USPS Label Resizer
Convert USPS Click-N-Ship, Stamps.com, Endicia, Pirate Ship and marketplace PDFs into 4 × 6 thermal, A6, half-page or any custom size — directly in your browser.
Drop your USPS label here
Click-N-Ship, Stamps.com, Endicia, Pirate Ship, ShipStation
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How it works
- 1
Upload
Drop a USPS shipping label PDF or image. It stays on your device.
- 2
Pick output size
Choose 4×6 thermal, A6, half-page sticker, or any custom size.
- 3
Resize & download
We re-render the label at the new size and hand back a fresh PDF.
USPS Click-N-Ship and most third-party USPS providers print the label in the top half of an 8.5 × 11 PDF. For Zebra / Rollo / DYMO thermal printers, pick 4 × 6 in and the “Crop top half” fit mode. Pirate Ship and ShipStation already export at 4 × 6 — for those, leave fit mode on “Fit”.
Supported output sizes
Match your thermal printer or sticker sheet exactly.
| Output size | Inches | Millimeters | Best for |
|---|---|---|---|
| 4 × 6 thermal | 4 × 6 in | 102 × 152 mm | Zebra, Rollo, DYMO 4XL, Brother thermal |
| 6 × 4 landscape | 6 × 4 in | 152 × 102 mm | Landscape thermal feed |
| 4 × 4 | 4 × 4 in | 102 × 102 mm | Square thermal labels |
| A6 | 4.13 × 5.83 in | 105 × 148 mm | EU thermal labels |
| A5 | 5.83 × 8.27 in | 148 × 210 mm | A5 sticker sheets |
| Letter half-page | 8.5 × 5.5 in | 216 × 140 mm | Avery 5126 / 8126 |
| Letter quarter | 4.25 × 5.5 in | 108 × 140 mm | 4-up Avery |
| Letter (full) | 8.5 × 11 in | 216 × 279 mm | Plain paper / full-sheet sticker |
| A4 (full) | 8.27 × 11.7 in | 210 × 297 mm | Plain A4 paper |
| Custom | Anything | Anything | in / mm / cm / pt |
USPS label resizing — FAQ
▶ How do I convert Click-N-Ship 8.5×11 to 4×6?
Upload the Click-N-Ship PDF, pick 4 × 6 as the size, and use "Crop top-half" — USPS Click-N-Ship prints the label in the top half of the page, and this preset trims it for thermal printers.
▶ Does it work with Pirate Ship, Stamps.com, ShipStation?
Yes. Any PDF works: Click-N-Ship, Stamps.com, Endicia, Pirate Ship, ShipStation, Shippo, ShippingEasy, plus marketplace exports from eBay, Etsy, Poshmark, Mercari and Depop.
▶ Will USPS scanners still read the resized barcode?
Yes. The label is re-rendered from the vector PDF, so the IMpb barcode, tracking number and postage indicia stay sharp. SCAN forms scan correctly.
▶ Can I print on a Rollo, Zebra ZP450, or DYMO 4XL?
Yes — pick 4 × 6 in. All three printer families load 4 × 6 (102 × 152 mm) labels and accept the resized PDF.
▶ Is anything uploaded?
No. The PDF is parsed and re-rendered in your browser. Nothing is uploaded, logged, or stored on a server.
How to Use USPS Label Resizer
To resize a USPS shipping label, upload your USPS PDF label file using the upload area. Labels from USPS Click-N-Ship, Stamps.com, Endicia, and Pirate Ship are all supported. These are typically delivered as 8.5×11 inch PDFs with the actual 4×6 label occupying the top portion of the page.
Select your target output size — 4×6 thermal, A6, or custom dimensions — then click Resize. The tool crops and rescales the label in your browser without any server upload. Download the resulting PDF and print it on your thermal label printer without any additional scaling adjustments.
Frequently Asked Questions
Which USPS label formats does this tool support? expand_more
The tool works with USPS Click-N-Ship, Stamps.com, Endicia, Pirate Ship, and any other service that generates USPS labels as PDF files on standard Letter paper.
Why does my USPS label come on an 8.5×11 page? expand_more
USPS and third-party shipping platforms generate labels as Letter-size PDFs so they can be printed on standard office printers. Thermal label printers require the 4×6 label area to be extracted and resized.
Will Priority Mail and First-Class labels both work? expand_more
Yes. The resizer works with all USPS service types — Priority Mail, Priority Mail Express, First-Class Package, Media Mail, and others — as long as the label is in PDF format.
Can I use this for labels from Pirate Ship? expand_more
Yes. Pirate Ship generates standard USPS PDF labels that work with this resizer. Upload the PDF, select 4×6 as the output size, and download the thermal-ready label.
Is my shipping information kept private? expand_more
Yes. All resizing is performed locally in your browser. Your label PDF containing recipient addresses and tracking numbers is never uploaded to any server.
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