BPS Super Mario Bros. 2 Patcher vs Floating IPS (Flips)

BPS Super Mario Bros. 2 Patcher is a free web page for applying a BPS patch to a Super Mario Bros. 2 ROM. It provides separate upload controls for an SMB2 ROM and a BPS patch, then an Apply patch button. The page validates both files and shows invalid-file messages when they are rejected. It supports only the NTSC version; the page says an invalid ROM may be a bad dump or the wrong region. During validation, the code checks iNES 1.0 and iNES 2.0 headers and can swap them as needed. It recognizes ROM and patch checksums for revisions 0 and A, and can apply a revision conversion patch. After patching, the script saves a .nes file named from the patch filename. The project links to GitHub source code containing BPS handling, ROM and hash code, revision patches, scripts and styles. The page credits Marc Robledo for Rom patcher JS.

Floating IPS (Flips) patches IPS and BPS files. It provides Windows and GTK+ graphical interfaces, command-line support, and a command-line-only build, and is listed for Linux, macOS, and Windows. The GUI can apply multiple patches to the same ROM and create multiple resulting ROMs. For BPS patches, it can remember earlier ROM choices and reuse one when it determines that it matches. The GUI can also launch another program after patching, allowing an emulator to start after a BPS file is patched. The project says Flips creates very small IPS patches and the smallest BPS patches of any known tool, and that it is faster than comparable creators. It is free and licensed under GNU General Public License version 3.0 or higher. The project is in maintenance mode: bug reports and pull requests will be read, but feature requests are unlikely to be implemented. GitHub marks the repository archived and read-only since May 21, 2025. Releases are automated for each commit, with an erratic schedule that can include identical releases.