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Image MIME Reference
DNG

Adobe Digital Negative

image/x-adobe-dng
VS

Khronos Texture

image/ktx
KTX

A complete technical comparison of Adobe Digital Negative and Khronos Texture — covering compression, feature support, browser compatibility, magic bytes, and when to choose each format.

Equal browser support

Feature Support

Feature DNG KTX
Transparency (Alpha) Yes Yes
Animation Support ✕ No ✕ No
Progressive Loading ✕ No ✕ No
HDR Support Yes Yes
EXIF Metadata Yes ✕ No
ICC Color Profile Yes ✕ No
Adobe Digital Negative
image/x-adobe-dng
Extension
.dng
Container TIFF/EP
Compression Lossless JPEG / Deflate / Lossy JPEG (DNG 1.4+)
Algorithm
Lossless JPEG (Standard)Lossy JPEG (Compression option)Uncompressed
Color Depth 12-bit, 14-bit, 16-bit, 32-bit (Floating Point HDR)
Developed by Adobe Systems
Released 2004
Magic Bytes
49 49 2A 00 or 4D 4D 00 2A
Full DNG reference →
Khronos Texture
image/ktx
Extension
.ktx
Container KTX (Khronos Texture 1.1)
Compression Uncompressed / GPU Compressed (ASTC, ETC, BCn, PVRTC)
Algorithm
ASTCETC1 / ETC2BCn (DXT)PVRTCBasis Universal (in KTX2)
Color Depth 8-bit, 16-bit, 32-bit (Integer/Float)
Developed by Khronos Group
Released 2010
Magic Bytes
AB 4B 54 58 20 31 31 BB 0D 0A 1A 0A
Full KTX reference →

Browser Support Comparison

Browser DNG KTX
Chrome Chrome
✕ ✕
Firefox Firefox
✕ ✕
Safari Safari
✕ ✕
Edge Edge
✕ ✕
IE IE (Legacy)
✕ ✕
DNG

DNG Strengths

  • Openly documented specification guarantees long-term archival accessibility, freeing photographers from proprietary manufacturer lock-in
  • Lossless compression algorithms often result in files 15-20% smaller than uncompressed proprietary raw formats
  • Natively supported by modern smartphone operating systems (iOS and Android) for high-end mobile photography
Limitations
  • Conversion from proprietary raw to DNG takes processing time and can strip specific, proprietary manufacturer metadata (like active D-Lighting or in-camera lens corrections)
  • File sizes are massive compared to standard JPEGs or HEIC files
  • Cannot be rendered natively in web browsers without server-side processing or WebAssembly decoders
KTX

KTX Strengths

  • Enables direct-to-GPU texture uploading, drastically reducing load times and CPU overhead in 3D applications
  • Supports complex texture types natively (mipmaps, cubemaps, 3D volumes, texture arrays)
  • Standardized across major Khronos APIs (OpenGL, Vulkan, WebGL) unlike vendor-specific formats like DDS
Limitations
  • Requires custom JavaScript loaders to parse and display on the web
  • Zero native support in consumer image viewers or 2D photo editing software
  • Format fragmentation: a KTX file containing an ASTC payload will fail to render on hardware that only supports BCn compression (KTX2 and Basis Universal solve this)

When to choose which format

DNG
Use DNG when…
  • Digital Photography Archival
  • Mobile Raw Capture (iOS ProRAW / Android Camera2 API)
  • Cross-Platform Raw Editing Workflows
KTX
Use KTX when…
  • Real-time 3D Graphics
  • WebGL / WebGPU Applications
  • Mobile Games
  • Virtual/Augmented Reality (VR/AR)

More comparisons

DNG vs ACES → KTX vs ACES → DNG vs APNG → KTX vs APNG → DNG vs AVCI → KTX vs AVCI → DNG vs AVCS → KTX vs AVCS → DNG vs AVIF → KTX vs AVIF → All comparisons →
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