Pattern Utility — 1-Bit Pattern Editor Designed for OpenFront

Pattern Utility is a free, open-source 1-bit pattern editor for OpenFront. Design a pattern, preview how it looks in-game, and submit it for review — all from one place.

What you can do here

Draw with Pencil, Circle, Shape, Line, Fill and Shade tools, with a size slider that adapts to each tool.
Select part of your pattern to cut, copy, paste, shift, rotate or flip it.
Use the Test Canvas as a scratchpad while you work on the main pattern.
Preview your pattern against different scale sizes and colours before submitting.
Import/Export patterns as JSON (or copy the URL) — and when satisfied Submit your pattern.

⚠️ This tool is in beta. I can't guarantee stability, uptime, maintenance or permanence — but all links are backwards compatible and the code is open source.

Head over to the Guide, Controls or Links tabs for step-by-step testing instructions, keyboard shortcuts and useful resources.

💬 Feedback & Suggestions
Something broken or missing? Submit an issue or suggestion on GitHub Discussions.

Made with 🍫 by Aotumuri & BrayFlex

Final Testing & In-Game Preview Instructions:

In the pattern preview tool press the Console button (to copy Dev LocalStorage String)
Go to https://main.openfront.dev/
Right click on the page and select "Inspect" / or press F12
In the top bar of the Inspector click the "Console" tab
Directly paste into the console (after the >) the LocalStorage you copied.
Open a solo game and see how the pattern looks.

You can test your pattern at any point while drawing, and the basic preview updates live as you work.

Coloring

In Team Modes your primary colour is replaced, so make sure your secondary still stands out. Conversely, if most of your overall pattern is the secondary colour it may be confusing in team games.

You can test 2 Teams to see Red and Quads to see Orange/Yellow; use your better judgement for the other team colours.

Standards

Patterns below a minimum quality may be rejected and low effort patterns will be rejected.
Patterns that are too similar to existing patterns may be rejected.
Patterns that are too similar to the background or team colours may be rejected.
Patterns that are too confusing or similar to structures may be rejected.
Patterns with explicit content will be rejected.
Patterns containing letters or numbers are very likely to be rejected.
Patterns that are too close to copyrighted or trademarked designs will be rejected.

Keyboard Shortcuts

`Ctrl`/`Cmd` + `Z`	Undo
`Ctrl`/`Cmd` + `Shift` + `Z`	Redo
`Ctrl`/`Cmd` + `C`	Copy selection
`Ctrl`/`Cmd` + `X`	Cut selection
`Ctrl`/`Cmd` + `V`	Paste clipboard
`Ctrl`/`Cmd` + `D`	Deselect
`Backspace` / `Delete`	Clear selection
`Ctrl`/`Cmd` + `I`	Invert pixels (selection, or whole canvas)
`Shift` + `I`	Invert selection area
`Shift` (hold)	Temporarily switch into selection mode
`Space` / `Ctrl` (hold) + drag	Pan the canvas (grab hand)
`←↑↓→`	Pan the canvas by 5 cells
Mouse wheel	Zoom the canvas