> 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

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                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| -------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| ![](/files/cWTBOtuOAT3BPayZwAZn) | [/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) |


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