🖨️ Halftone Generator

Upload an image to generate a transparent halftone suitable for print-on-demand or screen printing.

Input Image

Crop Black Background

Automatically removes near-black borders around the image (useful for AI-generated images with dark padding).

Crop Threshold

Pixels with all RGB channels below this value are treated as black background. Higher = more aggressive cropping.

0 255

Black Point

Shadows darker than this become pure black (transparent). Raise to deepen shadows and remove faint noise.

0 255

White Point

Highlights brighter than this become pure white (fully opaque). Lower to brighten the overall image.

0 255

Gamma

Controls midtone brightness. <1 = darker midtones, >1 = lighter midtones. Works like the middle slider in Photoshop Levels.

0.1 3

Invert for Dark Garment

Flips the tonal values so the design prints correctly on dark fabric (light ink on dark background).

Method

'halftone' uses a classic dot screen pattern. 'diffusion' uses Floyd-Steinberg error diffusion for a more organic, grain-like texture.

halftone diffusion

Screen Frequency (LPI)

Lines per inch — controls dot density. Lower = bigger, more visible dots. Higher = finer, subtler pattern. 25-45 is typical for garment printing.

5 100

Screen Angle (°)

Rotation of the dot grid. 22.5° or 45° are common choices to avoid moiré artifacts. Only applies to 'halftone' method.

0 90

Dot Shape

'round' produces classic circular halftone dots. 'line' produces parallel-line screening (engraving look). Only applies to 'halftone' method.

round line

Output (transparent PNG)