# Grid Maker Pro

> A free, browser-only composition and drawing overlay tool. It draws 82 grids — rule of thirds, golden ratio, Loomis head construction, perspective, sacred geometry, dynamic symmetry, typography and architecture systems — over a reference picture the visitor loads from their own device. No account, no paid tier, and no upload: the image never leaves the browser, because there is no backend to send it to.

The pages below are the machine-readable surface. Every page on the site also has a
markdown rendering of itself at `{page url}index.md`, and the homepage returns it for
`Accept: text/markdown`.

## Data

- [Overlay catalogue](https://gridmakerpro.com/api/overlays.json): Every composition and drawing overlay Grid Maker Pro draws — 82 of them across 11 families, each with its page URL, its renderer id and a deep link that opens the tool with it on.
- [Composition glossary](https://gridmakerpro.com/api/glossary.json): 88 defined terms of composition, perspective and layout vocabulary, as schema.org DefinedTerm nodes.
- [Long-form guides](https://gridmakerpro.com/api/pillars.json): 39 long-form guides to composition, perspective, proportion and grid method, with their URLs and descriptions.
- [Reference photograph catalogue](https://gridmakerpro.com/api/references.json): 30 royalty-free reference photographs used to demonstrate the overlays, with their source URLs and licences.
- [Overlay line drawings](https://gridmakerpro.com/api/svg-signatures.json): One SVG line drawing per overlay — 82 of them, generated from the renderer itself, so each is the grid the tool actually draws.
- [Site index](https://gridmakerpro.com/search-index.json): Every page on the site — 485 of them — as {u, t, d, s}: URL, title, description and section.
- [OpenAPI description](https://gridmakerpro.com/api/openapi.json): every path above, as OpenAPI 3.1.
- [API catalogue](https://gridmakerpro.com/.well-known/api-catalog): the same list as an RFC 9727 linkset.

## Skills

- [overlay-catalog](https://gridmakerpro.com/.well-known/agent-skills/overlay-catalog/SKILL.md): Read Grid Maker Pro's overlay catalogue: the 82 composition and drawing grids it ships, their ids, pages and licence. Use when you need the list, or the id that addresses one.
- [grid-deep-links](https://gridmakerpro.com/.well-known/agent-skills/grid-deep-links/SKILL.md): Build a URL that opens the Grid Maker Pro tool with specific overlays already switched on, or read one back. Use when a person wants a grid over a picture.
- [choose-a-grid](https://gridmakerpro.com/.well-known/agent-skills/choose-a-grid/SKILL.md): Turn a described task — crop a photograph, scale a drawing onto a wall, lay out a page — into a specific overlay and the page that explains it.

## Using the tool

- [The tool](https://gridmakerpro.com/): open it with a grid already on — `?overlay={overlayId}`, comma-separated to stack.
- [Grid library](https://gridmakerpro.com/grid-library/): all 82 overlays, by family.
- [Guides](https://gridmakerpro.com/educational/): the long-form explanations.
- [Glossary](https://gridmakerpro.com/glossary/): the vocabulary.

## Licence

The catalogues are CC BY 4.0 — reuse them, including for model training, and credit
Grid Maker Pro (gridmakerpro.com). The reference photographs are third-party Unsplash
and Pexels images under those services' own terms.