Amazon Label Cropper

An Amazon label cropper built for Seller Central PDFs

Amazon sellers in India ship in more than one way. Some use Easy Ship, where Amazon arranges the pickup and delivery. Others ship the parcel themselves with a courier of their own choice and upload the tracking details. Whichever route you take, the parcel needs a label, and in most cases Seller Central gives you that label as a PDF that is laid out for a normal A4 sheet. The Amazon Label Cropper on this page converts that PDF into a 4x6 inch file so you can print it on a thermal label printer without cutting, pasting or shrinking anything by hand.

It suits Easy Ship and self-ship sellers who want to trim an Amazon shipping label PDF, split the invoice from the label, or fit a thermal roll without scaling errors.

The tool reads every page of your file, finds the printed label, removes the empty margins and places it on a 4 inch by 6 inch page. You can upload a single label or a long batch. The output is one new PDF, with one 4x6 page for each page in the original.

LabelsCropper is an independent project. We are not part of Amazon, we do not have any link to your Seller Central account and we cannot see your orders. You download the label yourself, you choose it from your own device, and the cropped file is saved back to your own device.

The problem with printing Amazon labels on A4 paper

An Amazon label PDF often carries more than the label itself. Depending on the shipping option and the document you choose, a page may include the label, a packing slip, an invoice and a block of blank space. If you send that page to a thermal printer, the printer has to decide what to do with a page that is far larger than the sticker. It usually scales everything down, and a barcode that has been scaled to a third of its size may stop scanning at the pickup point.

Printing on plain paper is a safe fallback, but it brings costs of its own. You use a full sheet for each parcel, you need scissors and tape, and an A4 sheet taped to a small box tends to peel off in transit. A courier that cannot read a label will return the parcel or hold it, and every delayed parcel can affect your seller metrics. A properly sized sticker printed on a thermal roll sticks better, scans better and looks more professional.

How to crop an Amazon shipping label in six steps

1. Get the label PDF. In Seller Central, open the orders you are about to dispatch and use the option that prints or downloads the shipping label. If you handle many orders, select them together so you get one PDF with all labels. Names of menus and buttons change over time, so follow the wording on your own screen.
2. Add the file. Drop the PDF on the upload area above or tap the area to pick the file. There is no fixed page-count or file-size cap. Very large PDFs depend on available browser/device memory.
3. Pick padding. Normal (6%) is the best starting point. Tight gives a larger label on the sticker, and Loose gives extra white space if your printer clips edges.
4. Pick the crop mode. Label only is selected by default. It keeps the first block of content on each page and ignores a packing slip or invoice that sits below with a clear gap. Keep everything on page crops around all printed content instead.
5. Let it process. A progress bar shows each page being cropped. All of the work is done on your device, so the speed depends on your phone or computer.
6. Download and print. The 4x6 PDF is saved automatically. Check the first label on screen and then print on your 4x6 printer with the scale set to 100 percent.

What happens inside the tool

The cropper is made of a few simple parts, and knowing them makes it easier to get the result you want.

Loading the engine on demand

When you choose a file, your browser loads two version-pinned open source libraries hosted with this site: PDF.js to read the file and jsPDF to build the new one. They load only when needed, so the page stays quick to open.

Detecting where the label is

Each page is drawn quietly on a hidden canvas. The tool scans that picture and marks every pixel that is not nearly white. Printed rows are joined into blocks, and a block ends when the tool meets an empty band taller than about 3.5 percent of the page. The first block that is tall enough to be a real label, at least 8 percent of the page height, is chosen in Label only mode. This is how a packing slip below the label is left out and how a small line of header text above it is ignored.

Redrawing at print quality

The page is then drawn again, but only the label area is drawn, and it is drawn at a high resolution of about 1200 pixels across. This matters for barcodes, because the thin bars need crisp edges to scan. Drawing only the label area also protects your phone's memory, which is why even long files finish without freezing on most devices.

Placing it on a 4x6 page

The cropped picture is placed on a 4x6 inch page with a small safe margin. It keeps its original proportions, so the label is never stretched. After the last page the file is saved. The pages are images, so the text in the output cannot be copied, which is normal for a file made only for printing.

Label sizes explained for Amazon sellers

You will see label sizes written in several ways, and it is easy to mix them up. The table shows the same 4x6 size in the units that printer menus and label suppliers use.

If your printer lists both 4x6 inch and 100 x 150 mm, either choice works with the cropped file, because the difference is only about 1.6 mm in width and 2.4 mm in height. What matters more is that the printer is set to the paper size of the roll that is actually loaded, and that scaling is turned off.

A note on other Amazon labels: product labels such as FNSKU stickers and inbound box labels for fulfilment centre shipments are different documents with their own rules. This tool crops any simple PDF label to 4x6, so you can try it on them, but always follow the instructions that Amazon gives for those labels and check the preview before printing.

Setting up your thermal printer

If you have never used a thermal printer before, these steps will save you a lot of wasted labels.

