Contact

What to email about

Anything related to Bulk Barcode Generator is fair game. The most common categories, and what to include so a helpful reply is possible:

Bug reports

If something in the generator behaves incorrectly — a barcode value that will not render, a PDF that comes out with the wrong layout, an Excel upload that fails to parse, a ZPL file that a Zebra printer rejects — please include:

• The barcode symbology you selected (Code 128, EAN-13, UPC-A, QR Code, Data Matrix, or Code 39).
• A sample of the input value or values that trigger the problem. If the values are sensitive (real customer SKUs, private URLs), swap in fake versions that still reproduce the issue.
• The export format that failed (PNG ZIP, SVG ZIP, PDF, or ZPL).
• Your browser and operating system — for example, "Chrome 128 on macOS 14" or "Firefox 129 on Windows 11".
• If it is a printing issue, the printer model and DPI setting (for example, "Zebra ZD421 at 203 DPI" or "Brother QL-820NWB").
• A screenshot if the problem is visual.

Feature requests

Suggestions for new symbologies, additional Avery templates, extra ZPL DPI options, alternative label sheet sizes, or workflow improvements are always read. Not every request is a good fit for the "free, no-signup, in-browser" scope of the tool, but the ones that are usually ship within a few weeks. Say what you are trying to accomplish, not just what you want the button to do — the underlying goal is often more useful than the proposed feature.

Integration and API questions

The tool has no public API today. It is a self-contained web application, not a service you would integrate into a backend workflow. If you need programmatic barcode generation for a server-side pipeline, the underlying bwip-js library is what powers the rendering here and can be embedded directly into your own code. Happy to point you at the specific configuration this site uses if that helps.

Press, partnerships, and collaboration

Writing a blog post that mentions the tool, filming a YouTube tutorial, comparing it against another tool, or including it in a resource roundup? Screenshots and links are welcome without prior permission. If you want a quote or a longer conversation about the "why" behind the tool, email and say so.

Privacy inquiries

Concerns about data handling, cookies, analytics, or a request to review our practices — email with "Privacy" in the subject line. See the Privacy Policy for the full picture before sending, since most privacy questions are covered there.

Response times

Business days means Monday through Friday, excluding major public holidays. If you have not heard back in a week, feel free to send a follow-up — the original message may have hit a spam filter.

Before emailing about a common issue

Two problems come up often enough that they are worth answering here rather than in a reply. If your question matches one of these, the answer below is probably faster than waiting for a response.

"Excel dropped the leading zero on my UPC codes."

Excel stores values that look like numbers as numbers, and numbers do not have leading zeros. A UPC like 012345678905 becomes 12345678905, which is 11 digits instead of 12 and generates an invalid barcode. The generator detects this pattern on upload and shows an amber warning banner. The fix is on the Excel side: before saving, format the SKU column as Text (not Number) so Excel preserves the leading zero. Alternatively, prefix each value with a single quote ('012345678905) which forces text mode without changing the visible value.

"My printed Avery labels are misaligned from row 3 onward."

Browsers scale PDFs when printing unless you tell them not to. The generator embeds a "PrintScaling: None" flag in every PDF to hint at this, but the print dialog often overrides it. In the browser print dialog, set Scale to 100 percent (sometimes labeled "Actual size" or "None"), uncheck "Fit to page", and uncheck "Shrink oversized pages" if present. Use the alignment test PDF (available from the PDF export panel) to verify positioning against a blank Avery sheet before running a large batch.

Other useful pages

• The generator — the tool itself.
• About — why this project exists and who built it.
• Privacy Policy — what data is and is not collected.
• Terms of Service — the rules for using the tool.