I'm improving performance and quality of images on the web

kornel has 2 patrons.
Donate   Credit/Debit Card Direct Debit PayPal


I've created and maintain several open-source projects. Some of them, like pngquant and MozJPEG, power many 3rd party tools and services that save huge amounts of bandwidth worldwide.

  • pngquant and libimagequant

    The best possible widely-compatible compression of images with an alpha channel.

  • ImageOptim app & ImageAlpha

    GUIs making image optimization easy and convenient

  • Sblam!

    A free web service for filtering out spam in web forms (blocking HTTP spambots) transparently to the users and accessible to screen readers.

  • lossy animgif + gifski encoder

    Halving bandwidth of the Internet cat traffic.

  • Sparkle

    Auto-updater for non-Appstore (and thus DRM-free) Mac apps.

I'm also maintaining several libraries and tools for the Rust programming language.

Linked Accounts

kornel owns the following accounts on other platforms:


dssim 884 Updated 3 weeks ago

Image similarity comparison simulating human perception (multiscale SSIM in Rust)

pngquant 4495 Updated 3 weeks ago

Lossy PNG compressor — pngquant command based on libimagequant library

dupe-krill 158 Updated 1 month ago

A fast file deduplicator

lodepng-rust 92 Updated 2 months ago

All-in-one PNG image encoder/decoder in pure Rust

rust-lcms2 24 Updated 2 months ago

ICC color profiles in Rust

http-cache-semantics 210 Updated 8 months ago

RFC 7234 in JavaScript. Parses HTTP headers to correctly compute cacheability of responses, even in complex cases

slip 2444 Updated 1 year ago

Slip.js — UI library for manipulating lists via swipe and drag gestures

undither 37 Updated 2 years ago

Smart filter to remove Floyd-Steinberg dithering from paletted images


kornel joined 5 years ago.

kornel does not disclose how much they receive through Liberapay.