USPS-Style Address Standardizer
Format any address instantly for correct format!
What This Tool Does
This little tool helps you format the address on your letter. If you are ever unsure whether to use Apartment or APT, Suite or STE, or another USPS-style abbreviation, it will auto-convert the address for you. It also formats the address lines correctly so you can quickly check that everything looks right before mailing.
Example
Before (Original)
John Smith
123 North Main Street, Apartment 4B
Los Angeles, California 900011234
After (Standardized)
JOHN SMITH
123 N MAIN ST APT 4B
LOS ANGELES CA 90001-1234
Frequently Asked Questions
What does this address standardizer do?
This tool formats your address to match USPS standards: all caps, no punctuation, standard abbreviations (ST, AVE, APT, etc.), and proper ZIP code formatting. It does not validate whether the address exists.
Why does USPS prefer standardized addresses?
Standardized addresses help USPS sorting machines read addresses quickly and accurately. Consistent formatting reduces delivery errors and speeds up mail processing. Using the standard format can help prevent your mail from being delayed or returned.
What abbreviations does this tool use?
The tool uses official USPS Publication 28 abbreviations including: ST (Street), AVE (Avenue), BLVD (Boulevard), DR (Drive), APT (Apartment), STE (Suite), and directionals like N, S, E, W. It also converts full state names to two-letter codes.
Can I paste a multi-line address?
Yes! Paste your address exactly as you have it, including line breaks. The tool will standardize each line while preserving the line structure.