> 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-filters/sharpen.md).

# Sharpen

Sharpening is a powerful tool to emphasize texture and details, especially on smaller images, e.g. thumbnails. Cloudimage can apply an **unsharp mask** filter which will make your image look sharper. You can specify the filter radius (X) in pixels.

<mark style="color:green;">**sharp=X**</mark>

## Examples

| Preview                          | Syntax                                                                                                                                                                                                                                                                                     |
| -------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| ![](/files/I5OzP0BYNoM75zyCsfHV) | <p>Only resize:<br><a href="https://doc.cloudimg.io/https://samples.scaleflex.com/darkside.jpg?w=300">/samples.scaleflex.com/darkside.jpg?<mark style="color:orange;"><strong>w=300</strong></mark></a></p>                                                                                |
| ![](/files/6uXPS0Ew86OfR49iKuDm) | <p>Resize and sharpen:<br><a href="https://doc.cloudimg.io/https://samples.scaleflex.com/darkside.jpg?w=300&#x26;sharp=3">/samples.scaleflex.com/darkside.jpg?<mark style="color:orange;"><strong>w=300</strong></mark>&<mark style="color:green;"><strong>sharp=3</strong></mark></a></p> |