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

# Adjustments & effects

> Brightness, contrast, saturation, blur, sharpen, auto-enhance, redeye reduction, and auto-compress.

Whole-image tonality and effects run after resize/crop and before text overlay.

<Frame caption="Original (left) vs `?auto=enhance&bri=108&con=105&sat=110&sharp=12` (right).">
  <img src="https://cdn.convertly.sh/cvly/o/convertly-site/docs/cdn-transforms/examples/adjustments-before-after.webp?v=docs-20260717&format=auto&q=auto:eco" alt="Image adjustments before and after" className="w-full rounded-xl" />
</Frame>

<Frame caption="`?auto=compress` — smaller encode for bandwidth-sensitive delivery.">
  <img src="https://cdn.convertly.sh/cvly/o/convertly-site/docs/cdn-transforms/examples/auto-compress.webp?v=docs-20260717&format=auto&q=auto:eco" alt="Photo with auto=compress" className="w-full rounded-xl" />
</Frame>

<Frame caption="Whole-image blur — `?blur=18`.">
  <img src="https://cdn.convertly.sh/cvly/o/convertly-site/docs/cdn-transforms/examples/adjustments-blur.webp?v=docs-20260717&format=auto&q=auto:eco" alt="Portrait with blur adjustment" className="w-full rounded-xl" />
</Frame>

## Parameters

| Param                      | Range                         | Notes                                                                                                |
| -------------------------- | ----------------------------- | ---------------------------------------------------------------------------------------------------- |
| `bri` (`brightness`)       | `0`–`200` (`100` = unchanged) | Whole-image brightness.                                                                              |
| `con` (`contrast`)         | `0`–`200`                     | Whole-image contrast.                                                                                |
| `sat` (`saturation`)       | `0`–`200`                     | Whole-image saturation.                                                                              |
| `hue`                      | `-180`–`180`                  | Hue rotation in degrees.                                                                             |
| `blur`                     | `0`–`100`                     | Gaussian blur on the full image. Distinct from `blurFaces`.                                          |
| `sharp` (`sharpen`, `usm`) | `0`–`100`                     | Unsharp mask strength.                                                                               |
| `auto`                     | flags                         | `enhance`, `redeye`, `compress`, `format` (comma-separated).                                         |
| `monochrome`               | hex (`#RRGGBB` or bare)       | Tint the raster to a single brand colour. Preserves alpha. Applied after adjustments, before encode. |

```
?w=900&bri=110&con=105&sat=95&hue=5
?w=900&blur=12&sharp=18
?w=900&auto=enhance
?w=900&auto=redeye
?w=900&auto=compress
?w=256&monochrome=7c3aed
```

`auto=enhance` applies a subtle brightness/contrast/saturation lift tuned for web delivery. `auto=redeye` runs face-aware redeye reduction when faces are detected (best-effort). `auto=compress` lowers output quality slightly for smaller files. `auto=format` is equivalent to `format=auto`.

For face- or plate-specific blur (not whole-image), see [Face and plate privacy](/docs/image-cdn/transforms/face-privacy).