TGA to ICO Converter: Free, Private, No Upload

What actually changes in this conversion

• Both TGA and ICO are lossless, so the pixels come through unchanged.
• Transparency is preserved, including soft edges.
• ICO holds images up to 256 by 256 pixels. Larger sources are scaled down.
• EXIF, GPS and camera data are stripped on every conversion. That is good for privacy, but you lose capture dates.

About TGA: history and technical details

Created by Truevision in 1984 for the TARGA and VISTA graphics cards. It became a standard for video editing (Windows and Mac) and later game texture pipelines. Still widely used in Unity, Unreal and 3D tools.

Technical: 18-byte header with image type, colour map, width, height, bit depth. Types 1, 2, 3, 9, 10, 11 for uncompressed and RLE variants. Supports 8-bit indexed, 15/16-bit high colour, 24-bit truecolour, 32-bit with alpha. Bottom-left origin by default.

Real-world size: A 1024x1024 32-bit TGA is 4 MB uncompressed, 1-3 MB with RLE. A 2048x2048 texture is 16 MB uncompressed. Game engines prefer DDS or KTX2 for shipping but TGA for authoring.

Popular tools: Unity, Unreal Engine, Blender, GIMP, Adobe Photoshop, ImageMagick, NVIDIA Texture Tools.

Alternatives: DDS (better for games), KTX2 (modern GPU texture), PNG (universal), WebP (web).

About ICO: what you get

Introduced by Microsoft with Windows 1.0 in 1985. The modern 32-bit alpha version became standard with Windows XP (2001). Windows Vista (2007) added PNG compression inside ICO for icons larger than 48x48.

Technical: Container holds 1-65535 images. Each entry has a 16-byte directory: width, height, colour count, planes, bit count, data size, data offset. Images are BMP (DIB) or PNG. Max dimension 256x256. Typical Windows icons use 16, 32, 48, 64, 128, 256.

Real-world size: A 6-size favicon.ico is typically 15-40 KB. A single 256x256 PNG favicon is 8-15 KB. Modern best practice uses separate files for 16, 32, 180 (Apple), 192, 512 (PWA).

Popular tools: IcoFX, GIMP, Adobe Photoshop (with plugin), ImageMagick, Favicon Generator, RealFaviconGenerator.

Alternatives: PNG (single size, widely accepted), SVG (sharp at any size), favicon.ico (still needed for legacy).

Browser and software compatibility

TGA: Supported by game engines and 3D tools, but not displayed by browsers. ICO: Supported by Windows and by browsers as a favicon, but most image viewers and editors do not open it directly.

ICO is meant for favicons and Windows icons. It is not a general-purpose image format.

Why people move away from TGA

• Browsers and most messaging apps cannot display TGA, so sharing it is awkward.
• TGA files are large because compression is minimal.

Why people choose ICO

• Browsers and Windows still look for favicon.ico at the root of a site by default.
• One ICO file can carry several sizes, so tab icons, bookmarks and shortcuts all look sharp.
• Windows shortcuts and application icons expect ICO.

Common mistakes with TGA

• Uploading TGA to a website — browsers will not display it
• Forgetting alpha channel in TGA exports — some tools drop it
• Assuming RLE TGA is fast — it is slower to decode than uncompressed

Best practices for keeping quality

• A TGA from a game pipeline may use a bottom-left origin or channel-packed data. Compare against the original before relying on it.
• Start from a square image of at least 256 by 256 pixels and keep the design simple, since it will often be shown at 16 by 16.
• Keep a PNG or SVG copy. Modern browsers accept link rel="icon" pointing at PNG or SVG.
• Resize before converting if the image will be shown small. A 4000 pixel photo displayed at 800 pixels wastes bytes in any format.
• Check the result at 100 percent zoom, especially around text, edges and gradients, before you replace any originals.
• Keep your original files. Conversions to a lossy format cannot be undone.
• When you convert a set of images, use the same quality setting for the whole batch. The converter handles up to 20 files at once.