Tired of your album art having different aspect ratios? Want to make your music collection look more physical? Just nostalgic for the turn of the millennium? Meet jewelcase, a silly little program that transforms an image to look like it's printed and carefully slotted inside a CD jewel case.
Add an effect and save as a new file:
go run github.com/csmith/jewelcase/cmd/jewelcase@latest input.jpg output.jpgAdd an effect and save the file in-place
go run github.com/csmith/jewelcase/cmd/jewelcase@latest --inplace input.jpgFind all images recursively in a directory and add an effect to them all
go run github.com/csmith/jewelcase/cmd/jewelcase@latest --recursive ./folderBy default jewelcase won't process any images that are the exact size of its
output (884×777 pixels), so you can safely use --recursive across your entire
library repeatedly without ending up with jewel cases inside jewel cases.
You can override this behaviour by passing the --force parameter.
Use --quiet to suppress "skipped" messages when using --recursive:
go run github.com/csmith/jewelcase/cmd/jewelcase@latest --recursive --quiet ./folder| Example | Description |
|---|---|
 |
Original album art without jewel case |
 |
Jewel case with no effects applied |
 |
Colour adjustment (--colour=false to disable) |
 |
Rounded corners (--corners=false to disable) |
 |
Edge softening (--edges=false to disable) |
 |
Random offset (--offset=false to disable) |
 |
Random rotation (--rotation=false to disable) |
 |
Reflection effect (--reflection=false to disable) |
 |
All effects enabled (default) |
This project was primarily created with Claude Code, but with a strong guiding hand. It's not "vibe coded", but an LLM was still the primary author of most lines of code. I believe it meets the same sort of standards I'd aim for with hand-crafted code, but some slop may slip through. I understand if you prefer not to use LLM-created software, and welcome human-authored alternatives (I just don't personally have the time/motivation to do so).