piskelapp/piskel is an editor for making game sprites and pixel art animations in a web browser. The latest release recorded in the repository is v0.15.0. However, the provided materials do not state what changed in this version, so no new features or fixes can be identified. According to the README summary, this editor is the same editor used by the piskelapp.com service. That makes it a project you can look at alongside the web service and the repository editor.
This tool is used to edit sprites and pixel art in the browser. It targets the work of creating images and animations for games, and it also uses libraries to generate animated GIFs and to import GIFs. The README summary explains that the implementation language is JavaScript and that it was built with nothing but HTML and CSS. It is stated to support the latest Chrome, Firefox, and Edge, so it is worth a look if you prefer working in the browser instead of a separate desktop editor. The repository's license is Apache-2.0.
Brave is not included in the list of supported browsers. The README summary advises that you must turn off canvas fingerprinting blocking in Brave for it to work, so if you need to keep that setting, it may not meet your usage requirements. Since the provided materials contain no changelog for v0.15.0, it is hard to judge what this release improved over previous versions. Until the changes are confirmed, it is more reasonable to judge the editor by its purpose and browser requirements than by the differences in the current version.