Misc UO Region Editor 2026-05-25

Region Editor

Personal Note: I wont ever update a version here. This works good enough for me and im just sharing.

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Browser-based UO region editor, single HTML file, no install required​

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What is it?​

A standalone region editor for Ultima Online shards. Open it in any modern browser, load your map files, draw regions directly on the map, and export them in the format your server needs. Nothing to install,
the file runs entirely offline.

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Loading Your Map​

When you open the file a loader dialog appears. You have two options:
Load by folder: Point it at your UO client folder and it will auto-detect the right files for whichever map you select. This is the easiest way.
Load individual files: Manually pick each file if you want to mix and match. The tool expects:

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• map0.mul (or map1–5 depending on your facet)
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• radarcol.mul
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• statics0.mul + staidx0.mul

Map size is auto-detected from the file size, so custom/expanded maps work without any configuration. Supported facets: Felucca (map0), Trammel (map1), Ilshenar (map2), Malas (map3), Tokuno (map4), Ter Mur (map5).
No map files? Hit Demo Mode to try the editor with a placeholder map.

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Drawing Regions​

Two drawing modes, selectable from the toolbar:
RECT: Click and drag to draw a rectangle. A pending region panel appears in the sidebar showing the exact coordinates. Give it a name and click Save, or discard it.
POLY: This is not supported on any server and is a custom choice for me. Because I use this webapp myself.

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Export Formats​

Four export options at the bottom of the sidebar:

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Privacy / Safety​

The tool is entirely self-contained, one HTML file with no external dependencies, no CDN calls, no analytics, no tracking of any kind. Your map files are read locally by the browser and never leave your machine. Nothing is saved between sessions; if you close the tab your regions are gone, so export before closing.

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Requirements​

Any modern browser. Chrome and Firefox recommended for best canvas performance on large maps. No server, no Node, no installation.