Avalanche Multisender - ERC-20 Airdrop Tool

The 20lab Avalanche multisender tool is a batch distribution utility that lets you send ERC-20 tokens to thousands of wallet addresses in a single transaction. It's built for token creators who need to distribute ERC-20 tokens at scale - airdrops, vesting payouts, reward campaigns, and team allocations - without sending each transfer one by one.

The tool works on Ethereum, BSC, Base, Polygon, Arbitrum, Optimism, Avalanche and 12+ other EVM chains, supports any standard ERC-20 token (including native coins like ETH or BNB), and significantly cuts gas costs by batching transfers. It pairs naturally with the 20lab token generator for projects that want to launch and distribute in one workflow.

No - these are two different things:

• Avalanche airdrops (also called token airdrops) happen when a project distributes free tokens to eligible wallets and users claim them. You are the recipient.
• The 20lab Avalanche airdrop tool is a multisender that distributes tokens you already own to other wallets. You are the sender.

If you're trying to claim a free token airdrop, you need the official project's claim page - not a multisender tool. If you own ERC-20 tokens and want to distribute them to your community, this tool is the right one.

The Avalanche multisender works in 3 steps:

1. Connect your wallet and enter the contract address of the ERC-20 token you want to distribute.
2. Upload recipients as a CSV or TXT file, or paste them as text. Choose equal amounts for everyone or different amounts per address.
3. Confirm the transaction. The tool automatically batches recipients into the largest transactions the EVM block gas limit allows, then signs them sequentially.

You can monitor every batch in real time from the "Check progress" panel, including transaction hashes and block explorer links.

To bulk-send ERC-20 tokens to multiple wallets, you need a multisender contract because standard ERC-20 transfers only support one recipient per transaction. Sending tokens individually would mean signing one transaction per recipient - slow, expensive, and impractical past a few dozen wallets.

The 20lab Avalanche multisender bundles recipients into batches that fit within the block gas limit and signs them on your behalf. For a 1,000-wallet airdrop, this turns 1,000 separate transactions into roughly 5-15 batched ones, cutting both time and gas fees dramatically.

The Avalanche multisender works with all standard ERC-20 tokens, including:

• Major stablecoins and tokens (USDT, USDC, DAI, WETH, etc.)
• Custom tokens created with 20lab ERC-20 token generator or other generators
• Native coins (ETH, BNB, MATIC, AVAX, etc.) for distributing the chain's gas token
• ERC-20 tokens with extensions like burnable, pausable, or tax-on-transfer

The tool auto-detects the token contract and selects the appropriate transfer method. Tokens with active anti-bot restrictions, blacklists, or unusual transfer logic may need configuration adjustments before bulk distribution.

A single Avalanche multisender batch typically handles 100-800 recipients per transaction, depending on the block gas limit and current gas prices on the chain. Higher gas prices and complex token contracts reduce batch size; cheap chains with high block gas limits allow larger batches.

For larger distributions, the multisender automatically splits your recipient list into sequential batches sized for the chain.

The 20lab Avalanche multisender accepts recipient data in two formats:

• CSV / TXT upload - One row per recipient with wallet address and amount in separate columns. Max file size 2 MB.
• Manual text entry - Paste addresses directly using the example format shown in the interface.

Every address is validated against the EVM address format (40-character hex with 0x prefix and checksum) before the transaction is signed. Invalid entries are flagged before any gas is spent.

Avalanche airdrops have two cost components:

• Gas fees - The network fee, which varies dramatically by chain. Ethereum mainnet can cost real money; L2s like Base and Arbitrum and alt-L1s like Polygon or BSC cost pennies to fractions of a cent.
• 20lab platform fee - A per-recipient service fee, shown in full before you confirm.

Compared to sending tokens one wallet at a time, the multisender typically cuts total fees by 90%+ by batching transfers. The interface always displays the complete cost breakdown for your selected chain before any transaction is signed.

Processing time depends on the chain and network conditions:

• Cheap L2s and alt-L1s (Base, Arbitrum, Polygon, BSC) - Each batch finalizes in 2-10 seconds
• Ethereum Mainnet - 12-30 seconds per batch under normal load
• Network congestion - Can multiply confirmation times during peak periods
• Gas price settings - Higher priority fees mean faster confirmation

As a rough rule, a 1,000-wallet airdrop completes in 2-10 minutes on L2s and alt-L1s, longer on Ethereum mainnet. Progress is tracked live in the sidebar.

If a batch fails during your Avalanche airdrop, only that specific batch is affected - all other batches continue processing normally. Failed batches can be retried independently from the progress panel.

The most common failure reasons are:

• Insufficient ERC-20 token balance in the sender wallet
• Insufficient native coin balance to cover gas fees
• Recipient address rejected by token's blacklist or anti-bot cooldown
• Token transfers paused via the ERC-20 pause tool
• Network congestion causing the transaction to be dropped

Each failed batch shows the exact revert reason so you can resolve it and resume.

The 20lab multisender supports the Avalanche C-Chain only (chain ID 43114). Avalanche Subnets (also called L1s in newer Avalanche terminology) are independent networks with their own chain IDs and validator sets, not supported through this tool.

The C-Chain is the EVM-compatible chain at the heart of the Avalanche ecosystem and is where the vast majority of Avalanche tokens live, including AVAX, USDC.e, JOE, and most major DEX activity (Trader Joe / LFJ, Pangolin, etc.).

If your token is on a custom Avalanche Subnet, you would need a Subnet-specific multisender. For all standard AVAX-ecosystem tokens, the C-Chain version of this tool covers your distribution needs.