Looking for a free Spritesheet Packer online?

Editors and Tools
#1

I’ve found these ones:

Convert the “JSON hash” generated with the tool above to .plist used in Cocos2d-x:
https://plassion.com/tools/json2plist.html (I’ve made this converter, if you find some error contact me).

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Another tool, Free Texture Packer, this one generates the .plist for Cocos2d-x:

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How to Create .plist file
#2

https://docs.cocos2d-x.org/cocos2d-x/v4/en/sprites/spritesheets.html