About this release
UltraISO is the small utility that treats a disc image as something you edit rather than only burn. Open an ISO and its contents appear like a folder, so you drag files in, pull files out, rename and delete inside the image, and save it back without unpacking and rebuilding the whole thing. For patching an installer set or trimming an image before you write it, that direct editing is the entire reason it stays installed.
The other half is making media. It writes a bootable USB stick from an ISO with the boot sector set correctly, so an operating system installer or a rescue tool boots straight from the stick, and it burns to a disc where the hardware still exists. It converts between the common image formats, mounts an image as a virtual drive so the contents are readable without burning anything, and creates a fresh image from a folder or a physical disc.
It is tiny, quick and undemanding, and it runs as a normal install or a portable build off a stick. This is the premium edition, which unlocks the larger image handling, the bootable media creation and the format conversion that the trial holds back, prepared here to set up in an activated state.
What it does
- Direct editing of an ISO with drag in and drag out of files
- Bootable USB creation with the boot sector set correctly
- Disc burning where optical hardware is present
- Conversion between the common disc image formats
- Mounting an image as a virtual drive to read without burning
- Creating a fresh image from a folder or a physical disc
- Boot information extraction and injection for custom media
- Handling of images larger than a single disc
- Portable operation from a USB stick
- Command line support for scripted image tasks
Changes in this version
- Improved bootable USB compatibility with current firmware
- Better handling of very large image files
- Updated virtual drive mounting for recent Windows builds
- Faster format conversion on large images
- Refreshed the interface language set
What the package contains
- UltraISO Premium Edition installer
- Portable build alongside the installer
- Virtual drive component
- All interface languages
- Readme with the install order written out step by step
Installation notes
Follow these in order. Most reports of a failed install come from skipping a step rather than from the package itself.
- Extract the archive to any folder you like.
- Run the installer, or unzip the portable build and run it in place.
- Apply the included activation step on first launch.
- Install the virtual drive component if you want to mount images.
- Open the application and confirm it opens a sample image.
- Turn off the update check so the activation state is left alone.
System requirements
| Operating system | Windows 7 or newer, 32-bit or 64-bit |
| Processor | Any 1 GHz or faster processor |
| Memory | 512 MB minimum |
| Graphics | No requirement |
| Storage | 30 MB plus space for the images you work with |
| Display | 1024 by 768 minimum |
Things worth knowing
- Writing a bootable stick erases it, move anything off the target first.
- For an operating system installer, match the boot mode, some firmware wants UEFI and some legacy.
- The portable build is convenient but the virtual drive feature needs the installed component.
Questions about this title
Can I edit an ISO without rebuilding it?
Will the bootable stick boot any firmware?
Do I need to burn a disc to read an image?
What does the premium edition add?
What people are saying
Wrote a Windows installer to a stick in one step and it booted straight away. Does the one job I need perfectly.
Dragged a driver into an installer image and saved it back without rebuilding. Nothing else does that so simply.
Twelve megabytes and it has outlived every bloated alternative I tried. Runs off a stick too.
Listing information
This entry is catalogued under Utilities & Tools and carries the tags below. Language coverage is Multilingual, 40 interface languages, and the supported platform list is Windows 7, Windows 8.1, Windows 10, Windows 11. Version 9.7.6.3860 is the current catalogued build, last checked 1 week ago, and the entry has been in the index since it was added 3 years ago.