C64 Graphics Explorer

Inspect and enjoy Commodore 64 images with an authentic look. This app shows images using an authentic CRT filter and a loupe to explore all the multicolor glory!

Download for macOS

Requires macOS 14.0 or later

C64 Graphics Explorer screenshot showing CRT simulation and palette mapping

Built for the C64 community

Intelligent Palette Mapping

CIEDE2000 color matching with Hungarian algorithm for optimal mapping to the C64's 16-color palette.

Authentic CRT Simulation

Pepto's Colodore filter with scanlines, Hanover bars, chroma subsampling, and configurable gamma.

Pixel-Perfect Loupe

Magnifying loupe with 8×8 character grid overlay. Reveals background and multicolor info per cell.

Mode Detection

Automatically detects Hires (≤2 colors/cell) and Multicolor (≤4 colors/cell) modes.

Built-in Gallery

Curated collection of C64 artwork with artist credits. Drag & drop your own images too.

Manual Palette Swap

Click palette swatches to manually adjust color mappings when automatic matching needs tweaking.

Keyboard shortcuts

Toggle original/remapped view Space
Toggle Grid/CRT mode Q
Toggle loupe W
Adjust grid alignment ← ↑ ↓ →
Reset grid alignment R