Lönn
Lönn: A free, open-source editor focused on building and modifying Celeste maps. Ranked #16 of 28 in Game Level Editors by our editors (7.5/10); pricing: Free plan; best for editing Celeste maps.
At a glance
- Editor score7.5 / 10
- PricingFree plan
- Best forEditing Celeste maps
- Free planYes
- Paid fromFree
- Level dimensions2d
- Facts checked20 Sep 2026
Where it wins
- Creates rooms and edits existing Celeste map binaries
- Supports tiles, objects, entities, layers, and stylegrounds
- Free, open-source desktop software with Everest integration
Where it doesn't
- Focused specifically on Celeste map creation
- Everest is recommended for loading custom maps
- Unofficial fan-made project rather than an official Celeste tool
Our verdict on Lönn
Lönn is an open-source visual map maker and level editor for Celeste. It is designed for creators who want to edit existing map binaries or build new maps and rooms. The editor supports placing and editing game objects and entities, painting foreground and background tiles with brushes, and saving maps for use in the stock game or with Everest. Desktop packages are available for Windows and macOS, with packages and launch instructions for Linux and other operating systems.
Lönn’s main strength is the breadth of its Celeste-focused editing tools. Users can select, move, resize, rotate, and flip objects; configure layers and layer groups; edit stylegrounds; and undo or redo editing actions. This gives map creators control over both room structure and visual presentation rather than limiting the tool to tile placement. Plugins provide a way to extend the editor’s functionality, while the project’s open-source model keeps the software free to use.
The ecosystem fit is centered on Celeste and Everest. Lönn can save maps for the stock game, while Everest is the listed integration and is recommended for loading custom maps. That makes the editor a focused choice for Celeste creators rather than a general-purpose level design tool. Choose Lönn if you need a free desktop editor for Celeste maps, including binary editing, entity placement, tile painting, layers, and stylegrounds. Consider another tool if your work is outside Celeste or requires a broader, multi-game editing workflow.
Your product? Our editors can test Lönn in depth and publish a review, labelled as paid · from $149/mo →
Lönn pricing
Lönn fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Level dimensions | 2d |
| Tilemap tools | Yes |
| Terrain tools | Not verified |
| Entity placement | Yes |
| Prefab or template tools | Not verified |
| Visual scripting | Not verified |
| Deployment | Desktop |
| Platforms | Windows, macOS, Linux |
| Support | Community, Docs |
| Built for | Solo, Small business (editorial estimate) |
| Integrations | 1 integrations: Everest |
| Pricing | Free plan |
| Website | github.com |
| Facts checked | 20 Sep 2026 |
Lönn integrations
Lönn lists 1 integrations on its own site.
- Everest
Alternatives to Lönn
- GridCraftA capable collaborative map editor with broad exports, but paid plans start at 19.99.9.4
- TiledA flexible 2D editor with deep tile, object, terrain and export support.9.2
- LDtkA capable free editor for structured 2D levels across major engines and desktop platforms.9.0
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The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used Lönn for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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