WLEditor review

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

WLEditor is a desktop ROM editor for Super Mario Land 3, also known as Wario Land 1. It is aimed at people creating or modifying levels and overworld content for that specific game, rather than anyone looking for a general-purpose ROM editor. The project supports editing a valid WL1 ROM and can expand ROM space for level tiles.

Its scope reaches beyond level layouts: users can edit enemies, sectors, and warps, as well as world maps, overworld tiles, paths, and events. For tile selections, it provides copy, cut, paste, fill, erase, and pattern repetition, with undo and redo for edits. Tile data can also be imported and exported for external editing. That makes WLEditor a fit for projects involving both level and overworld changes; people seeking editing tools for other games will need a different product.

WLEditor is open source and has a free plan. It is specified for Windows x64 and requires the .NET Desktop Runtime 9.0, so platform and runtime requirements shape whether it fits a prospective user's setup. Its focused feature set favors Wario Land 1 level work over broad ROM workflows. Choose it if you want to edit this game's levels and world content on Windows; look elsewhere if you need a multi-game editor or support beyond Windows x64.

WLEditor pros and cons

• Where it wins
  • Edits level tiles, enemies, sectors, and warps
  • Covers world maps, overworld paths, and events
  • Includes tile operations, undo and redo, and tile data import/export
• Where it doesn't
  • Limited to Super Mario Land 3 / Wario Land 1 ROMs
  • Available for Windows x64 only
  • Requires the .NET Desktop Runtime 9.0

WLEditor fact sheet, pricing and score →

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Last updated 21 Oct 2026 · How we research and update