How to Create a Shipping Label

Decide first: do you need postage, or just the label?

Everything downstream depends on this. If the parcel needs postage paid and a tracking number, you need a carrier account (UPS, USPS, FedEx, DHL) or a postage reseller. The label they generate carries a tracking barcode tied to a paid transaction.

If postage is already handled — a prepaid drop-off, a courier who invoices monthly, an internal transfer, a return label going inside a box — then you need the label document only, and a free generator produces it in under a minute.

People get stuck here because both things are called "shipping labels". They are different artefacts. One is a paid transaction with a scannable tracking barcode; the other is a correctly-formatted address block. Both are legitimate; they solve different problems.

The four steps

1. Gather both addresses in full. Sender and recipient, including any unit, suite, or apartment number. Verify the postcode independently rather than trusting memory — a transposed digit routes a parcel to the wrong sorting facility and can add days.

2. Choose the label size. 4×6 inches is the industry standard and what thermal printers expect. Letter size works on any inkjet or laser printer using adhesive sheets. The choice determines the file you generate, so make it before you create the label rather than after.

3. Generate the label. Enter the addresses, add a reference or order number if you want one, and produce the PDF. Check the preview: the recipient address should be the most prominent element on the label, larger than the sender address.

4. Print at 100% scale. This is where most labels go wrong. In the print dialog, set scaling to "Actual size" or 100% — not "Fit to page". Fit-to-page shrinks the label by a few percent, which is enough to make a barcode fall outside its readable tolerance.

The mistakes that actually delay parcels

Missing unit numbers. By a wide margin the most common cause of a failed delivery. If the address has an apartment, suite, or unit, it belongs on the street line or the line directly beneath it.

Printing at fit-to-page. Scales the label down, moves the barcode, and can push it outside scanner tolerance. Always print at 100%.

Old labels left on reused boxes. Sorting is increasingly automated, and a scanner does not know which of two barcodes is current. Remove or completely cover any previous label — a marker line through it is not enough.

Tape across the barcode. Shiny packing tape creates glare that defeats laser scanners. Tape around the label, not over the barcode. If the label must be protected, use a proper adhesive pouch.

Handwritten corrections. If an address changes, generate a new label. A crossed-out and rewritten address slows manual sorting and is frequently misread.

What the carrier does with your label

Understanding this makes the formatting rules feel less arbitrary. When a parcel enters the network it passes through automated sorters that photograph and scan it, often several times. Each scan needs to find the barcode quickly, read it cleanly, and pass the parcel to the correct chute.

The address block matters at a different stage. When automation cannot resolve a parcel — damaged barcode, unreadable scan — a person reads the address and routes it manually. That's why the recipient address needs to be the largest text on the label and why a clear, complete address is worth more than a decorative layout.

The quiet zone around a barcode — the blank margin on all four sides — exists because scanners use it to detect where the barcode starts and ends. Text or a border crowding that margin is a common reason an otherwise perfect label scans inconsistently.