Ethereum-Solidity Quiz Q6: What is the max bytecode size for smart contract deployment on Ethereum?

Source: Dev.to

Maximum Bytecode Size (EIP‑170)

The maximum bytecode size for a smart contract deployment on Ethereum (EIP‑170) is 24,576 bytes (24 KB). If the compiled contract bytecode exceeds this size, the deployment transaction will fail.

The limit applies to the final deployed bytecode—the EVM bytecode stored on the blockchain. It does not include constructor code or other temporary code that runs only during deployment.

Mitigation Techniques

• Code splitting – divide large contracts into smaller ones.
• Libraries – move reusable logic to external library contracts.
• Proxy patterns – keep a minimal proxy contract that delegates calls.
• Solc optimizer – enable and tune the Solidity compiler optimizer.
• Remove unnecessary code – strip out dead code, debugging statements, etc.
• Move code to other contracts – refactor functionality into separate contracts.