• Install the driver supplied by the printer maker. A generic driver may work, but the maker's driver usually offers the right paper sizes.
• Load the roll with the printable side facing up and feed it through the sensor. Then run the calibration or feed function so the printer measures the sticker length.
• Create a custom paper size of 4 x 6 inches if the driver does not already list one.
• In the print dialog choose Actual size, turn off headers and footers and set margins to none.
• Print one label first. Check that the barcode is dark and that the edges are not cut off.

Direct thermal printers use heat-sensitive paper, so labels fade if left in a hot place for months. If you need labels to last, keep rolls in a cool, dry spot and print only what you will ship soon.

Practical advice for Amazon sellers

• Print before packing. Print all labels first, then pack in the same order. The label on top of the pile goes on the parcel you pack first.
• Stick on a flat surface. Place the label on the biggest flat side of the parcel, away from seams and corners, so the barcode is not bent or cut when the box is taped.
• Cover old labels. If you reuse a box, remove or fully cover any old shipping label so a scanner cannot read the wrong barcode.
• Keep the packing slip separate. If you need the invoice or packing slip inside the box, print it on an ordinary printer and keep the 4x6 label only for the outside.
• Handle time-sensitive orders first. Crop and print priority and same-day dispatch orders in their own small batch so they are not delayed behind a long file.
• Do a daily scan test. Scan the first printed label with a phone before you print a large batch.

If Amazon changes its label layout, the cropper's detection will usually still work because it looks at the printed content rather than at fixed coordinates. If a new layout does not crop well, try the other crop mode and a different padding value.

Privacy for you and your buyers

Every Amazon shipping label has a buyer's name, address and phone number on it. That is personal data you are responsible for protecting. The Amazon Label Cropper never uploads your PDF. It is opened and edited in your browser, and the new file is built there too. We have no server that receives your label, so there is nothing for us to store, share or lose.

The page loads its PDF libraries and styles from this website. Those requests do not include your label. The privacy policy explains this and also describes how advertising cookies work on this site.

When an Amazon label does not crop as expected

• The label looks small. The crop may include a packing slip. Use Label only mode or choose Tight padding.
• The barcode edge is touching the border. Choose Loose padding to add white space around the label.
• Only half of the label appears. A very wide empty band inside the label can look like a gap between two sections. Choose Keep everything on page.
• The PDF will not open. The file may be damaged or password protected. Download it again from Seller Central or remove the password.
• The page says the engine could not load. Refresh the page and try once more. If the problem continues, use the Contact page to report it.
• Printing is blurry. Check that the printer is set to its native resolution and that the print head is clean.

You may also want the Flipkart Label Cropper, the Ajio Label Cropper or the PDF Label Cropper if you sell on more than one marketplace.

More output sizes and a separate invoice file

The default output is 4x6 inches, but the Output size menu above the upload box also offers 100 x 150 mm, A6, A5, 3 x 5 in, 4 x 4 in and a custom width and height in millimetres. If you print on an ordinary office printer, choose an A4 sheet with 2 or 4 labels and the tool arranges the labels on each sheet so you can cut them apart. The size you pick is remembered on this device.

If your Amazon PDF has the invoice printed below the label, tick the option to save the invoice part as a separate PDF. The label file downloads as usual, and a Download invoices PDF button appears with the invoice parts on A4 pages. This works in Label only mode and needs a clear empty gap between the label and the invoice. If none is found, the tool tells you.

Handling busy days and festive sale seasons

Order volume on Amazon is not steady. Festive sales, month-end offers and brand promotions can double or triple the number of parcels a small seller has to ship in a single day. Label printing is one of the first places where a weak process shows up, so it is worth planning ahead.

Start by deciding how many labels go into one PDF. A file of 40 to 80 labels is easy to check by eye, quick to crop and simple to print in one go. A file with 200 labels is allowed by the tool, but a single mistake such as a wrong printer setting wastes far more labels. Many sellers cut their day into rounds, for example one round before lunch for the morning pickup and one in the afternoon for the evening pickup, and crop each round as its own file.

Next, make sure you have enough supplies before the busy period begins. A 4x6 roll holds a few hundred labels, so a seller doing 300 parcels a day needs several rolls a week. Keep at least one spare roll next to the printer, plus a spare ribbon if you use a thermal transfer printer. Running out in the middle of a pickup window is the most common cause of late dispatch.

It also helps to name your files clearly before you crop them. Save each downloaded PDF with the date and the round, such as the date followed by morning or evening. The cropped file is saved as labelscropper-4x6-labels.pdf, so rename it straight away if you plan to keep it. Clear names make it easy to find the right file if a courier asks you to reprint a label later in the day.

Finally, think about returns and reshipping. If a parcel comes back and you need to send it out again, download a fresh label rather than reusing the old one, because the tracking number on an old label may no longer be valid. Crop the new label the same way and print it as usual.