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

BMP vs EXR

Ein detaillierter Vergleich von BMP Image und OpenEXR Image — Dateigröße, Qualität, Kompatibilität und welches je nach Workflow zu wählen ist.

BMP → EXR umwandeln EXR → BMP umwandeln

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.

Über BMP-Dateien

EXR

OpenEXR Image

Raster & Vector Images

OpenEXR is a high dynamic range imaging format used in visual effects and film production.

Über EXR-Dateien

Vorteilsvergleich

BMP Vorteile

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.

EXR Vorteile

Genuine high-dynamic-range storage (32-bit float per channel).
Multi-channel layers native — store an entire render pass in one file.
Industry standard across every major VFX and animation studio.
Deep samples enable modern compositing workflows.
Open-source reference implementation with mature tooling.

Einschränkungen

BMP Einschränkungen

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.

EXR Einschränkungen

Enormous file sizes.
Not a web format — browsers don't display EXR.
Decoding is CPU-intensive.
Consumer apps rarely need HDR at this precision.

Technische Spezifikationen

Spezifikation	BMP	EXR
MIME type	image/bmp	image/x-exr
Extensions	.bmp, .dib	—
Compression	None (typical); RLE 4/8 bit (rare)	ZIP, PIZ, PXR24, B44, DWAA, DWAB, RLE, None
Color depths	1, 4, 8, 16, 24, 32 bits per pixel	—
Byte order	Little-endian	—
Extension	—	.exr
Bit depths	—	16-bit half-float, 32-bit float, 32-bit uint
Max channels	—	Practically unlimited (arbitrary named layers)

Typische Dateigrößen

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

EXR

1080p half-float with alpha 15-25 MB
4K multichannel VFX render 200-500 MB
8K deep EXR (heavy comp) 1-4 GB per frame

Bereit zum Umwandeln?

Wandle zwischen BMP und EXR online um, kostenlos und ohne Installation. Verschlüsselter Upload, automatische Löschung in 60 Minuten.

BMP zu EXR umwandeln EXR zu BMP umwandeln

Häufig gestellte Fragen

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.