When comparing GrafX2 vs PyxleOS, the Slant community recommends GrafX2 for most people. In the question“What are the best pixel art / sprite editors?” GrafX2 is ranked 3rd while PyxleOS is ranked 24th. The most important reason people chose GrafX2 is:
GrafX2 is scriptable using the Lua language, which can be used to automate tasks and add new functionality to it. The script library features advanced color reduction and enhancement tools, [palette analysis](http://eab.abime.net/showthread.php?t=76519), and much more.
Ranked in these QuestionsQuestion Ranking
Pro Scriptable using Lua
GrafX2 is scriptable using the Lua language, which can be used to automate tasks and add new functionality to it. The script library features advanced color reduction and enhancement tools, palette analysis, and much more.
Pro Supports many file formats
GrafX2 supports many file formats, including the popular gif and png, but also importing and exporting from deluxe paint, degas elite, and various other editors using custom formats.
Pro Palette color cycling
GraphX2 being based on older 256 bitmap software has inherited some tricks that modern pixel editors do not have . One of them being the ability to cycle color palette and produce animations and effects with it.
Pro Free, open source, and cross-platform
GrafX2 is totally free to use, copy, and modify. It's available on Windows, Linux, Mac OS X, Haiku, AROS, MorphOS, SkyOS, Syllable, Mint, and a few more systems. Basically anything is supported by the SDL library.
Pro Very large number of tools and effects
Pro Supports tileset addition and extraction
Pro Has a great palette tool
You can create gradients from one color to another, work in either RGB or HSL color space, save and load palettes, sort and organize palettes, and even work on "color cycling" images.
Pro Supports animations
The program has a basic support for animation using frames in newer versions. Graphics can be cloned and copied between frames and changed slightly.
See here how to animate with GrapfX2 https://www.youtube.com/watch?v=Gnq6zBZOqoM
Pro Has a customizable UI with themes support
Theme UI style can easily be changed from settings including buttons and colors.
Pro Drawing constraint mode for vintage 8bits machine
The program is able to enforce the pixel constraints of old machines (C64, ZX Spectrum, Apple II, Game Boy Color, etc.)
For example, in ZX Spectrum mode, only 2 different colors can be used in a 8x8 pixel block.
Pro Customizable UI
The user interface has support for color themes that are both built-in and user-definable. The canvas transparency tile can also be modified to the user's liking.
Pro Includes a useful text editor
PyxleOS features a basic text editor module that can be used for note-taking or modifying a file that follows encoding standards.
The size of the .jar binary is a little less than 1 MB, making the application very lightweight.
Pro Secure, Java-based cross platform binary
PyxleOS can be used on any OS that runs Java 8 and above.
Pro Free and open source
The download of PyxleOS is free and all source code is available at a public repository at GitHub.
Con Dated look and feel
It looks like it was never supposed to be used in the modern world.
Con Lack of modern features
Some modern features that are necessary to do pixel art creation for game dev work are lacking.
Con Undo/redo unavailable
Undo/redo functions are not available in PyxleOS.
Con Lacks a number of features
Due to it being relatively new software, PyxleOS is somewhat buggy and underfeatured.