Barcode and FNSKU label maker

Three steps to labels that scan

1. 1Pick what to makeDraw a UPC-A, EAN-13, Code 128 or QR barcode, or paste a list of FNSKUs to make Amazon product labels.
2. 2Choose the labelPick a sheet size or a thermal roll size, set which label to start on, and check the live preview. Warnings tell you when a label is too small.
3. 3Download and printSave SVG or PNG, or a PDF at the exact paper size. Print at 100% and use the test page to line up your sheets.

How to make FNSKU labels

1. In Seller Central, find the FNSKU of each product. It is a 10 character code that starts with an X, and it is on the label page of your shipment and in your inventory list.
2. Paste one line per product into the FNSKU tab: the FNSKU, the product name, the condition and how many labels you need. Only the FNSKU is required.
3. Pick the sheet or roll you have. If you are part way through a sheet, click the first free label so used ones are skipped.
4. Download the PDF and print it at 100%, on a laser or thermal printer. Scan one label before you print the rest.
5. Stick each label flat on the product, 0.25 inch in from the edge of the packaging, never on a curve or a corner, and cover any other barcode.

UPC, EAN and FNSKU: what is the difference?

• UPC-ATwelve digits. Used on products sold in the United States and Canada. A UPC-A is an EAN-13 with a leading 0.
• EAN-13Thirteen digits. Used on products sold in the rest of the world. Scanners read both UPC-A and EAN-13.
• FNSKUAmazon's own code for one of your products in Amazon's warehouses. Ten characters starting with an X. It belongs to your offer, not to the product, and it is printed as a Code 128 barcode.

Do I need to buy UPC codes?

A generator draws a barcode for a number you already have. It cannot make a UPC, because a UPC is a number that belongs to you, issued through GS1, the organisation that runs the system. Barcodes from anywhere else can clash with the real owner of that number.

You may not need one at all. If you sell on Amazon FBA and you are not the brand owner, Amazon requires its own FNSKU labels, which are free to print. If you own the brand and sell a product with its own packaging, you license numbers from GS1 in your country (GS1 US in the United States), and each size and colour needs its own number.

Check Amazon and the other marketplaces for what they ask of your category before you buy anything.

To license numbers, start at GS1 and pick your country.

Amazon and GS1 rules, with their pages

Each rule below was read on the official page linked under it on 21 October 2026. Rules change, so check the page before a big print run.

Amazon

• What is on the labelThe ASIN or FNSKU, the product name and the item condition, with the barcode.Official pageChecked 2026-10-21
• White space0.25 inch on the sides and 0.125 inch on the top and bottom, around the barcode and its text, and around the label content and the label edges.Official pageChecked 2026-10-21
• Label paperBlack ink on white, non-reflective labels with removable adhesive, between 1 x 2 inches and 2 x 3 inches.Official pageChecked 2026-10-21
• Laser sheet sizesAmazon lists 21, 24, 27, 30, 40 and 44 labels per page, from 48.5 x 25.4 mm to 70 x 36 mm on A4 and 1 x 2 5/8 inches on US Letter.Official pageChecked 2026-10-21
• PrinterThermal or laser. Do not use inkjet. 300 dots per inch or greater. Each label must stay readable and scannable for 24 months.Official pageChecked 2026-10-21
• Print scalingIf your printer tries to scale the PDF, set the scaling to None or 100%.Official pageChecked 2026-10-21
• Where to stick itAllow 0.25 inch between the label edge and the package edge. Not on a curve or a corner. Cover other barcodes.Official pageChecked 2026-10-21
• The Amazon barcodeThe Amazon barcode is the FNSKU label, which starts with an X. Codabar barcodes are not recognised.Official pageChecked 2026-10-21
• ResellersFrom March 31, 2026, resellers must use Amazon barcodes even if the product has a manufacturer barcode. Brand owners enrolled in Brand Registry can use manufacturer barcodes.Official pageChecked 2026-10-21

GS1

• Bar width (UPC-A and EAN-13)X-dimension 0.264 mm at the least, 0.330 mm target, 0.660 mm at the most. That is 80% to 200% of the target size.Official pageChecked 2026-10-21
• Nominal sizeAt 100% a UPC-A or EAN-13 is 37.29 mm wide with its quiet zones, with bars 22.85 mm high.Official pageChecked 2026-10-21
• Quiet zonesUPC-A: 9 modules on each side. EAN-13: 11 on the left and 7 on the right. A module is one bar width.Official pageChecked 2026-10-21
• Check digitMultiply the digits by 3 and 1 alternately from the right, add them up, and the check digit is what takes the sum up to the next multiple of ten.Official pageChecked 2026-10-21
• Where numbers come fromEvery product sold online or in stores needs a unique identification number. GS1 provides the barcodes used by retailers and marketplaces worldwide.Official pageChecked 2026-10-21
• One number per variationEach variation of each product you sell (a size, a colour) needs its own barcode.Official pageChecked 2026-10-21

Our own choices, not rules

• FNSKU symbologyCode 128. FNSKU barcodes are Code 128 in practice, but the Amazon pages we read do not name the symbology, so we call this our choice. Scan a test label before you print a big run.
• Sheet margins and spacingAmazon lists the label sizes and how many fit a page, not the margins. We use the common die-cut layout for each size. Sheets differ by about a millimetre between makers, so print the test page and use the nudge fields.
• Smallest barsWe warn when Code 128 bars come out narrower than 0.25 mm (two dots at 203 dpi) and when QR squares come out under 0.4 mm. GS1 sets its minimum only for UPC-A and EAN-13.
• Long product namesAmazon gives no label length for the name, so we fit it to the label and end it with an ellipsis when it is cut.
• Roll sizesThe roll sizes are our picks. Amazon gives a range of 1 x 2 inches to 2 x 3 inches, and we stay inside it.

Printing tips for labels that scan

• Print at 100%Choose Actual size or Scale 100% in the print window. Fit to page shrinks the bars and can make them unscannable. The test page has a ruler to prove it.
• Laser or thermal, not inkjetAmazon says to use thermal or laser printers, 300 dpi or better. Ink smears and fades on label stock.
• Use the right sheetPick the layout that matches your label sheet, then print the test page on plain paper and hold it against a sheet in front of a window.
• Black on white, then scanKeep the label white and the ink black, with no glossy cover. Scan one label with a phone or a barcode scanner before you stick a hundred.

Your numbers stay on your device

Everything happens in your browser. The numbers, the product names and the list you paste are not uploaded, stored on our servers or sent anywhere.

If you tick Remember this list, it is saved in this browser only, so it is there next time. Untick it or press Clear saved list and it is gone.