Free webp to jpg
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Image MIME Reference
Corel-CMX

Corel Metafile Exchange

image/x-cmx
VS

JPEG AI Image Sequence

image/jais
JPEG-AI-Sequence

A complete technical comparison of Corel Metafile Exchange and JPEG AI Image Sequence — covering compression, feature support, browser compatibility, magic bytes, and when to choose each format.

Equal browser support

Feature Support

Feature Corel-CMX JPEG-AI-Sequence
Transparency (Alpha) Yes Yes
Animation Support ✕ No Yes
Progressive Loading ✕ No Yes
HDR Support ✕ No Yes
EXIF Metadata ✕ No Yes
ICC Color Profile Yes Yes
Corel Metafile Exchange
image/x-cmx
Extension
.cmx
Container RIFF (Resource Interchange File Format)
Compression Uncompressed Vector Commands / Embedded Raster Compression (Optional)
Algorithm
None (Vector)
Color Depth Vector Data, Supports embedded bitmaps
Developed by Corel Corporation
Released Mid-1990s
Magic Bytes
52 49 46 46 (skip 4) 43 4D 58 31
Full Corel-CMX reference →
JPEG AI Image Sequence
image/jais
Extension
.jais
Container ISOBMFF / HEIF Image Sequence
Compression Lossy (Variational Autoencoder / Neural Network)
Algorithm
Deep Neural Network (Variational Autoencoder with Hyperpriors)
Color Depth 8-bit, 10-bit, 12-bit, 16-bit, Wide-gamut & HDR
Developed by Joint Photographic Experts Group (ISO/IEC JTC 1 / ITU-T)
Released 2025
Magic Bytes
.. .. .. .. 66 74 79 70 6A 61 69 73 (Size + ftypjais)
Full JPEG-AI-Sequence reference →

Browser Support Comparison

Browser Corel-CMX JPEG-AI-Sequence
Chrome Chrome
✕ ✕
Firefox Firefox
✕ ✕
Safari Safari
✕ ✕
Edge Edge
✕ ✕
IE IE (Legacy)
✕ ✕
Corel-CMX

Corel-CMX Strengths

  • Preserves rich vector attributes and layer groupings native to the Corel drawing engine better than standard WMF files
  • Significantly smaller footprint than full CDR project files, making it excellent for early CD-ROM clip art distribution
  • Maintains decent support in the open-source community thanks to libraries like libcdr
Limitations
  • Proprietary format strictly tied to Corel's ecosystem, often causing compatibility issues with Adobe software
  • Zero support in web browsers; must be converted to SVG for modern web usage
  • Largely obsolete for modern workflows, superseded by PDF and SVG
JPEG-AI-Sequence

JPEG-AI-Sequence Strengths

  • Extends the state-of-the-art compression efficiency of JPEG AI to multi-frame image sequences and short animations
  • Allows machine vision algorithms to process temporal sequences (like surveillance bursts) directly in the compressed latent domain, saving immense computational power
  • Utilizes the robust, industry-standard ISOBMFF container for metadata, timing, and multi-track encapsulation
Limitations
  • Lacks native decoding support in current web browsers, operating systems, and video players
  • Decoding neural-network-compressed sequences requires significant compute overhead on hardware lacking dedicated AI accelerators (NPUs/GPUs)
  • Adoption is hindered by competition with established sequence formats like AVIF, HEVC (HEICS), and modern video codecs

When to choose which format

Corel-CMX
Use Corel-CMX when…
  • Legacy CorelDRAW Clip Art Collections
  • Vector Graphic Exchange within Corel Suite
  • Historical Desktop Publishing Assets
JPEG-AI-Sequence
Use JPEG-AI-Sequence when…
  • Machine Vision and AI Video/Burst Workflows
  • Cloud Storage Animation Optimization
  • Focal Stacks and Medical Volumetric Slices
  • Visual Surveillance Sequences

More comparisons

Corel-CMX vs ACES → JPEG-AI-Sequence vs ACES → Corel-CMX vs APNG → JPEG-AI-Sequence vs APNG → Corel-CMX vs AVCI → JPEG-AI-Sequence vs AVCI → Corel-CMX vs AVCS → JPEG-AI-Sequence vs AVCS → Corel-CMX vs AVIF → JPEG-AI-Sequence vs AVIF → All comparisons →
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