what is saroo-cover-editor fr?

This project is a small web page that lets you open, edit, and rebuild the cover-image files used by SAROO, a tool for Sega Saturn game discs. Those cover files, named cover.bin, hold the little box art thumbnails that SAROO shows for each game. Normally you would need a command line tool called covertool to work with these files, but this project rebuilds that same logic to run entirely inside your browser, so there is nothing to install and nothing to upload anywhere. Your files stay on your own computer the whole time. To use it, you just open the index.html file in a browser, either by double clicking it or dragging it into a browser window. From there you can load an existing cover.bin and see every cover it contains, or start a new empty set. You can add cover images one at a time or in a batch, edit details like the serial number or hash for each one, and download individual covers as PNG or BMP files. There is also a tool to compute a disc's identifying hash directly from a Saturn disc image file, matching what the original command line tool does. Once you are happy with your changes, you export a new cover.bin to download. The covers themselves have strict rules: they must be 8-bit images with a 256-color palette, and sized at either 128 by 192 or 128 by 128 pixels. If you add a full-color PNG, the tool automatically reduces its colors and resizes it to fit one of those two valid sizes. The README states that files produced here match the original command line tool byte for byte, so a cover.bin built in the browser should work exactly like one built with the original software. This is a narrow, hobbyist tool aimed at people already working with SAROO and Sega Saturn disc images, not a general purpose image editor. It is licensed under the GNU GPLv3.