The 8 best free apps to run bootable ISOs from your flash drive

Nowadays, technology has become a part of our lives and our needs are constantly changing, especially when it comes to computers and software. When we need to install or run an operating system, booting from a USB stick has become almost the norm. 

Especially if you have an ISO file ready to use, being able to “load” it from your flash drive is more convenient than ever. For most, this may seem complicated, but fortunately there are many free applications that can simplify this process and make our lives easier.

In my experience, choosing the right app can make all the difference — not only in how quickly you can set up your USB, but also in how easy the process is to use.

In the following article we will present you with the 8 best free applications that will help you run bootable ISOs from your flash drive. 

CONTENTS

• 1️⃣windy
• 2️⃣Rufus
• 3️⃣Sardu
• 4️⃣YUMI Multiboot USB Creator
• 5️⃣RMPreUNetbootinp
• 6️⃣ISO to USB
• 7️⃣UNetbootin
• 8️⃣ Etcher

windy

1.

The windy is an innovative tool for creating bootable USB without the need to format the disk every time you want to add a new ISO file. Its innovation lies in the fact that you simply copy the ISO files to the USB and Ventoy automatically recognizes them at boot time. It supports multiple operating systems and is ideal for users who want to keep multiple distributions on a single USB drive.

Specifications

1️⃣ Support for multiple ISO files
2️⃣ Requires no configuration after initial installation
3️⃣ Open source and free
4️⃣ UEFI and Legacy BIOS support
5️⃣ Compatible with Windows, Linux and other operating systems

Advantages

🟢 1️⃣ Very easy to use – just copy the ISOs
🟢 2️⃣ Supports a large number of ISO files
🟢 3️⃣ No need to rewrite the USB every time
🟢 4️⃣ Open source and constantly improving

Disadvantages

🔴 1️⃣ Does not support all ISOs (some specialized distributions may have problems)
🔴 2️⃣ May not be fully compatible with some older motherboards

Rufus

2.

Program with the help of which we can make bootable USB disks from ISO images. Of course, if you have an ISO image, then you could burn it to a CD or DVD, but this will not help much if the computer you want to run the image does not have a CD-DVD Drive. Besides, USB is much easier to carry, difficult to damage and of course much faster.

Specifications

1️⃣ Quickly create bootable USB
2️⃣ BIOS and UEFI support
3️⃣ Support for many ISO file types
4️⃣ Compatible with Windows and Linux ISO
5️⃣ No installation – portable application

Advantages

🟢 1️⃣ Very fast in creating bootable USB
🟢 2️⃣ UEFI and GPT support
🟢 3️⃣ Free and open source
🟢 4️⃣ Easy to use

Disadvantages

🔴 1️⃣ Does not support multiple ISOs on the same USB
🔴 2️⃣ It does not have a graphical interface for novice users

Sardu

3.

The Sardu is a powerful tool that allows you to create multiboot USB with multiple operating systems, diagnostic tools and live CDs. It is ideal for technicians who need multiple systems on one USB.

Specifications

1️⃣ Support for multiple ISO files
2️⃣ Built-in diagnostic and recovery tools
3️⃣ Compatibility with Windows and Linux
4️⃣ UEFI and Legacy BIOS support
5️⃣ Available in free and paid version

Advantages

🟢 1️⃣ Ideal for technicians and IT professionals
🟢 2️⃣ Support for multiple operating systems
🟢 3️⃣ Includes diagnostic and recovery tools

Disadvantages

🔴 1️⃣ Full version requires payment
🔴 2️⃣ It can be complicated for beginners

YUMI Multiboot USB Creator

4.

The YUMI (Your Universal Multiboot Installer) is one of the most flexible tools for creating USB multiboot, allowing the installation of multiple operating systems, antivirus utilities, rescue disks, and other tools on a single USB drive. It is especially useful for technicians who need to mount multiple ISO files on a single device.

Specifications

1️⃣ Support for multiple ISO files
2️⃣ Compatible with Windows, Linux and diagnostic tools
3️⃣ UEFI and Legacy BIOS support (in later versions)
4️⃣ Ability to add and delete ISO files without formatting the USB
5️⃣ Available in a free version

Advantages

🟢 1️⃣ Ideal for multiboot setups with operating and diagnostic tools
🟢 2️⃣ Easy to use and with a simple user interface
🟢 3️⃣ Supports a wide range of ISO files
🟢 4️⃣ Does not require formatting every time you add new ISO

Disadvantages

🔴 1️⃣ Sometimes it can have problems with UEFI
🔴 2️⃣ Support for some ISOs is not as good as in Ventoy

RMPrepUSB

5.

