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QEMU vs v86: catalog facts
QEMU	v86
Free Free and open source, with no paid edition.	Free Free and open source.
Windows, macOS, Linux, Command line	Web
Emulates whole machines across processor architectures, not just same-architecture VMs Near native performance when paired with KVM or Xen	Runs whole operating systems in a browser tab x86-to-WebAssembly JIT for better speed
Raw QEMU is a command line tool with a large and unfriendly option surface Cross-architecture emulation is far slower than virtualisation on matching hardware	Slower than native virtualization Best suited to older or lightweight operating systems
Downloadable app	Web application
Open source	Open source
License: GPL-2.0	License not stated
No account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 20, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.