Jon Sneyers

Hi! I'm Jon, and this is my home page. Welcome!

Painted portrait of Jon


I was born in 1981, in Leuven, Belgium. I have a PhD in Computer Science from KU Leuven. Since 2016, I work for Cloudinary, doing research related to image processing and compression. Currently I live in Asse, Belgium, with my better half and three wonderful daughters.

Image Compression


In JPEG, I co-chair the JPEG XL adhoc group. JPEG XL is based on a combination of Google's PIK and Cloudinary's FUIF. Free and open-source JPEG XL reference software is available.


Together with Pieter Wuille, I created the Free Lossless Image Format (FLIF).

Check out my blog posts on the Cloudinary blog.


I've been a vegetarian for about 25 years. Not that I particularly like animals, or want to save the planet (that would be nice, but I don't think consumer boycotts are the best way to do that). It's just that to my sense of gastronomy, the concept of putting animal corpses on a plate has never been appetizing, even when the carcass has been cooked or otherwise processed.

Red stylized fist Politics

I am a democratic socialist, inspired by the political analyses of a.o. Marx and Trotsky. Since 2003, I'm a member of the Belgian section LSP-PSL of International Socialist Alternative (ISA).


I amateurishly . I also make stuff in Amiga-style trackers.

Some songs I wrote:



21 Feb 2012


11 Sept 2013


1 July 2015


I'm a non-militant atheist.

Flying Spaghetti Monster


Some games I wrote for the Pandora:

Old stuff

Here are some links to old/outdated pages:

xkcd comic on digital data degradation


I wrote a book. It's an epic optimistic-dystopian feminist pornographic hard-SF adventure, written in Dutch (~95k words). If you're a publisher (or screenwriter) and interested in translating (or adapting) it, please contact me.


The easiest way to contact me is via Twitter (@jonsneyers). Alternatively, you can email me ( if it's related to image compression, otherwise). I have accounts on linkedin and facebook but rarely check them.


This page was made with a plain old text editor, just me typing some HTML and CSS. If anything is wrong with it, or can be improved, feel free to let me know.

Tweets by jonsneyers
Tweets by jonsneyers