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Image MIME Reference
JPEG-XR-(HEIF)

JPEG XR Image (HEIF Container)

image/jxra
VS

PaintShop Pro Image

image/x-paintshoppro
PaintShop-Pro-PSP

A complete technical comparison of JPEG XR Image (HEIF Container) 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-(HEIF) 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 Image (HEIF Container)
image/jxra
Extension
.jxra
Container HEIF / ISOBMFF (ISO/IEC 23008-12 / Annex F of ITU-T T.832)
Compression Lossy / Lossless
Algorithm
JPEG XR (Lapped Biorthogonal Transform)
Color Depth 8-bit, 16-bit, 32-bit (Float)
Developed by ISO/IEC JTC 1 / ITU-T
Released 2019
Magic Bytes
XX XX XX XX 66 74 79 70 6A 78 72 41
Full JPEG-XR-(HEIF) 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-(HEIF) PaintShop-Pro-PSP
Chrome Chrome
✕ ✕
Firefox Firefox
✕ ✕
Safari Safari
✕ ✕
Edge Edge
✕ ✕
IE IE (Legacy)
✕ ✕
JPEG-XR-(HEIF)

JPEG-XR-(HEIF) Strengths

  • Combines the deep color (32-bit float) and mathematically lossless compression of JPEG XR with the robust metadata architecture of HEIF
  • Allows grouping multiple images, exposure brackets, or focal stacks into a single file collection
Limitations
  • Practically non-existent software and operating system support compared to standard HEIC or legacy JPEG XR (.jxr)
  • Zero web browser support, rendering it entirely unsuitable for public web deployment
  • Eclipsed by modern standards like AVIF and JPEG XL which offer superior compression with much broader industry backing
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-(HEIF)
Use JPEG-XR-(HEIF) when…
  • Specialized Archival
  • Experimental Imaging Workflows
  • High Dynamic Range (HDR) Imaging
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-(HEIF) vs ACES → PaintShop-Pro-PSP vs ACES → JPEG-XR-(HEIF) vs APNG → PaintShop-Pro-PSP vs APNG → JPEG-XR-(HEIF) vs AVCI → PaintShop-Pro-PSP vs AVCI → JPEG-XR-(HEIF) vs AVCS → PaintShop-Pro-PSP vs AVCS → JPEG-XR-(HEIF) vs AVIF → PaintShop-Pro-PSP vs AVIF → All comparisons →
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