LabelChop

Batch print shipping labels: 7 thermal printer fixes for 2026

Batch print shipping labels without tiny barcodes, A4 PDF traps or wasted 4x6 thermal labels.

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If you need to batch print shipping labels, the one-at-a-time workflow has already broken. Ten orders is annoying. Fifty orders turns into a pile of tabs, duplicate downloads and one printer queue you do not fully trust.

The printer usually gets blamed first, but the real problem is often the file. A thermal printer wants one label per page. Many carrier and marketplace downloads still arrive as A4 pages, labels plus packing slips, or mixed PDFs that made sense for office paper but make no sense on a 100x150mm roll.

This refreshed guide focuses on the part sellers actually fight: turning MyPost Business, eBay, Shopify, Etsy, Amazon AU, Royal Mail, USPS or other label PDFs into a boring 4x6 batch print.

Packed ecommerce orders ready for batch label printing

In this article:

Why batch printing shipping labels goes wrong

Batch printing sounds simple. Select orders, download labels, press print.

That works only when the PDF, printer driver and physical label stock all agree. If one of them is wrong, the batch fails fast.

The PDF format does not match the printer

A 100x150mm or 4x6 thermal printer expects one shipping label per page.

A4 PDFs often contain a label in one corner, a receipt, return instructions, blank space, customs pages, or two labels on one sheet. Your printer driver does not know which rectangle is the actual shipping label. It sees the whole page.

If you send a full A4 page to a 4x6 printer, the driver may shrink the entire page onto one label. That is how you get tiny barcodes and address blocks that look fine on screen but fail on the parcel.

Each marketplace exports labels differently

An eBay Australia seller might buy some labels through eBay and send other parcels through MyPost Business. A Shopify seller might use Australia Post for domestic orders, Sendle for some parcels and a carrier portal for odd cases.

The downloads can look similar in your folder, but they are not always the same kind of PDF.

Before you print a batch, open the file and check whether every page is a label. If the file includes packing slips or receipts, send those to a normal printer or save them separately.

The setting that ruined yesterday's label can quietly follow you into today's batch.

Common examples:

  • Paper size is still A4.
  • Scale is set to fit to page.
  • Page range is set to current page.
  • Orientation is wrong.
  • The browser uses a different printer preset from Adobe Reader or Preview.
  • The driver is set to the wrong stock size after a roll change.

Thermal printers repeat mistakes very efficiently. A wrong scale setting can waste 30 labels before you notice.

The 7 checks before you print a batch

Use this checklist before sending a large PDF to the queue.

1. Check the PDF page size

Open the PDF properties or use the preview window. You are looking for one of two cases.

A thermal-ready batch has:

  • One label per page.
  • A page size close to 4x6 inches, 6x4 inches, 100x150mm or 102x152mm.
  • No receipt or packing slip on the same page.
  • Barcodes that fit inside the label edge.

An A4 batch has:

  • A small label on a full A4 page.
  • Two labels on one A4 page.
  • A label plus instructions or a receipt.
  • Large empty space around the label.

If the PDF is already one 4x6 label per page, print it at actual size. If it is A4, crop or convert the labels first.

2. Match the driver to the loaded label stock

Set the printer paper size in the operating system, not only in the app print screen.

Use the size your stock actually is:

| Label stock | Driver setting to try | Notes | |---|---:|---| | 100x150mm | 100x150mm custom size | Common in Australia | | 4x6 inch | 4x6 or 101.6x152.4mm | Common in US wording | | 6x4 inch | 6x4 or 152.4x101.6mm | Common in UK wording | | A6 | 105x148mm | Close, but can clip if your roll is 100x150mm |

A few millimetres can matter when the barcode sits near the edge.

Thermal printer set up for multiple 100x150mm shipping labels

3. Print at actual size

For a clean 4x6 PDF, use actual size or 100 percent scale.

Avoid these settings for shipping labels unless you have tested them:

  • Fit to page
  • Shrink oversized pages
  • Scale to printable area
  • Fill page
  • Borderless enlargement

Those settings are useful for office documents and photos. They are risky for postage labels because they change barcode size.

4. Remove non-label pages

Many batch downloads include extras: packing slips, receipts, pick lists or customs forms.

Do not send those pages to the thermal printer unless they are meant for label stock. Save them as a separate PDF or print them on A4.

A good rule: the thermal printer queue should contain labels only.

5. Print one label first

This feels slow until it saves a full roll.

Print page 1, then check:

  1. The barcode is sharp.
  2. The barcode is not clipped.
  3. The full address is visible.
  4. The label is not rotated sideways.
  5. The tracking number is readable.
  6. The next blank label starts in the right spot.

If one label looks right, the full batch is much safer.

6. Keep downloaded labels in clear folders

A messy Downloads folder causes duplicate labels and missed orders.

A simple folder setup works:

  • Labels to print
  • Printed labels
  • Problem labels
  • Packing slips

Move files after printing. That small habit stops the classic mistake where two PDFs have similar names and the same label gets printed twice.

7. Calibrate after stock changes

If labels drift lower down the roll, skip blank labels or start printing between labels, calibrate the printer.

Run calibration after:

  • Loading a new roll.
  • Switching from roll labels to fanfold labels.
  • Changing label size.
  • Clearing a jam.
  • Reinstalling or updating the driver.

Dymo, Zebra, Brother, MUNBYN and Rollo all handle calibration differently, so use the utility or button sequence for your model.

How to batch print shipping labels from a PDF

The right workflow depends on the file you have, not the platform it came from.

For a clean 4x6 PDF

Use this when every page is already one shipping label.

  1. Open the PDF in Adobe Reader, Preview or another proper PDF app.
  2. Choose the thermal printer.
  3. Set paper size to 100x150mm, 4x6 or 6x4.
  4. Set scale to actual size or 100 percent.
  5. Check the preview for clipping.
  6. Print page 1 as a test.
  7. Print all pages after the test label looks right.

