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Image MIME Reference
JPEG-XR

JPEG XR (HD Photo)

image/vnd.ms-photo
VS

PaintShop Pro Image

image/x-paintshoppro
PaintShop-Pro-PSP

A complete technical comparison of JPEG XR (HD Photo) and PaintShop Pro Image — covering compression, feature support, browser compatibility, magic bytes, and when to choose each format.

Equal browser support

Feature Support

Feature JPEG-XR PaintShop-Pro-PSP
Transparency (Alpha) Yes Yes
Animation Support ✕ No ✕ No
Progressive Loading Yes ✕ No
HDR Support Yes Yes
EXIF Metadata Yes Yes
ICC Color Profile Yes Yes
JPEG XR (HD Photo)
image/vnd.ms-photo
Extension
.jxr.wdp.hdp
Container TIFF-like Image File Directory (IFD)
Compression Lossy (Lapped Bi-orthogonal Transform) / Lossless
Algorithm
Lapped Bi-orthogonal Transform (LBT)
Color Depth 8-bit (Grayscale, RGB, CMYK), 16-bit, 32-bit Floating Point (HDR)
Developed by Microsoft Corporation (later Joint Photographic Experts Group)
Released 2006
Magic Bytes
49 49 BC 01
Full JPEG-XR reference →
PaintShop Pro Image
image/x-paintshoppro
Extension
.psp.pspimage.tub.pat
Container PSP Chunk-based Format
Compression Uncompressed / RLE (Run-Length Encoding) / LZ77
Algorithm
RLELZ77
Color Depth 8-bit (Indexed), 16-bit (Grayscale), 24-bit (RGB), 32-bit (RGBA), 48-bit (High Color)
Developed by Jasc Software / Corel Corporation (Alludo)
Released 1990
Magic Bytes
7E 42 4B 00
Full PaintShop-Pro-PSP reference →

Browser Support Comparison

Browser JPEG-XR PaintShop-Pro-PSP
Chrome Chrome
✕ ✕
Firefox Firefox
✕ ✕
Safari Safari
✕ ✕
Edge Edge
✕ ✕
IE IE (Legacy)
✓
 ✕
JPEG-XR

JPEG-XR Strengths

  • Excellent support for 16-bit and 32-bit floating-point HDR images without massive file size bloat
  • Native support for alpha transparency, which standard JPEG fundamentally lacks
  • Computational complexity for decoding/encoding is relatively low, making it hardware-friendly
Limitations
  • Suffered a complete failure of adoption in the web browser market outside of Microsoft's ecosystem
  • Fully superseded by modern, open formats like WebP, AVIF, and JPEG XL which offer better compression and universal browser support
  • Multiple file extensions (.wdp, .hdp, .jxr) and MIME types cause confusion and parsing fragmentation
PaintShop-Pro-PSP

PaintShop-Pro-PSP Strengths

  • Provides robust, non-destructive editing capabilities with full support for vector layers, adjustment layers, and layer blend modes
  • Historically offered a highly capable and affordable alternative to Adobe Photoshop's PSD format for Windows users
  • Features proprietary support for 'Picture Tubes' (.tub), a unique brush technology that paints sequential or random raster objects along a path
Limitations
  • Deeply proprietary format tied exclusively to the Corel/Alludo ecosystem
  • Third-party software support (like GIMP or ImageMagick) is often limited to parsing older .psp files, frequently failing to render complex layers in modern .pspimage files
  • No support in modern web browsers; must be exported to a flattened web format (JPEG/PNG) for online viewing

When to choose which format

JPEG-XR
Use JPEG-XR when…
  • Legacy Windows Desktop Backgrounds
  • XPS (XML Paper Specification) Documents
  • Early High Dynamic Range (HDR) Photography
  • DirectX Textures
PaintShop-Pro-PSP
Use PaintShop-Pro-PSP when…
  • PaintShop Pro Multi-layer Project Archival
  • Digital Art and Photo Retouching
  • Picture Tubes (.tub) and Custom Patterns (.pat)

More comparisons

JPEG-XR vs ACES → PaintShop-Pro-PSP vs ACES → JPEG-XR vs APNG → PaintShop-Pro-PSP vs APNG → JPEG-XR vs AVCI → PaintShop-Pro-PSP vs AVCI → JPEG-XR vs AVCS → PaintShop-Pro-PSP vs AVCS → JPEG-XR vs AVIF → PaintShop-Pro-PSP vs AVIF → All comparisons →
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