Question 1

Why does Excel delete the leading zero on my UPC codes?

Accepted Answer

Excel treats barcodes as mathematical numbers and removes the '0'. Format the column as 'Text' before pasting, or use our Excel importer which preserves zeros automatically.

Question 2

How do I fix the scientific notation (E+11) error in Excel?

Accepted Answer

Highlight the column, right-click 'Format Cells', choose 'Number', and set decimals to 0. Our system automatically fixes this during the workspace import.

Question 3

Can I generate barcodes directly from a CSV file?

Accepted Answer

Yes. Simply drag and drop your CSV file directly into our generator to process thousands of rows instantly.

Question 4

What is the maximum number of rows I can upload from Excel?

Accepted Answer

Our client-side engine safely processes up to 75,000 rows in a single batch. Read our blog for tips on handling massive datasets.

Question 5

Why is my CSV file showing special characters?

Accepted Answer

This is a UTF-8 encoding issue. When saving your file in Excel, ensure you select 'CSV UTF-8' before uploading to the workspace.

Question 6

How do I batch convert SKU numbers to barcodes?

Accepted Answer

Export your SKU list, upload it, and select your preferred format. Learn more on our dedicated SKU page.

Question 7

Why are my Excel barcode fonts scanning incorrectly?

Accepted Answer

Free barcode fonts lack start/stop characters. Instead, use a dedicated tool to render true vector images. We explain this fully in our guides.

Question 8

Can you mass generate barcodes without downloading software?

Accepted Answer

Yes. Our tool runs entirely in your browser using client-side architecture, giving you desktop power on our website.

Question 9

How to extract specific columns from a large Excel file?

Accepted Answer

You don't need to. Just upload the whole file, and our importer will let you select which specific column contains the barcode data.

Question 10

Does the generator support Google Sheets?

Accepted Answer

Yes! Simply download your Google Sheet as a CSV or XLSX file and drag it into our workspace.

Question 11

How do I combine multiple Excel files for one print run?

Accepted Answer

We recommend merging your files into a single CSV before uploading to ensure a continuous roll export.

Question 12

What if my Excel file has blank rows?

Accepted Answer

Our system automatically detects and skips blank rows during the import process.

Question 13

Can I add text below the barcode from another Excel column?

Accepted Answer

Yes, you can map a secondary column (like Product Name) to appear as human-readable text below the barcode.

Question 14

Why did my Excel upload fail?

Accepted Answer

Ensure your file is not password protected and is saved as a standard .xlsx or .csv format. If issues persist, contact our support team.

Question 15

How fast can you process 10,000 rows?

Accepted Answer

Because we use local processing, 10,000 rows typically render into a downloadable PDF in under 3 seconds.

Question 16

How do I generate Amazon FNSKU labels in bulk?

Accepted Answer

Upload your Seller Central list, select 'Code 128', and set your dimensions. See our Amazon FBA guide for exact steps.

Question 17

What is the difference between UPC-A and EAN-13?

Accepted Answer

UPC-A is standard in North America, while EAN-13 is global. Read our detailed breakdown on the EAN-13 tool page.

Question 18

Do I need official GS1 barcodes to sell on Amazon?

Accepted Answer

For branded products, yes. However, for FBA fulfillment, you print Amazon's internal FNSKU barcode using our generator.

Question 19

How to convert an ASIN into a scannable barcode?

Accepted Answer

ASINs require the Code 128 format since they contain letters. You cannot use a standard UPC for an ASIN.

Question 20

Does Amazon require a UPC or an FNSKU?

Accepted Answer

UPCs identify the product globally, but FBA fulfillment centers require you to cover it with an FNSKU label.

Question 21

How do I generate labels for Noon FBN?

Accepted Answer

Noon uses similar standards to Amazon. You can format Noon labels perfectly using our Noon FBN tool.

Question 22

Can I print Amazon Transparency codes?

Accepted Answer

Transparency codes are proprietary 2D Data Matrix codes. You can generate the Matrix format in our workspace.

Question 23

What barcode size does Amazon require?

Accepted Answer

Amazon FBA requires labels to be between 1x2 inches and 2x3 inches. You can set these exact dimensions before exporting your PDF.

Question 24

How do I print Poly Bag warning labels with barcodes?

Accepted Answer

You can generate the barcode and add your custom warning text in the label settings within the editor.

Question 25

Why is Amazon rejecting my printed labels?

Accepted Answer

Usually due to low print resolution or missing quiet zones. Always export as a vector roll to ensure compliance.

Question 26

How to generate Walmart WFS labels?

Accepted Answer

Walmart fulfillment uses standard UPC or GTIN formats, which you can easily generate on our UPC page.

Question 27

What is an FBA Box ID label?

Accepted Answer

It is a shipping label for the outer carton, distinct from the item-level FNSKU label.

Question 28

Do you support eBay item barcodes?

Accepted Answer

Yes, eBay accepts standard UPC and EAN codes, both of which are fully supported in our generator.

Question 29

How do I calculate the check digit for an EAN-13?

Accepted Answer

You don't need to. Our EAN engine automatically calculates and appends the 13th digit.

Question 30

Which barcode type is best for retail?

Accepted Answer

EAN-13 is the global retail standard, while UPC-A dominates North America. Generate both in our workspace.

Question 31

How to format a PDF for a 50x30mm thermal printer?

