MONOCHROME+ Image Tool

Built for the Fjalldata 2026 competition

Conversion tool and C64 6510 code by Raistlin/G*P
Fast sprite-coverage algorithm by Christopher Jam
Exomizer by Zagon
ClaudeAI was used to develop this tool

Click or drag & drop a 320x200 PNG image here

Image must contain exactly 2-3 C64 colors

Output

Color Configuration

Border Color Screen edge ($D020)

Border Only

Base Color 1 Most common color

Bitmap Color 1

Base Color 2 Second bitmap color

Bitmap Color 2

Extra Color Third color (MONO+63 / sprites)

Colour 3

Use Exomizer-style compression (smaller file size)

Debug Information

MONOCHROME+

Output

Detected Colors

Base Image (2 colors)

Sprite Layer (3rd color)

Sprite Coordinates