BMP Sample Files

BMP files, short for Bitmap, are raster image files, similar to a JPG. BMP files contain a lot more information than JPGs, which makes their file size substantially larger. The extra data is designed to make the image more reliably displayed across different devices.

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Download BMP Sample Files

File	File type	File size	Dimensions (pixels)	Mime type	Download example file
BMP (500x500) Example File Download	Bitmap	733 KB	500x500	image/bmp	Download example file
BMP (1024x1024) Example File Download	Bitmap	3 MB	1024x1024	image/bmp	Download example file
BMP (2048x2048) Example File Download	Bitmap	12 MB	2048x2048	image/bmp	Download example file
BMP Sample - 800x600	BMP	1 MB	800 x 600	image/bmp	Download example file

What is a BMP file?

BMP (Bitmap) is an uncompressed raster format from Microsoft. It stores every pixel directly with no compression, so the files are large but completely lossless and very simple to read. BMP is mostly encountered in legacy Windows software and in situations where raw, unprocessed pixel data is wanted.

How these sample BMP files were made

Each image is generated with PHP's GD library as a labelled gradient and saved uncompressed. Because there is no compression, the file size grows roughly fourfold each time the dimensions double, which the sizes in the table above clearly show.

Technical details

BMP stores pixels uncompressed, which makes the format trivial to parse but inefficient to store or transfer. It typically carries no transparency. For almost any modern use, PNG or WebP is a better choice.

Common uses

Use these files to test legacy Windows imaging tools, raw raster handling, or conversion from an uncompressed format to a compressed one.