# Panelcraft

> Shape a page. Arrange a book. Give your story a voice. Panelcraft is a free comic-book studio that keeps your work on your device. Arrange a story across editable pages, build panel layouts with artwork, speech balloons and screentones, and stage original posed mannequin references. Export clean pages, a book contact sheet, lettering CSV and an editable project you can carry between devices.

Panelcraft (Comic books & figure references) is a premium app of usefulweb.site (https://usefulweb.site/): a full program that runs in the browser. Its engine is deterministic and the same functions are exposed as tools, so an agent can compute exactly what the app shows.

## Use it
- Landing page: https://panelcraft.usefulweb.site/
- Workspace (browser app): https://panelcraft.usefulweb.site/app - open a project with https://panelcraft.usefulweb.site/app#project=<base64url-encoded project JSON> or a template with https://panelcraft.usefulweb.site/app#template=<id>
- Project file format (JSON Schema): https://panelcraft.usefulweb.site/project.schema.json
- Tutorials: https://panelcraft.usefulweb.site/tutorials
- JSON API: POST https://panelcraft.usefulweb.site/api/v1/tools/<toolId>/calculate (catalog: https://panelcraft.usefulweb.site/api/v1/tools)
- OpenAPI: https://panelcraft.usefulweb.site/openapi.json
- MCP (Streamable HTTP): https://panelcraft.usefulweb.site/mcp

## Engine tools
- [Comic Book & Booklet Planner](https://panelcraftbookplan.usefulweb.site/): Plan a multi-page comic, contact sheet and folded booklet order. API: POST https://panelcraft.usefulweb.site/api/v1/tools/panelcraft-book-plan/calculate · MCP tool `panelcraft_book_plan`
- [Posed Figure Reference Maker](https://panelcraftfigurereference.usefulweb.site/): Create a stylized posed mannequin, drawing reference and reusable 3D scene. API: POST https://panelcraft.usefulweb.site/api/v1/tools/panelcraft-figure-reference/calculate · MCP tool `panelcraft_figure_reference`
- [Comic Page & Lettering Planner](https://fliplinecomicpage.usefulweb.site/): Plan comic panels, reading order and dialogue in an editable page. API: POST https://panelcraft.usefulweb.site/api/v1/tools/flipline-comic-page/calculate · MCP tool `flipline_comic_page`
- [Screentone Pattern Maker](https://fliplinescreentone.usefulweb.site/): Make dot, line and crosshatch tones with explicit pitch, coverage and print scale. API: POST https://panelcraft.usefulweb.site/api/v1/tools/flipline-screentone/calculate · MCP tool `flipline_screentone`

## Formats
- Import: Panelcraft book JSON, Flipline Comic Desk page JSON, Flipline screentone recipe JSON, PNG / JPEG / WebP panel images, Figure reference recipe JSON
- Export: Panelcraft book JSON, Full-size comic page PNG, Comic page SVG with physical dimensions, Book contact-sheet PNG / SVG, Book lettering CSV, Booklet order JSON, Figure reference PNG / SVG / OBJ / recipe JSON

## Limits
- Books contain 1–12 pages and at most 24 million embedded characters. Each page retains the Comic Desk limits: 12 panels, 36 balloons and 6 megapixels.
- Panel artwork is a snapshot. Continue detailed painting in Flipline or Lumina and reimport the image.
- System-font lettering uses estimated glyph widths; review the exported art before print. No font embedding, CMYK separation or exact typography guarantee. Bleed export repeats the outermost page pixels; it cannot add artwork beyond the page edge.
- Contact sheets are overviews up to 8 megapixels. The booklet tool plans page order rather than producing an imposed press PDF.
- Figure references are original low-poly drawing aids. They do not recreate anatomical scans, MakeHuman assets, skeletal animation or rigged character exports.