.ISO File Extension
Full form: ISO Disc Image (International Organization for Standardization)
What is a .iso file?
An exact copy of a CD, DVD or Blu-ray stored as one file. Files that end with .iso belong to the system family of file types, so your computer links them with a suitable program automatically.
Where is .iso used?
Installing Windows or Linux and distributing software. Because the format is so common, almost every modern device and software understands it.
Examples of .iso file names
windows11.iso
How to open a .iso file
You can open it with: Rufus, Windows Explorer, VirtualBox. If it does not open, check that the file is not damaged and that you have downloaded it fully; also confirm that the extension was not renamed by mistake.
Quick tips
Never rename a file just to change its extension, because that does not convert the data inside. Use a proper converter or the Save As / Export option. Keep a backup copy of important system files before editing them.