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Image MIME Reference
JPEG-XS-(HEIF)

JPEG XS Image (HEIF Container)

image/jxsi
VS

Olympus Raw Format

image/x-olympus-orf
Olympus-ORF

A complete technical comparison of JPEG XS Image (HEIF Container) and Olympus Raw Format — covering compression, feature support, browser compatibility, magic bytes, and when to choose each format.

Equal browser support

Feature Support

Feature JPEG-XS-(HEIF) Olympus-ORF
Transparency (Alpha) Yes ✕ No
Animation Support ✕ No ✕ No
Progressive Loading ✕ No ✕ No
HDR Support Yes Yes
EXIF Metadata Yes Yes
ICC Color Profile Yes Yes
JPEG XS Image (HEIF Container)
image/jxsi
Extension
.jxsi.jxs.hif
Container HEIF / ISOBMFF (ISO/IEC 23008-12)
Compression Lossy (Visually Lossless) / Mathematically Lossless
Algorithm
JPEG XS (ISO/IEC 21122-1)
Color Depth 8-bit, 10-bit, 12-bit, 14-bit, 16-bit
Developed by Joint Photographic Experts Group (JPEG)
Released 2019
Magic Bytes
XX XX XX XX 66 74 79 70 6A 78 73 69
Full JPEG-XS-(HEIF) reference →
Olympus Raw Format
image/x-olympus-orf
Extension
.orf
Container TIFF-based (with proprietary variants)
Compression Uncompressed / Proprietary Lossless
Algorithm
NoneOlympus Proprietary Lossless
Color Depth 12-bit (Per Channel)
Developed by Olympus Corporation (Now OM Digital Solutions)
Released 2000
Magic Bytes
49 49 52 4F (IIRO) or 4D 4D 4F 52 (MMOR) or 49 49 53 52 (IIRS)
Full Olympus-ORF reference →

Browser Support Comparison

Browser JPEG-XS-(HEIF) Olympus-ORF
Chrome Chrome
✕ ✕
Firefox Firefox
✕ ✕
Safari Safari
✕ ✕
Edge Edge
✕ ✕
IE IE (Legacy)
✕ ✕
JPEG-XS-(HEIF)

JPEG-XS-(HEIF) Strengths

  • Provides sub-millisecond encoding and decoding latency while retaining visually lossless quality
  • Brings the extensive metadata, EXIF, XMP, and color-profiling capabilities of the HEIF container to JPEG XS
  • Allows grouping of multiple high-quality JPEG XS frames into a single collection file
Limitations
  • Zero web browser compatibility, limiting it entirely to professional and industrial hardware workflows
  • Extremely niche adoption compared to standard HEVC-based HEIC or raw JPEG XS codestreams
  • Requires custom parsing logic to extract the JPEG XS codestream from the HEIF boxes
Olympus-ORF

Olympus-ORF Strengths

  • Retains maximum sensor data, allowing extreme recovery of highlights and shadows that would be permanently lost in a JPEG
  • White balance, sharpening, and color profiling are saved as metadata instructions, meaning they can be completely altered in post-production
  • Unique magic byte signatures make programmatic file sniffing highly reliable compared to other camera manufacturers' TIFF-spoofing headers
Limitations
  • Proprietary format means it requires constant updates to raw processing engines every time a new camera model is released
  • Produces very large file sizes (often 15MB to 30MB+ per image depending on sensor resolution)
  • Cannot be directly embedded into web pages or used in standard HTML/CSS contexts

When to choose which format

JPEG-XS-(HEIF)
Use JPEG-XS-(HEIF) when…
  • Live Broadcast Infrastructure
  • Medical Imaging & Archival
  • Video over IP Networks
  • Automotive & Drone Systems
Olympus-ORF
Use Olympus-ORF when…
  • Professional Digital Photography
  • Non-destructive Image Post-Processing
  • High Dynamic Range (HDR) Imaging Archival

More comparisons

JPEG-XS-(HEIF) vs ACES → Olympus-ORF vs ACES → JPEG-XS-(HEIF) vs APNG → Olympus-ORF vs APNG → JPEG-XS-(HEIF) vs AVCI → Olympus-ORF vs AVCI → JPEG-XS-(HEIF) vs AVCS → Olympus-ORF vs AVCS → JPEG-XS-(HEIF) vs AVIF → Olympus-ORF vs AVIF → All comparisons →
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