| Tool | Best For | Output Extension | GUI Available? | | :--- | :--- | :--- | :--- | | | ROM hacking (PSP, NDS, Switch), game mods | .xdelta | Yes (3rd party) | | DeltaPatcher | Modern, cross-platform patching with UI improvements | .xdelta , .bps | Yes (built-in) | | Floating IPS (FLIPS) | Older 16-bit ROMs (SNES, Genesis) | .bps , .ips | Yes | | BSDiff | Software binaries, executables | .bsdiff | Command-line only |
| Error Message | Likely Cause | Solution | | :--- | :--- | :--- | | | The original file is the wrong version, corrupted, or already modified. | Re-download a clean, unmodified original file. Ensure it matches the exact version the patch expects (e.g., v1.0, not v1.1). | | “Patch file is corrupted” | The .xdelta file was truncated during download or saved as an HTML error page. | Re-download the patch. Open it in Notepad; if it starts with <html> , you downloaded a 404 error page. | | “Not enough disk space” | The program needs space for the original, the patch, and the new output simultaneously. | Free up disk space or output the new file to a different drive with more room. | | “File not found” (even though you see it) | You have “Hide extensions for known file types” enabled in Windows. The file is actually game.nds.txt . | In File Explorer, go to View > Options > View tab and uncheck “Hide extensions for known file types.” | | Application hangs at 0% | Antivirus software is scanning the xdelta process in real-time. | Temporarily disable real-time protection (then re-enable after patching) or add XDelta Patcher to your antivirus exclusions list. | XDelta Patcher vs. Other Patchers While xdelta is popular, it is not the only binary diff tool. Here is a quick comparison: xdelta patcher download
Click the second “Browse” button (labeled “Patch” or “XDelta file”). Select the .xdelta file you downloaded from the modder or developer. | Tool | Best For | Output Extension | GUI Available
Click the large “Apply Patch” or “Patch” button. A progress bar will appear. For small files (<100MB), this is instant. For large files (4GB+), it may take 20–30 seconds as the program reads, compares, and writes binary data. Ensure it matches the exact version the patch expects (e