BMP (Bitmap Image File) is a BMP format commonly used for legacy Windows graphics, raw raster interchange, diagnostic test images. This guide covers compatibility, compression, transparency, and conversion choices.
| Feature | Support |
|---|---|
| Transparency | No |
| Animation | No |
| Layers | No |
| Primary uses | legacy Windows graphics, raw raster interchange, diagnostic test images |
Extension
.bmp
MIME type
image/bmp
Family
BMP
Compression
usually uncompressed
Browser support
legacy desktop apps
Simple raster structure
Predictable pixels
Wide legacy support
Very large files
Poor web fit
Limited modern features
BMP is the ImageHQ reference page for Bitmap Image File. It explains where the format works well, what tradeoffs to expect, and how to choose between BMP and related formats in production image workflows.
Use BMP when the workflow values legacy Windows graphics, raw raster interchange, diagnostic test images. This is the practical fit that matters before tuning compression or conversion settings.
- legacy Windows graphics
- raw raster interchange
- diagnostic test images
The main advantages of BMP are predictable in real projects: simple raster structure, predictable pixels, wide legacy support.
- Simple raster structure
- Predictable pixels
- Wide legacy support
BMP is not always the best delivery choice. Watch for very large files, poor web fit, limited modern features before using it as a default.
- Very large files
- Poor web fit
- Limited modern features
BMP uses usually uncompressed compression behavior. That affects file size, editability, transparency, and whether repeated export cycles can visibly change the image.
Convert BMP files when a recipient, browser, archive, or editing tool needs a different balance of compatibility, transparency, file size, or preservation.
BMP is web-ready when browser support and file size match the use case. Compare it with WebP, AVIF, PNG, and JPG before choosing a default.
BMP transparency support: no. Use PNG, WebP, AVIF, SVG, or PSD when alpha transparency is required.