Free webp to jpg
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Image MIME Reference
DXF

Drawing Exchange Format

image/vnd.dxf
VS

Apple PICT Image

image/x-pict
PICT

A complete technical comparison of Drawing Exchange Format and Apple PICT Image — covering compression, feature support, browser compatibility, magic bytes, and when to choose each format.

Equal browser support

Feature Support

Feature DXF PICT
Transparency (Alpha) Yes Yes
Animation Support ✕ No ✕ No
Progressive Loading ✕ No ✕ No
HDR Support ✕ No ✕ No
EXIF Metadata ✕ No ✕ No
ICC Color Profile ✕ No ✕ No
Drawing Exchange Format
image/vnd.dxf
Extension
.dxf
Container Text / Binary Container
Compression Uncompressed (ASCII) / Uncompressed (Binary)
Algorithm
None
Color Depth Vector (Indexed AutoCAD Colors / True Color)
Developed by Autodesk
Released 1982
Magic Bytes
30 0D 0A 53 45 43 54 49 4F 4E (ASCII) / 41 75 74 6F 43 41 44 20 42 69 6E 61 72 79 20 44 58 46 0D 0A 1A 00 (Binary)
Full DXF reference →
Apple PICT Image
image/x-pict
Extension
.pict.pct.pic
Container QuickDraw Metafile
Compression Uncompressed / Run-Length Encoding (RLE) / QuickTime Compressors (JPEG, SMC)
Algorithm
Apple PackBits (RLE)QuickTime Image Compression Manager (ICM)
Color Depth 1-bit, 2-bit, 4-bit, 8-bit (Indexed), 16-bit (High Color), 24-bit (True Color), 32-bit (RGBA)
Developed by Apple Computer, Inc.
Released 1984
Magic Bytes
None (Requires offset parsing, e.g., 00 11 02 FF at byte 522)
Full PICT reference →

Browser Support Comparison

Browser DXF PICT
Chrome Chrome
✕ ✕
Firefox Firefox
✕ ✕
Safari Safari
✕ ✕
Edge Edge
✕ ✕
IE IE (Legacy)
✕ ✕
DXF

DXF Strengths

  • Universally supported by almost every CAD program, 3D modeler, and vector graphics editor in existence
  • ASCII structure is human-readable and can be parsed or generated programmatically with relative ease
  • The de facto standard for sending 2D cutting paths to CNC routers, plasma cutters, and laser engravers
Limitations
  • ASCII DXF files can be enormously large and inefficient compared to binary DWG files
  • The format relies heavily on legacy AutoCAD data structures, making complex 3D entity parsing extremely difficult for third-party developers
  • Lacks native web browser rendering capabilities
PICT

PICT Strengths

  • Incredibly versatile for its time, allowing a single file to cleanly scale text and vector shapes while simultaneously housing raster photos
  • Served as the flawless universal clipboard format for the classic Mac OS, enabling seamless copy/pasting between wildly different applications
Limitations
  • Deeply tied to Apple's legacy QuickDraw graphics architecture, making it exceptionally difficult to write accurate third-party parsers on modern operating systems
  • Lack of a standard magic header makes file detection unreliable without seeking 522 bytes deep into the file
  • Completely unsupported in modern web environments and discontinued by Apple itself

When to choose which format

DXF
Use DXF when…
  • Cross-Platform CAD Data Exchange
  • CNC Machining and Laser Cutting Paths
  • PCB Design Outlines
  • Architectural 2D Layouts
PICT
Use PICT when…
  • Classic Mac OS Clipboard Data
  • Legacy Macintosh Desktop Publishing (Aldus PageMaker, QuarkXPress)
  • 1980s/1990s Digital Clip Art

More comparisons

DXF vs ACES → PICT vs ACES → DXF vs APNG → PICT vs APNG → DXF vs AVCI → PICT vs AVCI → DXF vs AVCS → PICT vs AVCS → DXF vs AVIF → PICT vs AVIF → All comparisons →
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