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.WLD File Extension

A .WLD file is a ESRI World File, created by Re-Logic.

Open with Re-Logic Terraria. Available for Windows and Mac.

What is a .WLD file?

The .WLD file extension is associated with two different types of files, each used by different software and for different purposes.

1. **ESRI World File**: This type of .WLD file is used in the context of geographic information systems (GIS). It is a plain text file that accompanies a raster image file (such as a .TIF or .JPG) used in mapping. The .WLD file contains important spatial information including the size of the pixels in the image, the coordinate of the upper-left pixel, and details about the image's rotation. This information allows the raster image to be correctly aligned with geographic coordinates on a map. Programs that can open or use these .WLD files include various GIS applications like ArcGIS by ESRI.

2. **Terraria World File**: This type of .WLD file is specifically related to the video game Terraria, developed by Re-Logic. In this context, a .WLD file represents a game world where players engage in action-adventure and sandbox-style gameplay. The file includes all the data about the game world, such as terrain features, locations of water bodies, monsters, items, and other objects within the game world. Players can create, save, and load these .WLD files through Terraria's "Select World" screen to continue gameplay in a specific world. Tools and programs that can open or edit these .WLD files include Terraria itself, TEdit (a Terraria map editor), and TerraMap (an interactive Terraria map viewer).

It's important to note the context in which a .WLD file is being used—whether it's for GIS purposes or for playing Terraria—as the tools and applications required to open and interact with the file will differ significantly based on its use.

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