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WinCDEmu vs UltraISO: catalog facts
WinCDEmu	UltraISO
Best for: Windows users who need to open disc images without burning them	Best for: Editing and converting ISO and other disc images on Windows
Free Free for any kind of use under the LGPL.	Paid Costs $29.95 USD, with a free trial available.
Windows	Windows
One-click mounting from Windows Explorer Handles ISO, CUE, NRG, MDS/MDF, CCD and IMG images All 4 strengths for WinCDEmu One-click mounting from Windows Explorer Handles ISO, CUE, NRG, MDS/MDF, CCD and IMG images Creates ISO images from the context menu Small installer, no reboot, portable version available	Edits ISO images directly without extracting and rebuilding Creates bootable CD and DVD images All 3 strengths for UltraISO Edits ISO images directly without extracting and rebuilding Creates bootable CD and DVD images Converts ISZ, DMG, DAA and UIF images to ISO
Windows only Official support listed only up to Windows 10	Paid license required after the trial Windows only All 3 limitations for UltraISO Paid license required after the trial Windows only Focused on optical disc images rather than USB drives
Downloadable app	Downloadable app
Open source	Not open source
License: LGPL-3.0	License: Proprietary
No account needed	Not stated if an account is needed
Offline features available	Offline features available
Official website Full listing and sources Sources for WinCDEmu wincdemu.sysprogs.org Catalog checked October 2, 2026	Official website Full listing and sources Sources for UltraISO ezbsystems.com/ultraiso Catalog checked October 2, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.