BMP vs SR2
A detailed comparison of BMP Image and Sony RAW SR2 — file size, quality, compatibility, and which format to choose for your workflow.
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Choosing between BMP (BMP Image, image/bmp) and SR2 (Sony RAW SR2, image/x-sony-sr2) depends on your target workflow, compression efficiency, and device support. Below is our side-by-side technical benchmark and instant bidirectional converter.
BMP vs SR2 at a glance
BMP vs SR2| Dimension | .BMP | .SR2 |
|---|---|---|
| Format Name | BMP Image (.bmp) | Sony RAW SR2 (.sr2) |
| Format Family | Raster & Vector Images | Raster & Vector Images |
| Primary MIME | image/bmp | image/x-sony-sr2 |
| Developer / Year | Microsoft & IBM (OS/2 + Windows 1.0) (1985) | Sony / Konica Minolta (2005) |
| Pipeline Role | Read & Write | Source Input |
When should you use BMP vs SR2?
.BMP Use when…
Use BMP (BMP Image) when your pipeline requires native image/bmp compatibility, predictable rendering, or specialized Raster & Vector Images editing support.
.SR2 Use when…
Use SR2 (Sony RAW SR2) when you need image/x-sony-sr2 delivery, cross-platform Raster & Vector Images distribution, or streamlined storage.
Technical Specifications
| Specification | .BMP | .SR2 |
|---|---|---|
| MIME type | image/bmp | image/x-sony-sr2 |
| Extensions | .bmp, .dib | — |
| Compression | None (typical); RLE 4/8 bit (rare) | — |
| Color depths | 1, 4, 8, 16, 24, 32 bits per pixel | — |
| Byte order | Little-endian | — |
| Extension | — | .sr2 |
| Container | — | TIFF/EP with Sony MakerNote |
| Successor | — | .arw (2008+) |
| Ancestor | — | .mrw (Konica Minolta) |
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.
.SR2 Strengths
- Full Sony Alpha early-era sensor data preserved.
- Supported by major raw processors.
- Metadata includes Konica Minolta pre-Sony era compatibility.
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.
.SR2 — Limitations
- Transitional format — limited to 2006-2008 bodies.
- Superseded by ARW.
- Proprietary with no public spec.
- Essentially legacy — no new content.
Technical deep dive: BMP vs SR2
Both BMP and SR2 serve distinct roles in modern digital pipelines. With KaijuConverter you can transcode between .bmp and .sr2 in seconds while preserving metadata and structural fidelity.
Frequently Asked Questions
BMP (BMP Image) uses MIME type image/bmp in the Raster & Vector Images family, whereas SR2 (Sony RAW SR2) uses image/x-sony-sr2 in the Raster & Vector Images family. Each optimizes for different trade-offs in file size, fidelity, and software compatibility.
Yes. KaijuConverter uses tuned encoding profiles to preserve maximum visual, audio, or document fidelity when converting between BMP and SR2.
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.
SR2 (Sony RAW SR2) is an image format used to store raster graphics — a two-dimensional grid of pixels describing a picture. It is part of the raster & vector images family and designed around a specific trade-off between file size, visual fidelity, and feature support (transparency, colour depth, compression type). Photographers, web designers, and content creators choose SR2 when its particular strengths match the publishing target.
BMP files open in Windows Paint, Photos, macOS Preview, GIMP, Photoshop, and virtually any image viewer. All Windows applications support BMP natively.
Most desktop photo viewers (Windows Photos, macOS Preview, GIMP, Photoshop, Affinity Photo) open SR2 natively. On mobile, iOS Photos and Google Photos display SR2 in the gallery when supported by the OS. If the format is rare or new, convert to JPG or PNG first — both are universally readable — using our SR2 to JPG or SR2 to PNG converter.
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.
Yes. Every .bmp file uploaded to KaijuConverter is transferred over TLS 1.3, processed in an isolated container with SHA-256 verification, and automatically deleted within 30–60 minutes (or immediately with 1 click).
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