Tech riderRev. 21 Sept 2026
- 1Runs onWeb
- 2CostsNot stated by the maker
- 3Supported platformsWeb
- 4Source availableYes
- 5Built-in debuggerYes
4 lines stated Written from the maker's own pages: miracle.xania.org
Overview
Miracle is ranked #18 of 25 in Sega master system emulators on Specifiction. It runs on Web.
Compared on Sega master system emulators
- Free plan
- Yesmiracle.xania.org
- Supported platforms
- Webmiracle.xania.org
- Source available
- Yesmiracle.xania.org
- Built-in debugger
- Yesmiracle.xania.org
Facts
- Purpose
- Miracle is a JavaScript Sega Master System emulator that runs in a browser.miracle.xania.org · 7 Oct 2026
- Debugger
- The emulator includes a built-in debugger that opens with Backspace.miracle.xania.org · 7 Oct 2026
- Controls
- The cursor keys and Z/Y and X control the emulator; P pauses it and R resets it.miracle.xania.org · 7 Oct 2026
- ROM loading
- Users can open a ROM file in the browser or select a listed game.miracle.xania.org · 7 Oct 2026
- Emulator controls
- The interface provides Play, Pause, Step, Step Over, Step Out, and Reset controls.miracle.xania.org · 7 Oct 2026
- License
- The maker describes Miracle as free software under the GNU General Public License, version 3 or later.miracle.xania.org · 7 Oct 2026
- Warranty
- The maker states that the program is provided without warranty, including implied warranties of merchantability or fitness for a particular purpose.miracle.xania.org · 7 Oct 2026
- Project lineage
- Miracle is based on JSSpeccy, which in turn is based on Fuse.miracle.xania.org · 7 Oct 2026
- Build requirement
- The project README says building requires Node.js version 18 or later.github.com · 7 Oct 2026
- CPU test suite
- The project README reports 1,329 of 1,356 FUSE Z80 CPU tests passing and says the 27 skipped tests cover behaviors not relevant to SMS emulation.github.com · 7 Oct 2026
- Product
- Miracle is a JavaScript Sega Master System emulator that runs inside a browser.miracle.xania.org · 7 Oct 2026
- ROMs
- The page lets users open a ROM file or select a listed game.miracle.xania.org · 7 Oct 2026
- Debugger controls
- The interface includes play, pause, step, step over, step out, reset, and open ROM controls.miracle.xania.org · 7 Oct 2026
- Maker
- The page credits Matt Godbolt as the maker.miracle.xania.org · 7 Oct 2026
- Credits
- Miracle is based on JSSpeccy by Matt Westcott, which in turn is based on Fuse by Philip Kendall and others.miracle.xania.org · 7 Oct 2026
- Platform
- The product is described as running totally inside a browser.miracle.xania.org · 7 Oct 2026
- Source code
- The public repository says Miracle can be tried at miracle.xania.org and documents building it with Node.js v18 or later.github.com · 7 Oct 2026
- Emulation tests
- The repository says 1,329 of 1,356 FUSE Z80 CPU tests pass and identifies 27 skipped tests as covering undocumented behavior not relevant to SMS emulation.github.com · 7 Oct 2026
Best Miracle alternatives
See all 20 All accessCh 01 Virtual Jaguar Free planAndroidiOS Free to start7.8 All accessCh 02 Gearlynx AndroidAPI 7.4 All accessCh 03 MasterGear Free planAndroidLinux Free to start7.3 All accessCh 04 Emulicious Free planLinuxMac Free to start7.1 All accessCh 05 Genesis Plus GX Free planLinuxWindows Free to start7.1 All accessCh 06 ares Free planLinuxMac Free to start7.0
Where it ranks on Specifiction
Is Miracle yours?
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Sources
- miracle.xania.org· checked 7 Oct 2026
- github.com/mattgodbolt/Miracle· checked 7 Oct 2026