PNG Transparency Cleaner

Clean up the semi-transparent fringing and noise that often surrounds exported PNG assets. The tool applies two thresholds to the alpha channel: any pixel below the low threshold becomes fully transparent, any pixel above the high threshold becomes fully opaque, and pixels in between keep their smooth alpha for clean anti-aliased edges.

Features

• Independent low and high alpha thresholds
• Preserves smooth alpha in the middle range
• Transparent-checkerboard preview
• 100% local processing

Use cases

• Clean up sticker exports
• Remove halos from chromakey results
• Tighten edges on cut-out portraits
• Prepare assets for sprite atlases