Terraria Map Editor, TEdit, is a stand alone, open source map editor for Terraria. It lets you edit maps just like (almost) paint.

There is an auto-backup feature that will backup worlds to *.wld.Tedit, but you should make your own backups.

This program received 2 awards
  DOWNLOAD Free
Specifications
Developer:
Binary Construct
License type:
Open source
Related stories
Related suggestions