SMILE
SMILE: A focused Windows editor for Super Metroid rooms, game elements, and IPS patches. Ranked #9 of 49 in ROM Hacking Tools by our editors (6.6/10); pricing: Free plan; best for editing Super Metroid rooms and IPS patches.
At a glance
- Editor score6.6 / 10
- PricingFree plan
- Best forEditing Super Metroid rooms and IPS patches
- Free planYes
- Paid fromNone
- ROM editingYes
- Facts checked5 Oct 2026
Where it wins
- Edits rooms, tiles, enemies, PLMs, and doors visually
- Includes palette, map, tileset, and graphics editing
- SMILE RF creates and applies IPS patches
Where it doesn't
- Supports Super Metroid rather than a range of games
- Available for Windows only
- Original SMILE development is discontinued
Our verdict on SMILE
SMILE is a fan-made desktop editor for modifying Super Metroid, aimed at solo ROM hackers focused on that game. Its visual tools cover room layouts and tiles, with additional editors for enemies, PLMs, doors, palettes, maps, tilesets, and graphics. It is a specialized utility rather than a general-purpose ROM editor, so its appeal depends on working specifically with Super Metroid and on Windows.
The editing scope reaches beyond room layout: documented capabilities include room data and properties, message boxes, and Mode 7 scenes. That makes SMILE relevant to hackers changing both the structure and presentation of game areas. The feature set is specific to one title, though, and the listed category specifications do not include a hex editor. Those looking for a multi-game tool or hex-based editing should consider a different editor.
Patch work is part of the workflow through SMILE RF, which creates and applies IPS patches; that capability is documented for the RF variant rather than necessarily every SMILE release. SMILE is free, and its download-based desktop format suits a solo creator who wants direct editing tools without a hosted service. The original SMILE is described as discontinued in development, while community variants and guides are available through Metroid Construction. Choose it for focused Super Metroid editing and IPS patching; skip it if you need active original development, another operating system, or broader game support.
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SMILE pricing
SMILE fact sheet
| Free plan | Yes |
|---|---|
| Paid from | None |
| ROM editing | Yes |
| Patch formats | IPS |
| Tile/sprite editing | Yes |
| Hex editor | No |
| Supported platforms | Windows |
| Game scope | Specific game |
| Deployment | Desktop |
| Platforms | Windows |
| Support | Docs, Community |
| Built for | Solo (editorial estimate) |
| Pricing | Free plan |
| Website | metroidconstruction.com |
| Facts checked | 5 Oct 2026 |
Alternatives to SMILE
- YY-CHRA focused Windows dot editor for viewing and editing graphics in retro-game ROMs.8.4
- NUPSA free Windows desktop utility focused on creating and applying UPS patches.7.3
- HxDA broad Windows hex editor for binary work, rather than a ROM-specific hacking suite.7.2
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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