QEMU vs JSLinux: catalog facts
 QEMU |  JSLinux |
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Free Free and open source, with no paid edition. |
Free Free to use in the browser. |
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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
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- Runs entirely in the browser with nothing to install
- Covers x86, x86_64 and RISC-V systems
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- 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
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- Slower than a native virtual machine
- Some systems have long boot times
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Downloadable app |
Web application |
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Open source |
Closed source |
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License: GPL-2.0 |
License not stated |
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No account needed |
No account needed |
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Works offline |
Needs internet |
Checked September 20, 2026 | Checked September 23, 2026 |
Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.
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