Files with isz extension can be most often encountered as compressed disk image files from the makers of UltraISO. It's a somewhat rare file format and most programs do not support it.
Software that open isz file
ISZ file extension - UltraISO compressed disk image
What is isz file? How to open isz files?
File type specification:
Archive and compressed file type
Disk image (ISO) binary file type
isz file icon:
File extension isz is associated with a compressed disk image file format developed by EZB Systems, creators of the UltraISO application that is used as burning application and disk image manager.
The ISZ stands for "ISO Zipped". It is ISO disk image compressed by ZLIB or BZIP2 compression file format. ISZ file format also supports AES encryption. ISZ is public format and it can be opened in various third party applications.
Updated: January 12, 2025
The default software associated to open isz file:
Company or developer:
EZB Systems, Inc.
UltraISO is popular creating, editing and converting tool of ISO CD/DVD disk images. It allows users to directly edit ISO images, extract files from ISO images, create images from CD/DVD-ROM, create bootable ISO image etc.
UltraISO supports many ISO file formats such as ISO, BIN, IMG, CIF, NRG, BWI and so on. Also can converts them to standard ISO format.
Company or developer:
Alcohol Soft
Alcohol 120% is an optical disc authoring program and disk image emulator created by Alcohol Soft. Alcohol 120% supports a wide range of common CD/DVD images.
Company or developer:
DT Soft Ltd
DAEMON Tools is an advanced application for Microsoft Windows that offers users one of the best optical media emulation capability in the industry.
With DAEMON Tools you can convert your physical CD/DVD disks into "virtual disks" so called "images". It also can emulate up to 4 virtual CD/DVD drives, so you can mount (insert) and unmount (eject) images.
Company or developer:
CrystalIdea Software Inc.
AnyToISO is disk image converting tool. It is able to extract and convert variety of popular disk image formats, such as NRG, MDF, UIF, DMG, BIN, DAA to ISO disk image format. It is available in ten languages.
Company or developer:
CrystalIdea Software Inc.
AnyToISO for Mac is disk image converter. It is able to convert popular disk image formats, such as NRG, MDF, UIF, DMG, ISZ, BIN, DAA to ISO standard disk image format.
Company or developer:
DT Soft Ltd
DAEMON Tools for Mac is software solution for mounting CD/DVD/HDD disk images. It is able to mount *.b5t, *.b6t, *.bwt, *.ccd, *.cdi, *.bin/*.cue, *.ape/*.cue, *.flac/*.cue, *.iso, *.isz, *.mds/*.mdf, *.mdx, *.nrg, *.pdi, *.dmg, *.vhd files.
List of software applications associated to the .isz file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open isz file, edit isz file, convert isz file, view isz file, play isz file etc. (if exist software for corresponding action in File-Extensions.org's database).
Hint:
Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting isz files.
Software that open isz file - UltraISO compressed disk image
Programs supporting the exension isz on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about listed programs for open isz file action.
Microsoft Windows:
Main software associated with isz file by default:
UltraIso
Alcohol 120%
Daemon Tools
Other suggested software:
WinMount
PowerISO
Astroburn
