https://liberatedpixelcup.github.io/Universal-LPC-Spritesheet-Character-... has been completely rewritten and updated. Check it out!

Besides the new UI/UX, some new features:

 - Zoom sliders

 - Optional transparency checkered background

 - Replace mask (pink) is now toggled on and off via a checkbox and applied automatically

 - Credits and attribution section now shows exact filenames

 - Import / Export to clipboard saves / restores more state.

Technically, we've removed jQuery and lodash, added ES6 modules, and used the Mithril.js framework.

You can view the previous version for a short time (I think 90 days) at https://old-version--liberatedpixelcup.netlify.app for comparison.

Please submit your feedback and bug reports.