Completely free program that you can use to enable USB drives, hard drives, SD cards, or almost any external storage device and make it bootable to load either from an ISO or from a fully installed partition on a drive.

Specifications

1️⃣ Support for multiple file systems (FAT32, NTFS, exFAT, etc.)
2️⃣ Support for multiple bootloaders (GRUB, Syslinux, Windows Bootloader)
3️⃣ Built-in USB testing and management tools
4️⃣ Advanced settings for custom launches
5️⃣ UEFI and Legacy BIOS support

Advantages

🟢 1️⃣ Very powerful and flexible for advanced settings
🟢 2️⃣ Supports many types of bootloaders
🟢 3️⃣ Includes USB testing and diagnostic tools

Disadvantages

🔴 1️⃣ Complicated for beginners
🔴 2️⃣ Less user-friendly interface

ISO to USB

6.

The ISO to USB is a simple and lightweight tool that allows creating bootable USB from ISO files. It is ideal for beginner users, but it has limited capabilities compared to other applications.

Specifications

1️⃣ Easy and fast ISO to bootable USB conversion
2️⃣ Support for FAT32 and NTFS file systems
3️⃣ Free and no installation requirements
4️⃣ Compatible with Windows ISO files
5️⃣ Does not support multiple ISOs on the same USB

Advantages

🟢 1️⃣ Very easy to use, ideal for beginners
🟢 2️⃣ Light and fast
🟢 3️⃣ Free and simple

Disadvantages

🔴 1️⃣ Does not support multiboot
🔴 2️⃣ Limited support for various ISO types

UNetbootin

7.

A popular tool that allows you to create bootable USB drives for Linux distributions, as well as some versions of Windows. It is especially useful for Linux users who want to create bootable USB drives quickly and easily.

Specifications

1️⃣ Support for Linux and Windows ISO files
2️⃣ Ability to download Linux distributions directly from the application
3️⃣ Compatible with BIOS but not fully with UEFI
4️⃣ Free and cross-platform (Windows, Linux, MacOS)
5️⃣ Does not require formatting the USB each time

Advantages

🟢 1️⃣ Ideal for Linux users
🟢 2️⃣ Simple and lightweight
🟢 3️⃣ Allows direct download of Linux distributions from the internet

Disadvantages

🔴 1️⃣ No full support for UEFI
🔴 2️⃣ Sometimes it doesn't recognize certain ISOs correctly

Etcher

8.

The Etcher is a modern and easy-to-use tool for creating bootable USB. It is particularly user friendly, with a clean environment and maintains its credibility thanks to the verification of registrations.

Specifications

1️⃣ Easy and friendly user interface
2️⃣ Support for Windows, Linux and macOS
3️⃣ Automatic data verification after registration
4️⃣ Support for USB and SD cards
5️⃣ Open source and free

Advantages

🟢 1️⃣ Very easy to use and fast
🟢 2️⃣ Supports multiple platforms
🟢 3️⃣ Verify data to avoid errors

Disadvantages

🔴 1️⃣ Does not support multiboot
🔴 2️⃣ Sometimes it's slower than Rufus

Comparative analysis 

Application	multiBoot	UEFI	Speed	Ease of use	Free
windy	✅	✅	⭐⭐⭐	⭐⭐⭐⭐	✅
Rufus	❌	✅	⭐⭐⭐⭐	⭐⭐⭐	✅
Sardu	✅	✅	⭐⭐⭐	⭐⭐	❌ (limited)
YUMI	✅	✅	⭐⭐⭐	⭐⭐⭐	✅
RMPrepUSB	❌	✅	⭐⭐⭐	⭐	✅
ISO to USB	❌	❌	⭐⭐	⭐⭐⭐⭐	✅
UNetbootin	❌	❌	⭐⭐⭐	⭐⭐⭐	✅
Etcher	❌	✅	⭐⭐⭐	⭐⭐⭐⭐	✅

• Best for multiple ISOs: Ventoy, YUMI, SARDU
• Best for quick bootable USB creation: Rufus, Etcher
• Best for beginners: Etcher, ISO to USB
• Best for Linux: UNetbootin

✍️ Evangelos
Its creator LoveForTechnology.net — an independent and trusted source for tech guides, tools, and practical solutions. Each article is based on personal testing, evidence-based research, and care for the average user. Here, technology is presented simply and clearly.

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