Creator tools for macOS and Windows
Native companions to the RollNo9 editor — for the work that belongs on your own machine. Free to download, and everything you make comes back as a kit you can use.
Kit Creator
v0.0.1Draw the tiles. It works out how they fit together.
Kit Creator is a desktop tool for building the tile kits a 2D platformer runs on. Start from a working kit, replace the placeholder art with your own, watch it autotile in a live level as you paint, and export a package your engine can load. You never hand-author a rule table — every group already knows how its tiles join.
Download
15 August 2026macOS
110.2 MB · macOS 11.0+
114.5 MB · macOS 11.0+
Windows
90.1 MB · Windows 10/11 x64
89.8 MB · Windows 10/11 x64
These builds are not code-signed yet. macOS will say the developer is unidentified — right-click the app and choose Open the first time. Windows will show a SmartScreen warning; choose More info → Run anyway.
What it does
Start from something that already works
Every new kit opens with a complete, paintable tile set. Nothing is blank, so you can see the shape of the thing you are replacing before you draw a line.
Ten tiling styles, no rules to write
Pick how a group should behave and it handles the joins for you — corners, edges, caps and 1-wide runs included.
Paint a real level while you work
The World tab is a live level, not a swatch preview. Tiles autotile as they land and touching strokes merge, so a bad join shows up in seconds.
Replace art at whatever scale suits you
Export a group sheet as a PNG, paint over it, import it back on an exact grid. Or drop a single image on one tile. Or keep editing the file — saves are picked up.
Variants and weights
Give any slot several versions and set how often each is picked, so ground and walls stop looking stamped. Weight zero makes a variant hand-placed only.
Re-skin without redrawing
A kit can hold several skins — the same groups, different art. Switch skins from the toolbar and the whole level re-renders.
Export a package your engine can read
One .zip: a config.json plus a folder per group with tiles.json and one PNG per tile, each written exactly once — no sheets, no duplicates.
Joining rules ship with the art
Each group carries a 16-entry lookup table mapping every neighbour combination to the slot to draw, so your engine looks the answer up.
Ten tiling styles
| Style | For |
|---|---|
| Region (9-grid) | Blobs that autotile their own edges — dirt islands, walls, ore |
| Region (9-grid extended) | The same, plus 1-tile-high runs and the lone tile |
| Bush (foliage) | An extended region that starts from scalloped foliage art |
| Horizontal run | Platforms, fences, clouds, ledges |
| Vertical run | Ladders, chains, vines, pipes |
| Scatter objects | Props dropped one per cell, picked by weight |
| Ground terrain | The sculpted, walkable heightmap with slopes |
| Liquid | Finds its own level and fills basins down to the ground |
| Curved path | Bridges, cables and ropes strung along a drawn curve |
| Multi-tile prop | Trees and rocks placed as one block |
A look inside
Everything in the kit, at a glance
Every group with a live preview of its current art. Duplicate for a re-skinnable copy, or open one to edit its tiles.
The tile editor
Each cell is labelled with the role it plays. Drop an image on any tile, or export the whole sheet, paint over it and import it back.
Pick a behaviour, get a working set
Choose how the group should tile. You get a placeholder set that already joins correctly, ready to repaint.
Starter art, fully re-colourable
The Bush template ships scalloped foliage recoloured to whatever you pick — then it behaves like any other group.
First run
Open a recent project or start a new kit.
Why it's useful if you draw
- You draw tiles, not rules. No bitmask tables, no adjacency spreadsheets.
- You see the mistake immediately — bad seams show up in a painted level, not after integration.
- Your tools stay your tools. Photoshop, Procreate, Aseprite — it imports PNGs and re-reads on save.
- Nothing is thrown away. Placeholder art is a full-resolution tracing guide.
- Re-colouring is not re-drawing. One set of shapes ships as grass, snow and lava.
- Handoff is a zip — the art and the joining rules in one file.
The details
- Version
- 0.0.1 — first release, 15 August 2026
- Tile size
- Set per kit; the bundled starter kit is 1024px
- Export
- Single .zip; one PNG per tile, written once
- Projects
- A .kitproj folder — kit.json, master sheet per skin, world.json
- Platforms
- macOS 11.0+ (Apple Silicon and Intel), Windows 10/11 x64
Release notes
v0.0.1 15 August 2026
- Kit editor: groups arranged by draw layer, per-tile art import, painted-sheet import/export, per-slot variants and weights.
- World preview: paint groups onto a generated world, autotiling live, undo, per-group and whole-world clear.
- Tiling styles: region (9-grid), region extended, Bush foliage starter set, horizontal/vertical runs, scatter objects, ground terrain, liquid, curved path, multi-tile props.
- Export: single .zip game kit — config.json plus a folder per group with tiles.json and one PNG per tile, with a 16-entry neighbour→slot lookup table.
- Multi-skin kits; stamp groups capped by a tile-size-aware pixel budget.
Everything you make lands in your account
Build a kit on the desktop, use it in the browser editor the same minute.
Create your free account