watermark function allows you to specify the watermark image in the Cloudimage URL. This way, different watermarks can be used with different images.

## Available parameters

| Parameter                                               | Syntax                                                                                                            | Description                                                                                                                    |       |        |                           |                     |                                                   |
| ------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------ | ----- | ------ | ------------------------- | ------------------- | ------------------------------------------------- |
| use watermark                                           | <mark style="color:purple;">**wat=1**</mark>                                                                      | **(required)** Activates the watermark function                                                                                |       |        |                           |                     |                                                   |
| watermark URL                                           | <mark style="color:purple;">**wat\_url=X**</mark>                                                                 | **(required)** The URL of the watermark image. Can be URL-encoded                                                              |       |        |                           |                     |                                                   |
| watermark gravity                                       | <p><mark style="color:purple;"><strong>wat\_gravity=X</strong></mark><br><code>X=\[north                          | south]\[east                                                                                                                   | west] | center | </code><br><code>absolute | relative</code></p> | Defines the position to "anchor" the watermark to |
| watermark scaling (relative to original watermark size) | <p><mark style="color:purple;"><strong>wat\_scale=X</strong></mark><br><code>X=0..100</code></p>                  | Watermark image scaling defined in in percent of the watermark dimensions                                                      |       |        |                           |                     |                                                   |
| watermark scaling (relative to output image size)       | <p><mark style="color:purple;"><strong>wat\_scale=Xp</strong></mark><br><code>X=0..100p</code></p>                | Watermark image scaling defined in in percent of the output image dimensions                                                   |       |        |                           |                     |                                                   |
| watermark padding                                       | <p><mark style="color:purple;"><strong>wat\_pad=X\[p]\[,Y\[p]]</strong></mark><br><code>X/Y=0..100\[p]</code></p> | Adds padding from the anchoring point in pixels (**X**) or in percent (**Xp**)                                                 |       |        |                           |                     |                                                   |
| watermark position                                      | <mark style="color:purple;">**wat\_pos=X\[,Y]**</mark>                                                            | <p>sets the position in percent from the resized image; works only with<br>wat\_gravity=absolute and wat\_gravity=relative</p> |       |        |                           |                     |                                                   |
| watermark opacity                                       | <p><mark style="color:purple;"><strong>wat\_opacity=X</strong></mark><br><code>X=0..1</code></p>                  | Defines watermark opacity                                                                                                      |       |        |                           |                     |                                                   |

## Examples

| Preview                                                                                            | Syntax                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| -------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| ![](https://content.gitbook.com/content/IDIcmPiz7q6Sr6ZHHQxV/blobs/a2PQNYEYGnKQxzVkiPPK/image.png) | [/samples.scalefelx.com/voyage-louis-vuitton.jpg?<mark style="color:orange;">**w=600**</mark>&<mark style="color:purple;">**wat=1**</mark>&<mark style="color:purple;">**wat\_url=http://sample.li/louis-vuitton-logo-white.png**</mark>&<mark style="color:purple;">**wat\_scale=45**</mark>&<mark style="color:purple;">**wat\_gravity=southeast**</mark>&<mark style="color:purple;">**wat\_pad=15**</mark>](https://doc.cloudimg.io/https://samples.scaleflex.com/voyage-louis-vuitton.jpg?w=600\&wat=1\&wat_url=http://sample.li/louis-vuitton-logo-white.png\&wat_scale=45\&wat_gravity=southeast\&wat_pad=15) |