Open-source browser-based bbox layout builder for MOSS-Image, fully offline with JSON export

Rex-Racer9 · reddit · 2026-11-13

A developer released another free open-source bbox layout builder for MOSS-Image that runs in any modern browser, 100% offline with no ComfyUI, Python or network calls. Features: dynamic canvas that scales to any window while keeping aspect ratio and megapixel presets; color-coded MOSS-native text/object/character items with drag-and-drop cards; private local reference background images with adjustable opacity; meta tags and palette management with a Danbooru/anime focus; export to JSON or plain-text prompt with JSON stripped (for refining in Krea 2), plus JSON import with dimension matching. An online demo is available.

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