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<br />CISO GUI (CISO is command line-based): Drag-and-drop ISO file on program, Select compression level (1 to 9 (Max)), "Compress", and choose directory for saving the new CSO file.
<br />UMDGen is a PSP ISO editor. You can save to either the CSO format with this.
→NKit formats - GC/Wii
* '''Playable on Hardware?''' NO
* '''Playable on Emulators?''' Yes - PCSX2.
==PlayStation 3==
===Extracted files (aka JB format/GAMES)===
* '''Archive-quality dump?''' Not directly (BD filesystem metadata lost).
* '''Gain:''' Immediate (any padding between files is removed).
* '''Tools Used:''' Most on-console file managers and *man homebrews, 7-Zip and other standard ISO extractors on PC.
* '''Can be reverted?''' Yes, using PS3 ISO Rebuilder and an [http://jonnysp.bplaced.net/ IRD file] representing the original file locations. Generic inaccurate JB to ISO conversions possible with makeps3iso (preferred) or genps3iso.
* '''Playable on Hardware?''' Yes - on CFW/HEN
* '''Playable on Emulators?''' ?
For a long time (before the availability of Cobra and Mamba) the only playable format for PS3 backups (relying on little more than "peek and poke" CFW-provided syscalls to mount the game's folder over the currently inserted disc) but also the least accurate one, with significant compatibility issues (varying on whether the backup is stored on an internal or external drive, whether an original game disc is currently inserted, various optional hacks such as "BDMirror" moving the files to the root of the external drive on demand, ...)
==PlayStation Portable==
* '''Gain:''' Immediate (ISO dump size lowers). Substantial, depending on game. Higher compression levels generally produce decreasing space gains while potentially increasing load times. Some tools allow for leaving audio/video content uncompressed.
* '''Tools Used:''' CISO, CISO GUI, maxcso, UMDGen, PSP ISO Compressor, CISO Multi Compressor, CISO XP, ...
* '''Can be reverted?''' Yes, using the same tools and saving in ISO (uncompressed) format. No data loss.
* '''Playable on Hardware?''' Yes - most CFWs (Possibly longer load times though).
* '''Playable on Emulators?''' Yes - PPSSPP.
CISO GUI and CISO XP: Drag-and-drop ISO file on program, Select compression level (1 to 9 (Max)), "Compress", and choose directory for saving the new CSO file.
UMDGen is a PSP ISO editor. You can save to either the CSO format with this.
===DAX, JSO, ZSO===
Official format for digitally distributed PSP/minis (partially related to the one used for PS1 games), containing a compressed disc image and optionally a custom boot logo.
==PlayStation Vita==
===Trimming===
* '''Archive-quality dump?''' No, but trivially undoable.
* '''Gain:''' Immediate (ROM size lowers).
* '''Tools Used:''' None - [https://github.com/motoharu-gosuto/psvgamesd#trimming-zeroes manual process]
* '''Can be reverted?''' Yes (see above).
* '''Playable on Hardware?''' Yes - with psvgamesd.
* '''Playable on Emulators?''' ?
The psvgamesd gamecard backup creation and mounting tools supports mounting a trimmed backup (although no tools exist for dumping directly in trimmed format, or converting between full and trimmed.
Neither variant of the .psv format (unrelated to the Cobra Blackfin's .psv format) has caught on, despite being the most accurate options for physical game backups.
===Extracted files (NoNpDRM format)===
* '''Archive-quality dump?''' No for physical titles, close enough (and generally accepted as such) but no cigar for digital ones.
* '''Gain:''' Immediate (compared to ROM).
* '''Tools Used:''' NoNpDRM plugin + a file manager like VitaShell.
* '''Can be reverted?''' No.
* '''Playable on Hardware?''' Yes - with the NoNpDRM plugin.
* '''Playable on Emulators?''' ?
NoNpDRM is a Vita plugin that generates decrypted licenses (valid for any console) when running an original Vita title, as well as allowing the system to accept those licenses, allowing for playing the encrypted files directly copied from a game card or memory card (by extension the name is therefore also used for such files, or the combination of the game's files and a decrypted license).
NoPsmDRM is the equivalent for PlayStation Mobile titles.
An hypothetical NoPspEmuDRM, allowing for PSP/PS1 eboots to be natively runnable and manageable from the LiveArea/Content Manager, is currently not known to exist nor believed to be in development.
==Dreamcast==
===NKit formats - GC/Wii===
* '''Archive-quality dump?''' Yes - by explicit design choice!
* '''Gain:''' Immediate or not depending on choice of - (Wii) only for GCZ- or ISO-based outputformat.
* '''Tools Used:''' NKit.
* '''Can be reverted?''' Yes!
Official Nintendo format for developers to install digital titles, later became the most popular format for installable homebrew and game backups owing to the relatively low marketshare of flashcards and emulators (and, for the former, strong impopularity) in favor of CFW.
Equivalent of the Wii's WAD (for digital titles only) and the DSi's TAD (again for digital titles only, and with basically no popular support due to the lack of any homebrew title installers supporting the format - not to be confused with an homonymous unofficial format nor with the files produced by the official export-DSiWare-to-SD feature)
===NCCHs (CXIs and CFAs, 3DS only)===
