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v86 vs PCjs: catalog facts
v86	PCjs
Free Free and open source.	Free Free to use in the browser, with source published on GitHub.
Web	Web
Runs whole operating systems in a browser tab x86-to-WebAssembly JIT for better speed	Runs vintage DOS, Windows and OS/2 machines with no installation Works on desktop and mobile browsers, including iPhone and iPad
Slower than native virtualization Best suited to older or lightweight operating systems	Limited to a curated set of machines and configurations Emulates slow period hardware, not suited to modern workloads
Web application	Web application
Open source	Open source
License not stated	License not stated
No account needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 1, 2026

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