Open a Tiled file

GridCraft reads .tmx (XML), .tmj (JSON), and .json Tiled map files. External tilesets in .tsx and .tsj are picked up automatically when the map references them.

From the browser

1. Open gridcraft.dev/editor.
2. Click File → Open and pick the .tmx (or .tmj) file.
3. If the map references external tilesets or images, GridCraft asks you to pick them so it can resolve the references.

From the desktop app

Drag a .tmx, .tmj, or .grc straight onto the window, or use File → Open. The desktop build reads from the local file system directly, so external tilesets and images resolve from their paths on disk.

What survives the round-trip

Everything Tiled writes. Layers, tilesets, objects, animations, properties, Wang sets, AutoMap markers. When a map only uses features Tiled understands, GridCraft saves a standard .tmx or .tmj that Tiled opens directly, with GridCraft-only fields riding along as extra attributes Tiled ignores. Features Tiled can't represent (variable and oversize tiles) are saved in GridCraft's native .grc format, which wraps a standard Tiled body in a gridcraft envelope so server-side parsers and Tiled-aware tools can still read the inner map.