chevron_right

PNG Transparency Cleaner

Clean noisy semi-transparent edges in PNG files. Threshold near-transparent pixels to fully transparent and near-opaque to fully opaque.

upload_file

Click to browse or drag & drop files here

Select a PNG

Accepted: image/png

Similar Tools

Convert PNG to AVIF

Convert PNG images to the modern AVIF format for much smaller file sizes.

Image Alpha Viewer

Inspect and download the alpha (transparency) channel of any image as a grayscale mask. Fully private, runs in your browser.

Auto Crop Transparent Pixels

Trim transparent borders from PNG images automatically. Detects the non-transparent bounding box and crops the image to it.

Convert BMP to PNG

Convert Windows bitmap (BMP) images to PNG for smaller files and better browser compatibility.

SVG Perspective Grid Generator

Generate one-point perspective grid SVGs with a customizable vanishing point. Create depth backgrounds, retrofuturistic scenes, and illustration overlays for free, no upload required.

SVG to PNG

Render an SVG file to a PNG image at any size, right in your browser.

Grainy Gradient Generator

Generate trendy grainy-noise gradient backgrounds as pure SVG with control over gradient type, stops, grain intensity, and texture scale.

apps

More Tools

Browse our full collection of free online tools.

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