What it does
Upload a CSV of US addresses. Get back a normalized file with consistent capitalization, expanded abbreviations (St → Street, Apt → Apartment), and addresses split into separate fields: Street1, Street2, City, State, ZIP.
The problem it solves
Address lists collected from web forms, CRMs, or third-party data sources are inconsistent. ALL CAPS street names, lowercase cities, "Ave" mixed with "Avenue", two-letter vs full state names — all in the same file. This tool brings them to a consistent standard without an API call or manual review.
What it handles automatically
- Capitalization — Proper case for street names, cities, and proper nouns (McArthur, O'Brien)
- Abbreviation expansion — Standardizes St/Ave/Blvd/Dr to full or abbreviated form (your choice)
- State normalization — Converts full state names to 2-letter USPS codes (or vice versa)
- ZIP code formatting — Pads 4-digit ZIPs, normalises ZIP+4 format
- Address splitting — Separates combined "123 Main St, Springfield, IL 62701" into components
FAQ
Does this validate addresses against USPS? No — this tool normalises formatting only. It does not make an API call to verify that the address exists. Use a USPS validation service for deliverability verification.
Does it handle PO Boxes? Yes. PO Box, P.O. Box, and similar variants are normalised to a consistent format.
Does it store my data? No. All processing happens in your browser.