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Zip Code to State Mapper

Upload a CSV with zip codes and get full state names appended instantly. Free, fast, and 100% client-side — your data never leaves your browser.

Drop your CSV here

or browse to choose a file

.csv or .txt · Any size

Preview

How it works

1

Upload a CSV or text file containing US zip codes

2

Auto-detect identifies the zip code column, or you pick it

3

Match against 42,000+ US zip codes to find each state

4

Download your original CSV with a new "state" column appended