BMP vs XCF — Differences, File Size & When to Use Each

BMP vs XCF

A detailed comparison of BMP Image and GIMP Image — file size, quality, compatibility, and which format to choose for your workflow.

Convert XCF → BMP

BMP

BMP Image

Raster & Vector Images

BMP is an uncompressed raster image format native to Windows. Files are large but preserve exact pixel data with no compression artifacts. Rarely used on the web due to file size.

About BMP files

XCF

GIMP Image

Raster & Vector Images

XCF is the native image format for GIMP, supporting layers, channels, and paths.

About XCF files

Strengths Comparison

BMP Strengths

Dead-simple format — trivially easy to read and write.
Lossless and uncompressed — perfect bit-exact pixel storage.
Universally supported in Windows applications since 1985.
Supports 1, 4, 8, 16, 24, and 32-bit color depths.

XCF Strengths

Native GIMP format — full fidelity for every tool and feature.
Open, documented spec.
Supports layers, channels, paths, masks, guides, selections.
Gzip-compressed variant keeps files compact.
Backward-compatible since 1995.

Limitations

BMP Limitations

Enormous file sizes — no meaningful compression in typical use.
Not a web format — browsers support it but nobody serves BMPs over HTTP.
No metadata support (no EXIF, no ICC profile in practice).
Multiple header versions mean "a BMP" is ambiguous — parsers must handle several variants.

XCF Limitations

Limited ecosystem — Photoshop, Illustrator, and browsers don't open XCF.
No native CMYK support (a longstanding GIMP limitation).
32-bit precision only since GIMP 3.0 (2025).
Export to PNG/JPEG/PSD is mandatory for client delivery.

Technical Specifications

Specification	BMP	XCF
MIME type	image/bmp	image/x-xcf
Extensions	.bmp, .dib	.xcf, .xcf.gz, .xcf.bz2
Compression	None (typical); RLE 4/8 bit (rare)	—
Color depths	1, 4, 8, 16, 24, 32 bits per pixel	—
Byte order	Little-endian	—
Native to	—	GIMP
Bit depths	—	8, 16, 32-bit per channel (since GIMP 2.10 / 3.0)
Color modes	—	RGB, Grayscale, Indexed

Typical File Sizes

BMP

Small icon (32×32) 4 KB
Screenshot (1920×1080) ~6 MB
4K image (3840×2160) ~25 MB
Scanned A4 at 300 dpi ~25 MB

XCF

Simple 2-layer edit 500 KB - 3 MB
Website mockup with 20 layers 10-50 MB
High-res photo composite 100-400 MB

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Frequently Asked Questions

BMP (Bitmap) is a raster image format developed by Microsoft for Windows. It stores images with no compression by default, resulting in large file sizes but pixel-perfect quality. It has been part of Windows since version 1.0.

BMP (Bitmap) is a raster image formato developed by Microsoft para Windows. It stores images com no compressão by default, resulting in large tamanho do arquivos mas pixel-perfect quality. It has been part of Windows since version 1.0.

BMP files open in Windows Paint, Photos, macOS Preview, GIMP, Photoshop, and virtually any image viewer. All Windows applications support BMP natively.

BMP arquivos abrir in Windows Paint, Photos, macOS Preview, GIMP, Photoshop, e virtually any image viewer. All Windows aplicativos support BMP natively.

PNG is better than BMP in almost every scenario since it provides lossless compression (smaller files), transparency support, and wider cross-platform use. BMP is mainly relevant for legacy Windows applications.

PNG is melhor que BMP in almost every scenario since it fornece sem perdas compressão (smaller files), transparência support, e wider cross-platform use. BMP is mainly relevant para legacy Windows aplicativos.