Converter is an activated item.



  • Using this item on Black Hearts will activate the Black Hearts damaging effect.
  • Dlc nr indicator.png Must use with two full Soul Hearts to work. One and a half will not work.


  • Dlc r indicator.png Collectible Book of Virtues icon.png Book of Virtues: Spawns wisps in the middle ring, looking like hearts. Wisps have slightly higher health than average.
  • Dlc nr indicator.png Collectible Guppy's Paw icon.png Guppy's Paw: Allows Isaac to attain up to 10 Heart Containers and 1 Soul Heart.
    • Dlc r indicator.png Allows Isaac to attain up to 12 Heart containers.



  • Dlc nr indicator.png Collectible Car Battery icon.png Car Battery: No effect.
    • Dlc r indicator.png : Consumes 2 Soul Hearts and produces 2 Red Heart Containers.
  • Dlc a† indicator.png Character The Soul (Character) icon.png The Soul: Consumes Soul Hearts and produces Bone heart.png Bone Hearts for Character The Forgotten icon.png The Forgotten. Does nothing when used by The Forgotten.
  • Dlc r indicator.png Character Tainted Bethany icon.png Tainted Bethany: When used while fully charged, adds 2 Blood Charges to her pool at no cost to her Heart total. When used with no charges, consumes 3 Blood Charges and produces 2, resulting in a net loss.
    • With Collectible Car Battery icon.png Car Battery: Consumes 3 Blood Charges and produces 4, still at no cost to Heart total, resulting in infinite Blood Charges.

In-game Footage


  • The Converter is a reference to a converter, a device or system that changes the form of something.
  • According to Edmund via the Four Souls Isaac lore stream, the Converter's sprite was originally supposed to be similar to an adapter that converted US-standard power plugs for UK-standard power outlets, then he "just threw some wires on it."[1]
  • The Converter can be seen as an opposite to Collectible Guppy's Paw icon.png Guppy's Paw. Where the Converter takes two Soul or Black Hearts to form a Heart container (or just one Soul or Black Heart as of Repentance), Guppy's Paw takes one Heart container to form three Soul Hearts. Additionally, their flavor texts are similar.


PC NormalIndicator.png 1TNY 7MJ0 (1st floor Shop Icon.png Shop, purchase after getting Collectible A Quarter icon.png A Quarter in 1st floor Treasure Room Icon.png Treasure Room; must be Character Isaac icon.png Isaac because a bomb is needed to get a key. The Collectible Pandora's Box icon.png Pandora's Box in the Curse Room Icon.png Curse Room must be picked up before entering the Shop)

PC HardIndicator.png LGD3 W0PB (1st floor Shop Icon.png Shop, Purchase after getting Trinket Store Credit icon.png Store Credit as a drop)

Switch KEBM C08G (1st floor Shop Icon.png Shop, half price)


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