using JavaScript or WebAssembly, meaning your files are processed locally on your computer and never uploaded to a server. Rom Patcher JS

This comprehensive guide will walk you through everything you need to know about applying XDelta patches online, the limitations of browser-based patching, and the best tools to get the job done safely.

Applying an xDelta patch no longer requires downloading bulky software or messing with command-line interfaces. Thanks to modern web technologies, you can patch your files directly in your browser. Top Online XDelta Patchers The following tools run entirely in your browser

Click "Patch." Your browser may freeze for a few seconds (or minutes, depending on file size). This is normal—the CPU is crunching binary differences.