> 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.md).
# Image filters
Filters allow you to modify images on the fly by applying different effects.
Most of the on-the-fly image transformations can be configured using the [Asset Variation Builder](/transformations/asset-variation-builder.md), an in-line URL builder to preview each image transformation instantly.
## Available filters
| Filter | Syntax | Description | | | |
| ------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------ | --------------------------------------------------------------- | ------------------------------------------------------------------ | -------------------------------------------------------------------- | --------------------------------------------- |
| [Brightness](/transformations/image-filters/adjustment/brightness.md) | **bright=X** \| **f=bright:X** | adjusts the brightness of the image | | | |
| [Contrast](/transformations/image-filters/adjustment/contrast.md) | **contrast=X** \| **f=contrast:X** | adjusts the contrast of the image | | | |
| [Saturate](/transformations/image-filters/adjustment/saturate.md) | **saturate=X** \| **f=saturate:X** | adjusts the saturation of the image | | | |
| [Grayscale](/transformations/image-filters/colorize/grayscale.md) | gray=1 | f=gray |
grey=1 | f=grey
| converts the image to a black and white one |
| [Color overlay](/transformations/image-filters/colorize/color-overlay.md) | **colorize=X** \| **colourise=X** | applies a color overlay | | | |
| [Pixelate](/transformations/image-filters/pixelate.md) | pixelate=X | f=pixelate:X |
pixellate=X | f=pixellate:X
| pixelates the image into X-pixel-sized blocks |
| [Blur](/transformations/image-filters/blur.md) | **blur=X** \| **f=blur:X** | applies Gaussian blur | | | |
| [Sharpen](/transformations/image-filters/sharpen.md) | **sharp=X** \| **f=sharp:X** | applies unsharp mask to sharpen the image | | | |
| [Face blur](/transformations/image-filters/face-blur.md) | **blur\_faces=X** | detects all faces in the image and applies blur to conceal them | | | |
## Combining filters
To use more than one filter, you can either use separate parameters or concatenate them with commas into the **f** parameter:
| Preview | Syntax |
| -------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
|  | Separate parameters:
/samples.scaleflex.com/ny\_doc.jpg?bright=15&contrast=30&gray=1
|
|  | Concatenate into the f parameter:
/samples.scaleflex.com/ny\_doc.jpg?f=bright:15,contrast:30,gray
|
