This is currently the only available Map Editor for Terraria that I have been able to find. Unfortunately I believe the maker has been banned from the “official” forums and his posts have been removed, luckily Google had a cache of the page so I was able to grab it
It has a built in World Viewer and it lets you edit any Terraria map just like paint (with pencil, brush, fill and select tools). It will also let you change world settings (bosses defeated, time, meteors, invasions, etc), edit chests (you can see the chest contents) and change signs.
Here’s a few screenshots of the actual program:
These are the side tabs. All the bold text (on the right side) is editable, so you can change; the bosses that have been defeated, invasions, meteors and Shadow Orbs, turn Blood Moon on or off, moon phases and the time of day:
The chest tab is pretty awesome, it lists every chest in the game and their contents and coordinates. You appear to be able to edit the contents and their quantities:
You will need:
- Microsoft .Net Framework 4.0
Link to github page: https://github.com/BinaryConstruct/Terraria-Map-Editor
Issues? File an issue report on github: http://github.com/BinaryConstruct/Terraria-Map-Editor/issues
TIP: To easily flood the map with lava or water (good for adventure maps or just for a challenge) simply draw with a large sized brush with water or lava well above the ground over the entire map. Load it up in game and the water/lava will be on the ground, then you can go back into the editor and do whatever you want to or play with the map as-is.
On a kind of unrelated note, the guide seems to die if you drown him in lava (I thought you could never kill the guide) 😀
Quick video of me going through the various features for those who are interested: