Address List Utilities

The Address List Utilities tidy up a raw address list: validate every entry, apply checksum casing, drop duplicates and malformed rows, and export a clean list. It is the natural prep step before a multisend or a merkle airdrop. Everything runs in your browser with no network requests.

What it does

• Parses a pasted or uploaded list of addresses, optionally with amounts.
• Validates and checksums each address, reporting every problem it finds.
• Removes duplicates and exports a clean list as CSV, JSON, or plain text.

Input

Paste into the textarea, or upload a .csv/.txt file. The parser understands common separators and address,amount rows, validates each address, and applies EIP-55 checksum casing.

Options

• Remove duplicates (on by default).
• Keep amounts: auto-detected from your input. When amounts are present and a duplicate is removed, the first occurrence is kept.

Results

• Stat badges: total rows, valid, invalid, and duplicates removed.
• Problems table: line number, the raw content, and the reason for any invalid row.
• Preview: the first cleaned rows, in monospace.

Export

Download the cleaned list as CSV, JSON, or plain newline TXT (for example addresses-clean.csv). The CSV includes an amount column only when amounts are present.

Step by step

1. Paste or upload your list.
2. Review the stats and the problems table, and adjust the options.
3. Export the clean list in the format you need.

Fees and gas

Free, and offline. This tool sends no transactions and makes no network calls.

Limits and safety

• Cleaning here does not change anything on-chain; it only prepares a list.
• Fix or drop flagged rows before using the list downstream; an invalid or duplicated address in a multisend or airdrop can misdirect funds.