Accepted Answer

Select the 'Continuous Roll' output and enter 50x30mm in the dimensions. Learn more on our PDF export page.

Question 32

Why are my thermal printed barcodes blurry?

Accepted Answer

Disable 'Fit to Page' in your printer settings, and always use our vector roll export instead of JPEGs.

Question 33

Can I print continuous rolls instead of A4 sheets?

Accepted Answer

Yes! Bypassing standard A4 pages is our specialty. Use the PDF Roll feature.

Question 34

Will this software work with my Dymo LabelWriter?

Accepted Answer

Absolutely. Just enter your Dymo label's millimeter dimensions into the workspace.

Question 35

How do I align barcodes on Avery labels?

Accepted Answer

We bypass confusing templates. Enter your exact custom sizes and download a ZIP file to arrange, or print directly via PDF.

Question 36

Can you print barcodes on a regular laser printer?

Accepted Answer

Yes. Download a ZIP archive of PNG images to drag into Word for standard laser printing.

Question 37

What size should a shipping thermal label be?

Accepted Answer

For couriers like FedEx, the standard is 100x150mm (4x6 inches).

Question 38

How to fix Zebra printer skipping blank labels?

Accepted Answer

This is a sensor calibration issue, but ensuring your exported PDF has zero margins will prevent software-side blank skips.

Question 39

Does the generator work with Rollo printers?

Accepted Answer

Yes, perfectly. Set your width to match your Rollo stock in the editor.

Question 40

Why is my barcode scanner reading the wrong numbers?

Accepted Answer

Usually due to a stretched image. Never stretch barcodes horizontally. Download precise sizes from the generator.

Question 41

Can I print multiple barcodes on one wide label?

Accepted Answer

Currently, our PDF export formats one barcode per vertical label cut to ensure thermal printer compatibility.

Question 42

How dark should I set my thermal printer?

Accepted Answer

Set darkness between 7 and 10 for optimal contrast on standard thermal paper when printing our barcodes.

Question 43

Do you support 300 DPI exports?

Accepted Answer

Yes, our PNG images inside the ZIP export are rendered at high-resolution 300 DPI.

Question 44

Can I print colored barcodes?

Accepted Answer

Standard scanners require high contrast (black on white). While you can change colors in the workspace, we recommend sticking to black.

Question 45

How to stop my PDF from shrinking when printing?

Accepted Answer

In Chrome/Edge print dialogue, set 'Scale' to 'Actual Size' or '100%' when printing your PDF.

Question 46

Is it safe to upload my confidential company inventory?

Accepted Answer

100% safe. Your data is processed entirely in your local browser. Read our privacy policy for details.

Question 47

Do you offer an API for warehouse integration?

Accepted Answer

Yes, Enterprise users can access our REST API. Please reach out to contact support for API keys.

Question 48

Why does the browser freeze on 100,000 labels?

Accepted Answer

Rendering 100k high-res images exceeds computer RAM limits. We recommend batches of 50k in the workspace.

Question 49

Can I download my barcodes as a ZIP file of images?

Accepted Answer

Yes. Switch the export setting to ZIP Archive to receive individual named PNG files.

Question 50

Is the software offline compatible?

Accepted Answer

The web tool requires internet to load, but processing is local. Contact support for offline enterprise binaries.

Question 51

What is the safest bulk barcode generator?

Accepted Answer

Client-side generators are the safest, ensuring data never hits a server. We explain this in our blog.

Question 52

Are QR codes better than standard barcodes?

Accepted Answer

QR codes hold more data, but older warehouse scanners only read 1D codes. Test both in our workspace.

Question 53

Where is my data stored?

Accepted Answer

Nowhere. We do not store your uploaded Excel files or generated barcodes. See our privacy page.

Question 54

How do you name the files in the ZIP export?

Accepted Answer

Each image in the ZIP is automatically named using the barcode number or SKU it represents.

Question 55

Can I self-host this software?

Accepted Answer

Self-hosting options are available for large logistics corporations. Please contact our enterprise sales team.

Question 56

Does this software work on Mac?

Accepted Answer

Yes, it is entirely web-based and works flawlessly on macOS, Windows, and Linux via our website.

Question 57

Is there a limit to the ZIP file size?

Accepted Answer

Your browser limits ZIP generation to around 2GB. If you hit this limit, generate smaller batches via the export tool.

Question 58

Why do I need a modern browser?

Accepted Answer

We utilize advanced HTML5 Canvas and WebAssembly to generate the PDFs lightning fast.

Question 59

Do you use cookies?

Accepted Answer

We use essential cookies to save your tool preferences. Read our full privacy statement.

Question 60

How to report a bug?

Accepted Answer

If you encounter an issue, please take a screenshot and send it to our support desk.

Question 61

How to generate FedEx tracking barcodes in bulk?

Accepted Answer

Use the Code 128 format and set the label size to 4x6. See our dedicated FedEx guide.

Question 62

What is Code 128 and when should I use it?

Accepted Answer

It is a high-density alphanumeric barcode perfect for internal SKUs. Try it in the workspace.

Question 63

What is ITF-14 used for?

Accepted Answer

ITF-14 is exclusively used on corrugated shipping boxes to identify trade items. Generate them on our platform.

Question 64

How to generate sequential serial number barcodes?

Accepted Answer

Use our Sequential tool. Enter a prefix and quantity, and it auto-generates the list.

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