Free online BMP to TGA converter

A game engine, 3D application, or texture tool may require TGA instead of BMP when importing image assets. Converting locally or on 101convert.com changes the container format while preserving the available pixel data and provides TGA options such as alpha-channel storage and RLE compression.

What the BMP format is

BMP (Bitmap) is a raster image format developed by Microsoft and commonly used by Windows Paint, older Windows utilities, screenshots, scanned images, legacy software, and raw image workflows. It supports indexed palettes and direct-color images such as 24-bit RGB and 32-bit formats, although alpha-channel handling varies between BMP implementations. BMP is widely supported and usually stores pixels with little or no compression, so files are often larger than compressed image formats.

What the TGA format is

TGA (Truevision TGA or TARGA) is a raster format used in game textures, 3D rendering, video compositing, and sprite workflows. It supports grayscale, indexed color, 16-bit color, 24-bit RGB, and 32-bit RGBA images. A 32-bit TGA can store an alpha channel for transparency, and TGA can use optional RLE compression, which is lossless but may not reduce the size of highly detailed or noisy images. Some texture pipelines prefer TGA because they explicitly support its color-depth, alpha, and origin settings.

How to convert BMP to TGA

Using 101convert.com

1. Open the BMP-to-TGA converter on 101convert.com; it can be used free without installing software.
2. Select or upload the .bmp file.
3. Choose TGA as the output format and start the conversion.
4. Download the .tga file and open it in the target game engine, 3D application, or image editor to verify import and transparency.

Using GIMP

1. Open the BMP with File → Open.
2. Choose File → Export As, enter a filename ending in .tga, and select Export.
3. In the TGA export dialog, enable RLE compression only if the receiving application supports compressed TGA. Keep or add an alpha channel when transparency is required.

GIMP is free and cross-platform. Adobe Photoshop can perform the same conversion through File → Save a Copy or the equivalent export command in the installed version; select Targa (.TGA) and choose the required bit depth.

Using ImageMagick

ImageMagick is useful for local, scripted, and batch conversion. Convert one file with:

magick input.bmp output.tga

Request RLE-compressed TGA output with:

magick input.bmp -compress RLE output.tga

For multiple BMP files in Windows PowerShell:

Get-ChildItem *.bmp | ForEach-Object { magick $_.FullName -compress RLE ("{0}.tga" -f $_.BaseName) }

Test the resulting files in the destination software because some applications accept only uncompressed TGA or a specific color depth.

Quality and compatibility limits

• Conversion does not increase resolution or restore detail that is absent from the BMP. Preserve the original dimensions unless the target application requires a particular size, such as power-of-two dimensions.
• A 24-bit BMP produces an RGB TGA without transparency. A 32-bit BMP may contain alpha data, but some BMP software ignores or discards it; inspect the source and export result rather than assuming that the alpha channel survived.
• Changing .bmp to .tga in the filename does not convert the file and cannot create transparency.
• Choose 24-bit RGB for images without transparency and 32-bit RGBA when the target requires an alpha channel. If import fails, disable RLE compression and check the required image origin, since TGA files can store pixels with either a top-left or bottom-left origin.
• RLE is lossless, but it is optional and does not guarantee a smaller file. Keep the original BMP as a backup, especially when converting indexed or alpha-bearing images.