| The following information is about software not developed by Re-logic.|
Modifications listed on this page may not have been tested, USE AT YOUR OWN RISK. By downloading any third party software, you acknowledge that you cannot hold ANYONE responsible for what happens to your game or account.
Map viewers are 3rd-party programs that analyze saved maps and display their contents in one easily-viewable graphic. They are useful in finding Floating Islands, rare Items, and other resources, as well as providing a total World view not otherwise attainable.
Current Version: 1.10.2, compatible with Terraria 1.1.2
- Original program by UberJumper, updated by noroom.
- Currently maintained by Solsund
Current Version: 1.9.8 compatible with Terraria 1.1.2
- By mrkite
Displays the output map in a scrollable window. View the map with textures and lighting. Inspect chests and signs with right-click. Quickly jump to spawn or NPC houses. A variety of Save options to showcase your creations.
 Terraria Map Editor
Current Version: 3.1.12019.2351, compatible with Terraria 1.1.2
- By BinaryConstruct
Powerful map editor, it allows to alternate world variables.
It is also Known as TEdit.
 Terraria Mapper
- By retep998
Original mapping program, forum thread link broken -- found here: 
Must be unzipped into the folder where Terraria keeps its world saves, usually Documents/My Games/Terraria/Worlds. Then click and drag the map file onto the executable.
Current Version: 14, compatible with Terraria 1.1.2 and tConfig
- By Berserker66
An extensible, open source, tool collection that merges many conveniences of other tools into a GUI. Available in multiple languages, Omnitool creates world backups and maps worlds on launch. It comes with several plugins to provide more uses, and more plugins may be found on the TerrariaOnline forums.
- Custom Made World Generators
- Dungeon Arena
- World Mapping
- Saves .png map files in your terraria saves directory, for viewing with image viewers.
- Worldify, creating a world from an image file
- Available in nine languages
- Can create a portable Terraria
- Can render Worlds with 16x16 pixels per block, like Terraria
 Python World Viewer
Current Version: 220.127.116.11
- By Berserker66
Similar to the other World Viewers, this creates a png map of a Terraria world. Written in Python, this viewer is compatible with Windows, Linux, and Mac operating systems. It also supports marking of points of interest, like altars, chests and crystal hearts.