Map viewers

Map viewers are 3rd-party programs that analyze saved maps and display the contents graphically. They are useful in finding Underground Jungles and Floating Islands.

There are no currently released mods for Terraria; only these kinds of utilities exist.

= Currently-developed viewers =

Terraria Mapper
By retep998: [LINK DOWN] 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.

Terraria Map Viewer
By UberJumper:

Current Version: v1.5

Basic Mapping Program with symbols denoting veins of gems, altars, Crystal Hearts, Chests, and Shadow Orbs. Version 1.1 allows users to filter displayed chests by content. It also highlights meteorite in magenta.

Terrafirma
By mrkite:

Current Version: v1.6.5

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
By BinaryConstruct

Current Version: v2.6.3 (released 7/3/11)

Also doubles as an editor.