Format mailing addresses for envelope printing with USPS/Royal Mail standards and barcode generation.
Paste a half-typed address and this tool returns a print-ready envelope block: recipient on the first line, delivery line second, then city, state, and ZIP or postcode, normalized to the USPS or Royal Mail standard you pick. It can also encode the routing digits as a barcode for the envelope's lower-right corner. What surprises most people: correct USPS formatting is all capitals with no punctuation, which looks like shouting until you remember the sorting machines that read it. And the tool fixes layout only - it formats what you typed, so a nonexistent address comes out just as clean as a real one.
A concrete input and expected output from the current implementation.
Input
ms. jane a. smith, 2210 north oak street, apartment 3b, springfield, il 62704
Expected output
MS JANE A SMITH 2210 N OAK ST APT 3B SPRINGFIELD IL 62704
USPS formatting uppercases every line, strips punctuation, and swaps in the standard abbreviations from Publication 28 (North to N, Street to ST, Apartment to APT). The ZIP stays as typed because the +4 digits come from USPS address data, not rules, so the tool asserts only the five-digit ZIP it was given.
Text is split into lines, then casing is forced to the authority's convention, punctuation is stripped, and street suffixes, directionals, and secondary unit designators are expanded or abbreviated against the official tables - North becomes N, Street becomes ST, Apartment becomes APT. Lines are reordered as recipient, delivery address, then city, state, and ZIP.
The routing digits - ZIP or ZIP+4 for USPS, the postcode for Royal Mail - are encoded into that authority's symbology: the Intelligent Mail barcode for USPS, RM4SCC for Royal Mail, each with its own check digit rules. The result prints as a graphic meant for the lower-right band of the envelope where sorting equipment scans it.
No. The tool normalizes layout, abbreviations, and line order to the postal standard; it does not check that the address exists, that the ZIP matches the city, or that a unit number is present. What it gives you is a correctly formed block - the part of delivery you can control on your side.
USPS sorting machines read uppercase, punctuation-free lines most reliably, and Royal Mail's clear-addressing guidance likewise favors no punctuation, with the post town and postcode in capitals. Mail in ordinary mixed case usually still arrives; the all-caps block is simply the form the machinery was designed around.
The example and behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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