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libguestfs

B
B tier on Virtual Drive SoftwareScore 7.1 · #3 of 23
Android app
Not listed
Free plan
Yes
Runs on
api, Linux, Mac, self-hosted, Windows
libguestfs.org
The libguestfs homepage
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Summary

libguestfs is a free library and toolset for accessing and modifying virtual machine disk images. It can view and edit guest files, script changes to VMs, create or resize images, make backups, clone machines and build VMs. The project says it can work with almost any disk image, including VMware and Hyper-V images, and with images created by VMware, KVM, qemu, VirtualBox, Xen and other hypervisors; libvirt is not required. Command-line users can use guestfish, a scriptable shell, or virt-rescue, an interactive rescue shell. The C library has bindings for many programming languages, with examples in C/C++, Erlang, Go, Java, Lua, OCaml, Perl, Python and Ruby. Guest filesystems are accessed through a Linux kernel in a qemu virtual machine, usually as a non-root user; sVirt with libvirt and SELinux can also be used. It runs on many Linux distributions and Mac OS X, while some virt tools have been ported to Windows. Non-Linux systems may require compiling from source and porting.

Who it is for

It suits developers and administrators who need to inspect or change virtual machine disk images, automate VM edits or build image-management workflows. Users on non-Linux systems should account for the need to compile from source and port it.

What is good

  • Free open-source library and tools.
  • Supports raw, qcow2, vmdk, vdi, vpc and vhd.
  • Works with images from several hypervisors without libvirt.
  • Includes scriptable and interactive command-line shells.
  • C bindings and examples cover many languages.

What to know first

  • Non-Linux systems may require source compilation and porting.
  • Windows support is limited to some virt tools being ported.

Verdict

libguestfs offers a broad set of disk-image tasks through both command-line tools and a library. It is a fit for technical workflows, with extra setup likely on non-Linux systems.

libguestfs plans and pricing

All plans
libguestfs Free Open source library and tools · source and binary downloads libguestfs.org · 29 Sept 2026

Compared on virtual drive software

Free plan
Yeslibguestfs.org
Image formats
raw, qcow2, vmdk, vdi, vpc, vhdlibguestfs.org
Virtual disk files
Yeslibguestfs.org
Optical image mounting
Yeslibguestfs.org
Supported platforms
Linux, Mac OS X; some virt tools have been ported to Windowslibguestfs.org

Facts

Purpose
libguestfs is a library and set of tools for accessing and modifying virtual machine disk images.libguestfs.org · 29 Sept 2026
Disk image tasks
It can view and edit guest files, script VM changes, create and resize images, perform backups, clone VMs, and build VMs.libguestfs.org · 29 Sept 2026
Image compatibility
The project says it can access almost any disk image, including images from VMware and Hyper-V.libguestfs.org · 29 Sept 2026
Security
It accesses guest filesystems through a Linux kernel in a qemu virtual machine, usually running as a non-root user, and can use sVirt with the libvirt backend and SELinux.libguestfs.org · 29 Sept 2026
Command line
The functionality is available through guestfish, a scriptable shell, and virt-rescue, an interactive rescue shell.libguestfs.org · 29 Sept 2026
Developer interfaces
libguestfs is a C library with bindings for many programming languages, and the site provides examples for C/C++, Erlang, Go, Java, Lua, OCaml, Perl, Python, and Ruby.libguestfs.org · 29 Sept 2026
Integration
The FAQ says libvirt is not required and libguestfs works with disk images created by VMware, KVM, qemu, VirtualBox, Xen, and other hypervisors.libguestfs.org · 29 Sept 2026
Downloads
The project provides source downloads and lists installation commands for Fedora, Red Hat Enterprise Linux, Debian, and Ubuntu.libguestfs.org · 29 Sept 2026
Supported systems
The FAQ says libguestfs runs on many Linux distributions and Mac OS X, while some virt tools have been ported to Windows.libguestfs.org · 29 Sept 2026
Support
Users can ask questions on the libguestfs mailing list or IRC channel #guestfs on Libera Chat; Red Hat Enterprise Linux customers are directed to Red Hat Support.libguestfs.org · 29 Sept 2026
Security reporting
The security guide directs private reports to Red Hat's security procedure and allows less serious issues to be filed as bugs or sent to the mailing list.libguestfs.org · 29 Sept 2026
Limit
The FAQ says non-Linux systems require compiling from source and porting libguestfs.libguestfs.org · 29 Sept 2026
Maker
The GitHub repository copyright notice names Red Hat Inc.github.com · 29 Sept 2026

Company

Founded
2009libguestfs.org · 28 Sept 2026

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