Avoid printing from a browser if the preview looks wrong. Browsers are convenient, but they can hide the driver options you need for thermal labels.

For an A4 PDF with labels inside it

A full A4 page cannot be sent straight to a 4x6 printer unless the label has already been extracted.

You have three options:

  1. Crop each A4 page so the shipping label becomes the full page.
  2. Split two-up A4 label sheets into separate 4x6 pages.
  3. Use a tool that detects the label area and prepares thermal output automatically.

Manual cropping is fine for a small batch. It gets old when you do it every day.

If the source file is A4, fix the PDF before blaming the printer. The printer can only print the page you send it.

For mixed PDFs with packing slips

Some platforms bundle labels and packing slips together. That is fine for A4 office printing. It is painful on a thermal printer.

Before printing, delete or split the non-label pages. If you need packing slips, keep them in a separate file.

Parcels sorted before bulk label printing

How to batch print labels from MyPost Business

MyPost Business remains a common Australia Post workflow for small sellers because it supports business parcel sending without a warehouse system.

The printing part still needs care.

Create or import all parcels first

Do the data work before the printing work.

That may mean:

  • Importing orders from an ecommerce integration.
  • Uploading a CSV.
  • Entering a small run manually.
  • Checking addresses before you pay for labels.

Once the parcels are ready, buy and download the labels together. Do not open and print each label one by one unless you only have a few orders.

Check whether MyPost gives you A4 or thermal-ready output

MyPost Business workflows can produce labels that are easy to print, but sellers still end up with A4 PDFs in real life because of account settings, old downloads, browser defaults or mixed carrier files.

If the label is already a clean 100x150mm page, print at actual size.

If the label is sitting on an A4 page, crop it first. Sending the whole A4 canvas to the thermal printer is the tiny-label trap.

Use automation when the same crop repeats

LabelChop was built for this exact boring problem. It watches your Downloads folder, detects compatible shipping-label PDFs, crops or resizes them to 4x6 output and sends them to your thermal printer.

That helps when your label files come from MyPost Business, marketplaces, carrier portals or mixed workflows and you do not want to open the print dialog for every batch.

If you want to test the crop manually first, try the free A4 to 4x6 shipping label converter.

For mixed carrier exports, check one sample PDF with the carrier format label tool before batch printing. It is faster to catch A4, Letter, 6x4 or custom page sizes before the whole queue wastes labels.

How to handle eBay, Shopify and marketplace labels

Marketplace labels add another layer because order management and postage purchasing may happen in different places.

eBay Australia labels

eBay Australia sellers should check whether the order must use an eBay label or whether a different postage workflow is allowed for their account and listing type. eBay's own seller help says some Australia-based sellers enrolled in free selling may be required to buy labels on eBay for eligible items.

For printing, the same rule applies: check the PDF format before sending a batch to the thermal printer.

If eBay gives you a clean 4x6 label, print at actual size. If you download an A4 layout or a file with extra pages, split it first.

For setup details, read eBay shipping labels Australia: guide for new sellers.

Shopify and other store platforms

Shopify, Etsy, Amazon AU and shipping apps can each produce different label layouts depending on the carrier and app settings.

Do not assume the platform name tells you the page size. Open the PDF.

If you use more than one carrier, batch by file type:

  1. Print native 4x6 labels together.
  2. Convert A4 labels together.
  3. Print packing slips somewhere else.

Mixing everything into one queue is where sellers lose track.

Bulk label printing troubleshooting

When a batch goes wrong, isolate the stage that failed: PDF, driver, print dialog or printer hardware.

Labels print too small

The PDF is probably being shrunk.

Fix it like this:

  1. Check the PDF page size.
  2. If it is A4, crop or convert it first.
  3. Set the printer to 100x150mm or 4x6.
  4. Print at actual size.
  5. Test one page.

Do not use fit to page on a full A4 label PDF.

Labels print sideways

Orientation is mismatched.

Try portrait and landscape only after the page size is correct. If the PDF is A4, crop first. Rotating a bad A4 page still leaves you with a bad A4 page.

Only one label prints from the batch

Check the page range. It may be set to current page.

Also check whether the platform actually downloaded all selected labels. Some dashboards let you select multiple orders but have a separate button for downloading the full batch.

The printer skips blank labels

This usually points to calibration, sensor settings or stock size mismatch.

Run calibration, then confirm the selected media size matches the loaded labels. Check whether your printer expects gap labels, black mark labels or continuous stock.

Barcodes look blurry

Barcodes need crisp black lines and clean white gaps.

Check:

  • Print darkness.
  • Print speed.
  • Barcode scaling.
  • Direct thermal label stock.
  • Print head cleanliness.

Do not keep printing if the first barcode looks faint. Fix one label before you create a bigger problem.

Order packing workflow with labels ready to print

If you are tightening the whole shipping bench, these guides cover the surrounding problems:

Final batch print checklist

Before printing the full run, confirm:

  1. The PDF contains labels only.
  2. Each label is one page.
  3. A4 labels have been cropped or converted.
  4. The driver matches the loaded stock.
  5. Scale is actual size or 100 percent.
  6. The page range is all pages.
  7. One test label prints cleanly.

The trick to batch printing shipping labels is not a fancy printer. It is giving the printer a clean file and stopping hidden scaling before it reaches the queue.

For occasional batches, manual cropping and careful settings are enough. For daily dispatch, automate the repeated crop-and-print step. LabelChop can watch your Downloads folder, prepare compatible label PDFs and send them to your thermal printer while you keep packing orders.

If you want to see whether it fits your setup, check the pricing or read the FAQ before installing.