There is no working, free Ioncube decoder on GitHub. Most repositories claiming to decode Ioncube are either:
A search for "ionCube decoder" on GitHub yields numerous repositories. These generally fall into three categories:
Instead of hunting for dangerous, non-existent tools, consider these legitimate alternatives: php+ioncube+decoder+github+free
Some repositories are nothing but a UI wrapper that forwards your encoded file to a paid online decoding service. They call themselves "free" but require API credits or external subscriptions.
A decoder in this context refers to any tool, software, or method capable of decoding or reverse-engineering IonCube-encoded PHP scripts. The existence and use of decoders raise questions about code protection, intellectual property rights, and the ethical implications of reverse-engineering. There is no working, free Ioncube decoder on GitHub
If you need to modify a script, email the developer. Many vendors provide a "developer license" or source code access for an additional fee (often $50–$200). This is cheaper than a data breach.
If you have legal ownership of the encoded files: They call themselves "free" but require API credits
It is highly unlikely that a functional, open-source decoder for the latest ionCube versions will appear on GitHub. The reasons are twofold: