# Paint.NET ICO FileType

> Dependency-free ICO import/export for Paint.NET 5.1 and 5.2+, with modern and compatibility adapters.

Paint.NET ICO FileType adds proper multi-image `.ico` support to Paint.NET.

## What it does

- opens every decodable ICO frame as a named layer,
- handles PNG-backed and legacy BMP/DIB-backed icons,
- writes real multi-image ICO containers,
- exports common icon sizes from 16 px through 256 px,
- preserves transparency and can keep aspect ratio with transparent padding.

## Install

Download `paintdotnet-ico.zip` from the shared rolling **Latest** release. The ZIP contains separate adapters for Paint.NET 5.2+ and Paint.NET 5.1.x plus `Install.bat`.

For per-user installs, the helper uses:

```text
Documents\Paint.NET App Files\FileTypes
```

Classic installs can also use:

```text
C:\Program Files\Paint.NET\FileTypes
```

Restart Paint.NET after replacing a plugin DLL.

## Two adapters, one codec

- **Paint.NET 5.2+** uses the newer `PaintDotNet.FileTypes` API and .NET 10.
- **Paint.NET 5.1.x** keeps a compatibility adapter on the classic FileType API and .NET 9.

The actual ICO codec is shared plain C# with no external image-package dependency.

<Card title="Download latest" icon="download" href="https://github.com/twojstar/twojstar/releases/latest/download/paintdotnet-ico.zip">
  Stable rolling-release download.
</Card>