# Adjust brightness

- Human page: https://happytails.ai/en/image-tools/adjust-brightness/
- Markdown: https://happytails.ai/en/image-tools/adjust-brightness.md
- Structured JSON: https://happytails.ai/agents/en/image-tools/adjust-brightness/index.json
- Visibility: public

## Tool capabilities

| Property | Value |
| --- | --- |
| Tool ID | `adjust-brightness` |
| Category | image-tools |
| Implementation | Registered implementation. Registration alone is not a production-quality guarantee. |
| Browser execution | Use the visible action or interactive controls. |
| Browser processing | Browser; see tool notes for network behavior. |
| HTTP API | Not callable through HTTP. |
| Browser-agent interface | run_current_tool |

### Implementation notes

Runs in your browser. Animated inputs produce a single still image. Supported decoding depends on your browser.

### Inputs and settings

No free-text input is required. Use the file inputs and/or settings below.

Accepted browser files: `image/*,.svg,.avif`. Choose one file.

| Setting | Meaning | Control type | Default | Constraints |
| --- | --- | --- | --- | --- |
| `brightness` | Brightness (%) | number | 100 |  |
| `contrast` | Contrast (%) | number | 100 |  |

### Browser-agent workflow

1. Open the human page in a browser that supports WebMCP.
2. Discover the interface exposed by that page; use its actual schema.
3. Select files on the page first when the tool requires files.
4. Call `run_current_tool` with valid input and settings.
5. Inspect the returned result or error and the displayed output. Retrieve files from the displayed download links.

Calls do not automatically copy or download results. Browser permissions still apply. Interface availability alone is not proof of successful execution.

### Planning specification

Brightness and contrast controls; clipping preview and original comparison.

This describes intended requirements. Use the implementation notes, interface schema and observed output to determine current support.

### Complete machine-readable capability record

```json
{
  "id": "adjust-brightness",
  "category": "image-tools",
  "built": true,
  "requirements": "Brightness and contrast controls; clipping preview and original comparison.",
  "implementation": {
    "fields": [
      {
        "key": "brightness",
        "label": "Brightness (%)",
        "value": 100,
        "type": "number"
      },
      {
        "key": "contrast",
        "label": "Contrast (%)",
        "value": 100,
        "type": "number"
      }
    ],
    "files": true,
    "accept": "image/*,.svg,.avif",
    "input": false,
    "note": "Runs in your browser. Animated inputs produce a single still image. Supported decoding depends on your browser.",
    "experience": {
      "automatic": false,
      "single": false,
      "label": "Your text",
      "placeholder": "Type or paste your input…",
      "help": "Up to 1,000,000 characters. Review the settings before running.",
      "action": null
    },
    "mode": "explicit",
    "interactive": false
  },
  "execution": "Browser interface",
  "api": null,
  "browser_agent": {
    "supported": true,
    "name": "run_current_tool",
    "discovery": "WebMCP on the human page in a supporting browser",
    "verification": "See audit/API-AUDIT.md; availability is not verification"
  }
}
```

## Page guide

Make an image lighter or darker.

## Useful next steps

- [AVIF to JPG](https://happytails.ai/en/image-tools/avif-to-jpg/): Convert a AVIF image to JPG in your browser. ([Markdown](https://happytails.ai/en/image-tools/avif-to-jpg.md))

- [AVIF to PNG](https://happytails.ai/en/image-tools/avif-to-png/): Convert a AVIF image to PNG in your browser. ([Markdown](https://happytails.ai/en/image-tools/avif-to-png.md))

- [WEBP to PNG](https://happytails.ai/en/image-tools/webp-to-png/): Convert a WEBP image to PNG in your browser. ([Markdown](https://happytails.ai/en/image-tools/webp-to-png.md))

## How to use Adjust brightness

1. Choose a file in an image format your browser can open.
2. Review the settings, then choose Run Adjust brightness.
3. Review the result, then use Copy result or a download link when available.

## What to expect

Make an image lighter or darker. 100% keeps the original brightness. Choose a lower value to darken it or a higher value to brighten it.