What is a Soulbound Token

Let’s first understand what a Soulbound Token (SBT) is:

A Soulbound Token is a unique digital asset that cannot be transferred to another wallet. Once minted, it remains permanently tied to the owner’s wallet—perfect for credentials, achievement badges, or any on-chain proof of identity.

How to make your tokens Soulbound or Non-Transferrable

The easiest way is via the Permissions tab on your thirdweb contract dashboard. For a visual walkthrough, check out our guide on making NFTs non-transferable.

If you prefer using the Explorer, follow these steps:

Connect your wallet
Ensure your wallet is connected to the Dashboard/Explorer and set to the same network as your contract.
Select the correct network
Verify the network selector (top-right) matches your contract’s deployment chain (e.g., Ethereum Mainnet, Goerli).
Open the Explorer
In the thirdweb Dashboard, select your contract and switch to the Explorer tab.
Choose revokeRole under write
The revokeRole function requires two inputs: Role and Account.
Convert TRANSFER_ROLE to bytes32
Use a keccak256 tool to hash the string TRANSFER_ROLE, then prefix with 0x.
For example:
0x8502233096d909befbda0999bb8ea2f3a6be3c138b9fbf003752a4c8bce86f6c
Set the account to the zero address
Enter 0x0000000000000000000000000000000000000000 to revoke transfer rights from every wallet.
Confirm the on-chain transaction
Click “write” and approve the transaction in your wallet.
Verify in Permissions
Refresh the Permissions tab to confirm that TRANSFER_ROLE is revoked for the zero address.

That’s it—your tokens are officially soulbound!