TGA to ICO: Complete Conversion Guide for Icons & Favicons

By Bill Crawford  ·  March 2026  ·  8 min read  ·  Last updated March 6, 2026

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What Is the ICO Format?

ICO is the native icon format for Windows and the original favicon format for the web. First introduced with Windows 1.0 in 1985, the ICO format has one defining feature that sets it apart from every other image format: it can contain multiple images of different sizes inside a single file. When Windows displays a file's icon in Explorer, or when a browser renders your website's favicon in its tab bar, it selects the most appropriate embedded size automatically.

A modern ICO file typically contains PNG frames at 16×16, 32×32, 48×48, 64×64, 128×128, and 256×256 pixels. Each frame is a fully independent image with its own pixel data and alpha channel. The operating system or browser chooses the frame that best fits the display context — the 16×16 frame for a browser tab, the 256×256 frame for Windows' extra-large icon view.

TGA: The Game Developer's Format

TGA (Truevision Graphics Adapter, or Targa) is a raster image format originally created by Truevision Inc. in 1984. Unlike HEIC or WebP, which are designed for efficient storage and web delivery, TGA was built for direct, lossless pixel storage in production pipelines. It supports 8-, 16-, 24-, and 32-bit color depths, with the 32-bit variant providing a full alpha channel — making it the preferred format for game textures that need transparency.

TGA files are produced by virtually every major 3D and game development tool: Blender, Maya, 3ds Max, Cinema 4D, Unreal Engine, and Unity all export or import TGA natively. It is the lingua franca of the game asset pipeline — but it is completely unsupported by web browsers as an image source, and cannot be used as a Windows icon without conversion.

When Should You Convert TGA to ICO?

The most common scenarios for TGA-to-ICO conversion are:

• Game application icons. When packaging a Windows game or desktop application, the installer and executable require an ICO file for the taskbar, Start menu, and Windows shell. If your icon source art lives in TGA format (as it commonly does in game asset pipelines), converting to multi-size ICO is the required step before packaging.
• Favicon creation from game logos. Web developers or game studios building a game's website often have the logo available only as a TGA sprite sheet or texture. Converting TGA to ICO produces a ready-to-deploy favicon without any intermediate format conversions.
• Legacy software and desktop tools. Older Windows development toolchains (Delphi, MFC, WinForms, Visual Basic 6) require ICO format for embedded application resources. TGA is a natural input format when the design originated in a 3D or game tool.
• Desktop shortcut icons. Custom desktop shortcuts on Windows use ICO files to define their visual appearance. If you have a TGA logo or symbol, converting to ICO lets you use it for a custom shortcut icon without installing image editing software.

TGA vs ICO: Format Comparison

Understanding ICO Sizes

The most important thing to understand about ICO files is that small sizes require very different design considerations than large ones. At 16×16 pixels, you have 256 pixels total — barely enough to suggest a recognizable shape. A detailed game texture or complex logo will almost always look blurry or unreadable at 16×16.

For best results with TGA-to-ICO conversion, choose source images that have:

• High contrast. Thin lines, subtle gradients, and fine detail disappear at 16px. Bold, high-contrast shapes work best.
• A clear focal subject. A single centered object reads better than a complex scene or full game texture.
• Simple backgrounds. A solid or transparent background helps the subject stand out at tiny sizes.
• Square composition. ICO frames are square. Source TGA images that aren't square will be scaled with letterboxing or cropping depending on the tool.

Game logos, emblems, symbols, and simple character portraits typically convert well. Full scene textures, panoramic maps, or highly detailed artwork generally do not.

TGA File Types Explained

TGA is not a single format — it has several internal image types defined by a header byte:

• Type 2 — Uncompressed RGB/RGBA. The most common type. Stores pixel data directly with no compression. Files are large but universally compatible.
• Type 3 — Uncompressed grayscale. Single-channel data. Less common; used for height maps, displacement maps, and mask textures.
• Type 10 — RLE-compressed RGB/RGBA. Uses run-length encoding to reduce file size. Supported by all major tools; common output from Blender and Photoshop.
• Type 11 — RLE-compressed grayscale. Compressed variant of Type 3.

The browser-based TGA to ICO converter on this site handles all four types. If your TGA file was produced by Blender, Maya, Unreal Engine, Unity, Photoshop, or any mainstream 3D/game tool, it will work.

Using ICO as a Favicon

ICO is the original favicon format and remains the most compatible choice. To use your converted ICO as a website favicon:

1. Rename the output file to favicon.ico.
2. Place it in the root directory of your website (e.g. https://yoursite.com/favicon.ico).
3. Optionally add an explicit link tag: <link rel="icon" href="/favicon.ico" sizes="48x48">
4. Test in Chrome, Firefox, and Safari to verify the favicon appears correctly.

Modern best practice also adds an SVG or PNG favicon for high-DPI displays, with the ICO as the fallback for legacy browsers. The ICO handles universal compatibility; SVG or PNG handles modern high-DPI rendering.

Conversion Methods

Browser-Based (No Installation)

The TGA to ICO Converter on this site handles everything client-side. Drop your TGA files, click convert, and download ICO files containing all six standard sizes. No account, no upload, no file size limits — the TGA decoder and ICO encoder both run entirely in your browser using JavaScript.

ImageMagick (Command Line)

For batch conversion on macOS, Linux, or Windows with ImageMagick installed:

magick input.tga -resize 256x256 -define icon:auto-resize="256,128,64,48,32,16" output.ico

This creates a multi-size ICO from the TGA source in one command. ImageMagick handles TGA natively without any additional libraries.

GIMP (Desktop, Free)

GIMP supports both TGA import and ICO export natively. Open your TGA file, then use File → Export As → select .ico. GIMP's ICO export dialog lets you manually configure which sizes to include.

Tips & Best Practices

• Test at 16×16 first. Open the ICO in Windows Explorer and switch to Small Icons view. If the icon is unrecognizable at 16px, the source TGA is too complex for icon use.
• Use a centered, square crop. Icon canvases are square. Source images with off-center or non-square compositions will be letterboxed. Crop the TGA to a square before converting if possible.
• Use 32-bit TGA for transparency. If your icon needs a transparent background (recommended for Windows icons), ensure the source TGA is 32-bit RGBA. The converter preserves alpha channels through all six ICO frames.
• Avoid fine text. Any text smaller than about 24px in the original TGA will be unreadable in the 16px ICO frame. Remove text or use only bold single letters.
• Batch convert for design systems. If you need ICO files for multiple game assets or icons in a design system, the batch mode with ZIP download is the most efficient approach.

Frequently Asked Questions

Can I use a TGA-converted ICO file as a favicon?

Yes. Convert your TGA to ICO using the browser-based tool, rename the output to favicon.ico, and place it in your website's root directory. All major browsers support .ico favicons natively.

How many sizes should an ICO file contain?

For modern Windows and browser use, include at minimum 16×16, 32×32, and 48×48. For full high-DPI and Windows shell support, add 64×64, 128×128, and 256×256 as well. The tool generates all six sizes automatically.

Does TGA to ICO conversion preserve transparency?

Yes — 32-bit TGA files with alpha channels are fully supported. The alpha data is preserved through the canvas rendering pipeline and encoded into each PNG frame of the ICO output.

What TGA types are supported?

The converter supports uncompressed TGA (types 2 and 3) and RLE-compressed TGA (types 10 and 11), covering files from Blender, Maya, Unreal Engine, Unity, Photoshop, and most mainstream game and 3D tools.

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