How to Verify an ERC-20 Token on Etherscan
Contract verification makes your source code publicly readable on block explorers. Learn why it's essential, how it works across different networks, and how TokenGeneratorApp handles it automatically.
Why Verification Matters for ERC-20 Tokens
Smart contract verification is the crypto equivalent of an open-source audit. When your contract is verified, anyone — traders, investors, auditors, DEX aggregators — can read exactly what your token contract does.
Unverified contracts only show raw bytecode (hexadecimal machine code) which is virtually impossible to read. This means potential holders can't confirm whether the contract has hidden mint functions, backdoors, or malicious logic.
For this reason, many experienced crypto users, DEX aggregators (like DexScreener, DexTools), and token analysis tools flag unverified contracts as high-risk. Verification is the single most important trust signal for a new token.
Block Explorers by Network
Each EVM network has its own block explorer where contracts are verified. TokenGeneratorApp auto-verifies on all of them.
Etherscan
Ethereum · etherscan.io
BaseScan
Base · basescan.org
PolygonScan
Polygon · polygonscan.com
Arbiscan
Arbitrum · arbiscan.io
Snowtrace
Avalanche · snowtrace.io
Etherscan (OP)
Optimism · optimistic.etherscan.io
How Auto-Verification Works
Deploy from your wallet
You configure your token and sign the deployment transaction. The smart contract bytecode is sent to the blockchain.
Transaction confirms on-chain
The network confirms your transaction (1–15 seconds depending on the network). Your contract now exists on the blockchain.
Source code submitted to explorer
Our system automatically submits the Solidity source code, compiler settings, and constructor arguments to the network's block explorer API.
Explorer verifies and publishes
The block explorer compiles the source code and confirms it matches the on-chain bytecode. A green "Verified" badge appears on your contract page.
Manual Verification (Any Explorer)
The manual verification process is the same across all EVM block explorers:
- 1Navigate to the block explorer for your network (e.g., etherscan.io for Ethereum).
- 2Search for your contract address and go to the "Contract" tab.
- 3Click "Verify and Publish Source Code".
- 4Select the correct compiler version (must match exactly what was used to compile).
- 5Choose the appropriate compiler type (Single File, Multi-File, or Standard JSON).
- 6Paste or upload your source code. Enable optimization if it was used during compilation.
- 7Enter constructor arguments in ABI-encoded hex format (if applicable).
- 8Submit. The explorer will compile the code and compare it to on-chain bytecode.
Frequently Asked Questions
A verified contract means the Solidity source code has been uploaded to the block explorer and confirmed to compile to the exact same bytecode deployed on-chain. This proves the source code is genuine and allows anyone to read and audit the contract logic.
Yes, the process is essentially identical across Etherscan, BaseScan, PolygonScan, Arbiscan, and other EVM block explorers. They all use the same verification standard — compile the source code and match it against on-chain bytecode.
Yes. Regardless of which network you choose (Ethereum, Base, Polygon, Arbitrum, Avalanche, Optimism), your contract is automatically submitted for verification on the respective block explorer after deployment.
A "Similar Match" means BscScan/Etherscan found another verified contract with identical bytecode but different metadata. This still means your code is verified and readable. An "Exact Match" confirms both bytecode and metadata match perfectly.
Yes. The manual verification steps on this page work for any ERC-20 contract, regardless of how it was deployed. You just need the source code, compiler version, and constructor arguments used during deployment.
Auto-verification through TokenGeneratorApp typically completes within 30–60 seconds after deployment. Manual verification on Etherscan is usually instant but can take a few minutes during peak usage.
Deploy a Verified ERC-20 Token
Auto-verified on Etherscan, BaseScan, PolygonScan & more. Open-source.
Create Token Now