Merge almost identical PNG colors and compare changed areas and file sizes.
Supported formats & limits PNG → PNG
For PNG screenshots, icons and graphics: merge nearly identical colors while preserving alpha and limiting each RGB channel change. It is not a general photo compressor. JPEG/WebP/AVIF belong in image optimization.
No payment or login required. No daily usage limits. Files are processed in your browser.
8-bit static PNG only. RGB tolerance applies to this same-size PNG step. Alpha is unchanged; translucent and transparent pixels stay untouched. This is a lossy color edit, not blur.
Up to 40 files; 64 MiB each, 192 MiB total; 16 million pixels per image, maximum side 10,000 px. Strict cleanup accepts PNG color types 0, 2, 3, 4 and 6 at 8 bits, without conflicting color tags. No HEIC, RAW, PSD or non-GIF animation.