UNetbootin is a free, open-source utility that creates bootable USB drives for installing or trying Linux distributions and other operating systems, without needing to burn a physical disc. It can either download a selected Linux distribution automatically or use an ISO/IMG file you already have, and it runs on Windows, macOS, and Linux.
Why UNetbootin Was an Early Standard for Making Bootable USB Drives
Before bootable USB creation was common knowledge, UNetbootin was one of the first widely used tools to make it simple, letting users skip burning ISOs to CD entirely. Its built-in distribution list can fetch a chosen Linux distribution's installer directly, so a user does not even need to separately download an ISO file before creating the USB drive, which made it especially approachable for people trying Linux for the first time.
UNetbootin Features
- Direct Distribution Download — choose a Linux distribution from a built-in list and download it automatically.
- Load Local ISO/IMG Files — create a bootable USB from an ISO or IMG file you already have.
- Cross-Platform — runs natively on Windows, macOS, and Linux.
- USB and Floppy Support — write bootable images to USB drives or floppy disks.
- Persistent Storage Option — reserve space on the USB drive to save files and settings between boots (distribution-dependent).
- No Disc Burning Required — skip creating a bootable CD or DVD entirely.
- Open Source — free to inspect and modify, with source code publicly available.
- Lightweight Interface — a simple, single-window tool with minimal setup steps.
How to Install UNetbootin on Windows
- Open the official download page using the button on this page, which links to unetbootin.github.io.
- Download the installer or portable build for Windows, macOS, or Linux.
- Run UNetbootin — the Windows version does not require a separate install step.
- Insert a USB drive and choose it as the target, or select a local ISO file to use.
- Click OK to create the bootable USB and wait for the process to finish before removing the drive.
Is UNetbootin really free?
Open Source. UNetbootin is free, open-source software with no paid tier, ads, or bundled offers.
How to download UNetbootin safely
Use the request button on this page and we will email you the current link for unetbootin.github.io — the publisher's own website — so you receive the authentic build. We do not host, mirror, patch or repackage this software in any way.
Avoid third-party "download manager" sites offering UNetbootin. They commonly wrap the genuine installer in their own bundler, which is how adware and browser hijackers get onto a machine that the user believed was clean.
Alternatives to UNetbootin
Other free system utilities software worth comparing before you decide:
Rufus
A fast, free tool for creating bootable USB drives on Windows.
balenaEtcher
A free, open-source tool for flashing OS images to USB and SD cards.
Frequently asked questions
Is UNetbootin free to use?
Yes, UNetbootin is completely free and open source.
Does UNetbootin erase the USB drive I use?
Creating a bootable USB typically reformats the drive, so any existing data on it should be backed up first.
Can UNetbootin download a Linux distribution for me?
Yes, it includes a built-in list of popular Linux distributions it can download and write to USB automatically.
Can I use UNetbootin with an ISO file I already downloaded?
Yes, you can point UNetbootin at a local ISO or IMG file instead of using its built-in download list.
Does UNetbootin work on macOS and Linux, or only Windows?
It runs natively on Windows, macOS, and Linux.
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