Ventoy: A Bootable USB Tool That Skips the Formatting Cycle

The Problem: Formatting a USB Drive for Every ISO

The usual way to make a bootable USB drive is to flash a single ISO to it, which erases the drive. If you need another operating system, you format the drive again and flash the next ISO. Ventoy removes that cycle. You install Ventoy once onto a USB drive, then copy ISO, WIM, IMG, VHD(x), or EFI files onto the remaining space. The drive becomes a boot menu. You can carry dozens of images on one stick and select which one to boot at startup. This solves a real pain for system administrators, IT support staff, and anyone who maintains multiple live environments or installers.

How Ventoy Works: A Bootloader That Reads Image Files

Ventoy is not a flashing tool. It is a bootloader plus a partitioning scheme. During installation, it creates a boot partition and a data partition on the USB drive. The data partition can be FAT32, exFAT, NTFS, UDF, XFS, Btrfs, or ext2/3/4, according to the README. After installation, you simply copy image files into the data partition. The bootloader scans that partition at boot time and presents a menu of the images it finds. Because the images are stored as regular files, they do not need to be contiguous on disk. This is a key design difference from older multi-boot tools that required contiguous files or special preparation. The boot process supports x86 Legacy BIOS, IA32 UEFI, x86_64 UEFI, ARM64 UEFI, and MIPS64EL UEFI. It also handles both MBR and GPT partition styles. The bootloader is written in C, and the project is released under GPL-3.0.

Getting Started: Install Once, Then Copy Files

The README does not give explicit command-line instructions, but the workflow is clear from the project description. You download the Ventoy release, run the installer on your host system, and select the target USB drive. The installer writes the bootloader and creates the partitions. After that, you treat the data partition like any other storage. Copy your ISO files into it. No further formatting is needed when you add new images. The project also mentions VentoyPlugson, a GUI plugin configurator, and a browser feature that lets you browse and boot image files from local disks, not just the USB drive. For advanced use, there are plugins for Linux persistence, Windows auto-installation, and Linux auto-installation. These features are documented on the official website, but the README does not include the exact plugin syntax. You would need to consult the website documentation for those details.

What It Supports: A Wide Net with Limits

The README lists an enormous number of tested operating systems: Windows 7 through 11, Windows Server 2012 through 2025, WinPE, dozens of Linux distributions including Debian, Ubuntu, Fedora, Arch, Gentoo, and niche ones like Damn Small Linux and TempleOS. Unix systems like FreeBSD and pfSense are there, as are ChromeOS variants and hypervisor tools like VMware ESXi and Xen. The project claims 1300+ ISO files tested and 90%+ of distrowatch.com distributions supported. That breadth is the main selling point. But the list is not a guarantee. The README says 'most types' are supported, not all. For any ISO not on the tested list, you must try it yourself. The project maintains an issue tracker for reporting successful tests, which suggests that compatibility is not universal. Some images, especially those with unusual bootloaders or proprietary formats, may fail to boot.

A Real Limitation: Secure Boot and Firmware Quirks

Secure Boot is supported for IA32 and x86_64 UEFI, but only from version 1.0.07 onward. The README does not describe how Ventoy handles Secure Boot keys or whether it requires disabling Secure Boot in all cases. In practice, Secure Boot support often means the bootloader is signed or uses a shim, but the details are not in the README. Another limitation is that Ventoy boots images as files, which works for live environments and installers, but some operating systems may behave differently when booted from a virtual CD-ROM or a RAM disk than from a real physical disk. For example, Windows installation might not detect the USB drive as a valid target during setup, depending on the image and firmware. The README does not mention these edge cases, but they are common in multi-boot tools. You should test your specific hardware and image combination before relying on Ventoy in a critical situation.

Alternative: Traditional Flashing Tools

The most direct alternative is a tool like Rufus or balenaEtcher, which writes a single ISO directly to a USB drive. The difference in approach is fundamental. A flashing tool creates a bootable disk by writing the image's filesystem layout onto the USB drive, overwriting everything. Ventoy keeps the image as a file on a standard filesystem and uses its own bootloader to read it. Flashing is simpler and more compatible with obscure images because the boot process is exactly what the original ISO expects. But flashing requires a separate USB drive for each image, or repeated formatting. Ventoy trades that simplicity for the convenience of storing many images on one drive. If you only need one or two ISOs and never change them, a flashing tool is lighter and less likely to hit compatibility surprises. If you juggle many images, Ventoy's file-copy model is more efficient.

Maintenance and Upgrade Cost

The project is actively maintained, with releases v1.1.15, v1.1.16, and v1.1.17 appearing in June and July 2026. Upgrading Ventoy typically means running the new installer on the USB drive again, which may or may not preserve the data partition. The README does not specify whether upgrades are non-destructive, so you should back up your image files before upgrading. The license is GPL-3.0, which means you can use, modify, and redistribute the source code, but any derivative work must also be GPL-3.0. This is a strong copyleft license. If you embed Ventoy in a commercial product, you must make your modifications available under the same license. The project is open source and the repository is public, so you can track changes and report issues. The maintenance cost is low for a user: you just copy new ISO files to the drive, but you should occasionally check for new releases to get bug fixes and new firmware support.

Editorial conclusion

Adopt Ventoy if you regularly handle many bootable images and want a single USB drive that works across Legacy BIOS and multiple UEFI architectures. Avoid it if you need to boot images that are not on the tested list, especially proprietary or niche tools, or if your target machine has unusual firmware quirks. Before relying on it for production, verify that your specific ISO works by checking the official tested list and running a real boot test on your hardware. Ventoy is GPL-3.0, so you can inspect and modify it, but you must share any derivative works under the same license.

Official sources

1. Official documentation
2. Official README
3. Project repository
4. Release notes