US Postal Formatter

US ZIP Code Formatter

Format US ZIP codes instantly in your browser. Enter 5-digit codes or ZIP+4 values and get a clean, consistent result without any upload step.

Live formatting No upload needed

Input

Tip: paste multiple ZIP codes, one per line.

Output

Paste a value or load the sample.

How this formatter works

Type or paste one value per line and the page normalizes the result locally in your browser. ZIP+4 values become 12345-6789, while 5-digit ZIP codes stay unchanged.

Example: 123456789 becomes 12345-6789.

123456789 -> 12345-6789 10001 -> 10001

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