copy.sh is a website which lets you emulate a VM online in your browser.
You can run:
| Arch Linux 12 MB | A complete Arch Linux restored from a snapshot, additional files are loaded as needed |
| D Small Linux 50 MB | Graphical Linux with 2.4 kernel, Firefox 2.0 and more. Takes 1 minute to boot. |
| Buildroot Linux 5.0 MB | Minimal Linux with busybox, Lua, tests, internet access, ping, telnet and curl. Exchange files through /mnt/. |
| ReactOS 18 MB | Windows-compatible OS. Restored from snapshot |
| Windows 2000 24 MB | Including Pinball and Internet Explorer with internet access. Additional sectors are loaded as needed. |
| Windows 98 9.7 MB | Including Minesweeper and Internet Explorer with internet access. Additional sectors are loaded as needed. |
| Windows 95 4.6 MB | Restored from snapshot |
| Windows 3.1 15 MB | Takes 15 seconds to boot |
| Windows 1.01 0.6 MB | Takes 1 second to boot |
| MS-DOS 6.22 4.4 MB | With Enhanced Tools, QBasic, vim, games and demos. |
| FreeDOS 0.5 MB | With nasm, vim, debug.com, Rogue, some games and demos. |
| FreeBSD 17 MB | FreeBSD 12.0 base install. Restored from snapshot. |
| OpenBSD 12 MB | OpenBSD 6.6 base install. Restored from snapshot. |
| 9front 4.4 MB | A Plan 9 fork. |
| Haiku 46 MB | Restored from snapshot. Includes network support. |
| Oberon 1.2 MB | Native Oberon 2.3.6 |
| KolibriOS 1.4 MB | Fast graphical OS written in Assembly |
| QNX 1.3 MB | QNX 4.05 Demo disk (no networking) |
| Snowdrop 0.3 MB | A homebrew operating system from scratch, written in assembly language |
| Solar OS 0.3 MB | Simple graphical OS |
| Bootchess 512 B | A tiny chess program written in the boot sector |
| SectorLISP 512 B | A LISP interpreter that fits into the boot sector |
It saves the OS for later use in your web browser cookies! You can restore the os with no problem whenever you want because the os is stored inside a cookie.
There is a lot of OSes to choose from, including some old ones.
On the custom VM side, you can select an image and boot directly from your web browser.