Game Boy Tile Tool
A downloadable tool for Windows and macOS
Most guides for developing your own Game Boy games will point you towards Game Boy Tile Designer and Game Boy Map Builder for working with tiles. Unfortunately, these tools are from the 90s, dated, and are hard to run on Mac machines.
That's where Game Boy Tile Tool comes in. You can draw multiple tiles, lay them out on the map builder, and then export them to a GBDK-compatible C source code file which is copied to your clipboard. You can also drag a generated C source code file back into the editor to automatically load that tile sheet and map back into the editor to continue working on.
This tool is open source under the MIT license. Contribute to it on GitHub.
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Would this by any chance work well with GB Studio?
I haven’t used GB Studio very much, but I don’t think it has a way to import the hexadecimal format that this outputs.
I could theoretically implement a way to export to JPEG, but if you want a JPEG it’s probably easier to use just about any other fully featured image editing tool.
I could see some use for backgrounds, but Tiled works well and is still maintained.
This is really just intended to support GBDK because the only tool recommended for generating the kind of byte code you need for GBDK sprites hasn’t been updated for literal decades.
That being said, the code for this is open source and if someone implemented a way to export the sprite sheet in a format that works with GB Studio, I would definitely merge it in.