Map viewers

Map viewers are 3rd-party programs that analyze saved maps and display their contents in one easily-viewable graphic.

Map viewers are useful for finding Floating Islands and other resources, as well as providing a total World view not otherwise attainable. Some programs also provide advanced tools for checking map variables, checking Chest contents, and even altering maps in various ways.

TEdit
A powerful map editor and viewer for Windows. Useful for copying Naturally Generated structures and Cleansing The Corruption or The Crimson.
 * Documentation at GitHub
 * Thread



TerraMap
TerraMap lets you pan and zoom an interactive map and dynamically highlight items, items in chests, dungeons, NPCs, etc. It also supports headless, unattended world map image generation via command-line, complete with highlight capability.



Terrafirma
Pan and zoom maps with full game textures and lighting applied (textures require a local Terraria installation). Inspect chests and signs with right-click. Quickly jump to spawn, NPC houses, and Chests containing specific items. A variety of Save options to showcase your creations.

If textures do not display and the "Use Textures" option of the "View" menu is grayed out, click Help -> Settings, uncheck "Autodetect Texture Folder", click "Browse...", and locate the  folder of your Terraria installation. Close and restart Terrafirma for this setting to take effect.


 * Thread



MoreTerra
A map viewer that generates .PNGs which can be marked for map features, item locations, and Chests containing specific items.


 * Latest Thread
 * noroom Thread
 * UberJumper Thread



TerraMap Online
A cross-platform web application version of TerraMap that lets you pan and zoom an interactive map and dynamically highlight items, dungeons, NPCs, etc.

Omnitool
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.

Features:
 * Custom Made World Generators
 * Planetoids
 * Flatworld
 * Dungeon Arena
 * World from Image
 * World Mapping
 * Saves .png map files in your terraria saves directory, for viewing with image viewers.
 * Clicking on a world listing also renders the world similar to Terraria or Terrafirma.
 * Available in twelve languages.
 * Can render Worlds with 16x16 pixels per block, like Terraria

Terraria Mapper
Original mapping program. 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.

TerrariaMapTool
Generates the map tiles and the data needed to display a Terraria world using the Google Maps API.