Address List Utilities

Validate, checksum, dedupe, and clean address lists.

Addresses

One address per line, or "address,amount" separated by a comma, semicolon, tab, or whitespace. Blank lines and lines starting with # or // are skipped.

Remove duplicates

Accepted formats

One address per line, or "address,amount" separated by a comma, semicolon, tab, or whitespace. Blank lines and lines starting with # or // are skipped.

How it works

Offline

1
Paste or upload
Drop addresses into the textarea or upload a .csv/.txt file, one per line, optionally with an amount.
2
Review issues
Invalid rows and duplicates are flagged with the exact line and reason, so you can fix the source file if needed.
3
Export the clean list
Download the deduped, checksummed result as CSV, JSON, or plain text. This tool never makes a network request.

Read the docs

How it works

Offline

1
Paste or upload
Drop addresses into the textarea or upload a .csv/.txt file, one per line, optionally with an amount.
2
Review issues
Invalid rows and duplicates are flagged with the exact line and reason, so you can fix the source file if needed.
3
Export the clean list
Download the deduped, checksummed result as CSV, JSON, or plain text. This tool never makes a network request.

Read the docs