Block Swap

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Desktop versionConsole versionMobile version
Desktop/Console/Mobile-Only Content: This information applies only to the Desktop, Console, and Mobile versions of Terraria.
Block Swap in action.
Block Swap toggles
Desktop version Desktop icons
Block Swap off.png
Block Swap on.png
Mobile version Mobile icons
Block Swap off (mobile).png
Block Swap on (mobile).png

Block Swap is a building mechanic that allows the player to replace placed blocks in a single step, rather than having to remove existing blocks manually first. Block Swap can be activated or de-activated via a toggle located Desktop version to the left of the main inventory / Mobile version in the tools menu below the inventory.

Swapping blocks still requires that a player possess a tool with sufficient pickaxe power to free the target blocks, as the game performs a check for a tool of sufficient power before allowing Block Swaps to occur. Additionally, certain blocks can never be swapped via Block Swap (see list below).

When Block Swap is enabled, the player can place blocks over existing placed blocks, causing new blocks to "swap" with those already placed. When swapping blocks, existing placed blocks are automatically freed and dropped for collection.

Unswappable blocks

Some blocks cannot be swapped:


  • Block Swap can be used to extract ore veins that are hanging over a cliff and would cause the player to fall when broken.
  • Chlorophyte Ore can be swapped for mud to collect the Chlorophyte while allowing it to grow back.
    • This does not grant the Achievement "Photosynthesis".
  • Blocks beneath a Demon Altar/Crimson Altar can be swapped without destroying the Altar.


  • Desktop 1.4.4:
    • Torches and campfires can now be swapped.
    • Players can now blockswap ropes out for platforms or minecart tracks if there is already a platform/minecart track to the side of the rope.
  • Desktop 1.4.1: Gravity-affected blocks can now be swapped out from the topmost tile downwards. At high enough tiers of pickaxe, they can be swapped out from any position like other blocks.
  • Desktop Fixed a bug where blockswapped tiles maintain their cracked texture.