I understand you're looking for a guide on applying an XDelta patch — but just to be clear, you cannot apply an XDelta patch purely "online" (i.e., inside a web browser without downloading files).
While this article focuses on applying patches, the same "new" online tools also let you create patches. This is revolutionary for modders. apply xdelta patch online new
URL: hackmaster.app/patch
Built specifically for the ROM hacking community, this tool integrates a database of known CRC hashes. When you apply an XDelta patch online new using HackMaster, it automatically detects if you have the wrong version of the base ROM (e.g., Rev 1 vs Rev 0) and suggests the correct one. I understand you're looking for a guide on
Chunked Stream Processing:
Your files never leave your computer. The patching happens locally within your browser's memory, making it nearly as fast as desktop software without any installation. github.com How the "Story" Typically Plays Out for a User: The Discovery: Patches can be large (megabytes to gigabytes) Processing