About Bulk Barcode Generator

Why this tool exists

Bulk Barcode Generator started with a simple, frustrating afternoon in early 2026. I was trying to print a few hundred UPC labels for a small e-commerce side project, opened a spreadsheet of SKUs, and went looking for a web tool that could turn the list into a print-ready PDF. Within an hour I had cycled through five different "free bulk barcode generators" and hit every possible dark pattern:

• One tool capped the free tier at 20 codes and asked for $9.99 a month to unlock more.
• Another watermarked every image so the output was useless for actual printing.
• A third required creating an account, verifying an email, and then still hid the PDF export behind a paid plan.
• A fourth generated the images but exported them at 72 DPI, which turned into a blurry mess on a thermal printer.
• The last one uploaded my SKU list to a server in a jurisdiction I could not identify, which felt uncomfortable for what was supposed to be a purely local operation.

The strange part is that none of these limitations existed for any technical reason. Rendering a barcode is not computationally expensive. Parsing a CSV file is not either. Generating a PDF at 300 DPI, laying labels out for a standard Avery template, emitting ZPL for a Zebra printer — every one of those steps is a well-solved problem with mature open-source libraries. The paywalls and watermarks existed purely as business models bolted on top of what should have been a five-minute task.

I closed the last tab, opened a code editor, and spent the next few weekends building the version I had wanted to find in the first place.

What the tool does

The result is at bulkbarcodegenerator.pro. You paste a list of values, or upload a CSV or Excel file, pick a barcode format, and download the output. That is the entire user journey. Behind the scenes it supports:

• Six barcode symbologies: Code 128, EAN-13, UPC-A, QR Code, Data Matrix, and Code 39.
• Four export formats: 300 DPI PNG (bundled in a ZIP for batches), scalable SVG for print or design workflows, PDF with Avery label-sheet layouts and custom single-label sizes, and native ZPL commands for Zebra, Rollo, and SATO thermal printers.
• A serial-number generator with configurable prefix, starting value, count, and zero-padding, for when you need sequential SKUs but do not have a spreadsheet to import.
• Leading-zero detection on Excel imports, because Excel silently strips the leading zero from UPC and EAN codes stored as numbers, and if you do not catch it you will print a batch of invalid barcodes.
• A pre-print alignment PDF you can hold against a blank label sheet to verify positioning before running a large batch.

The promises

Because the whole point of this project was to fix the failures of other free tools, the operating principles are worth stating explicitly:

Who this is for

The users I built the tool for, in rough order of who I hear from most often:

• Amazon FBA sellers printing FNSKU labels, UPC labels for retail, or transparent codes for Brand Registry products.
• Third-party logistics (3PL) and warehouse operators generating Code 128 bin labels, SKU tags, and internal tracking barcodes at scale.
• Small retailers tagging in-house merchandise, sale items, or price labels for a POS system.
• Small manufacturers managing work-in-progress tracking, component labels, and finished-goods labeling without buying a $2,000 seat of BarTender.
• Restaurants, cafes, and food producers generating date-code and lot-number labels on 2.25×1.25 inch or 4×6 inch thermal rolls.
• Etsy, Shopify, and eBay sellers who need a barcode on a product tag but do not want to learn Illustrator to make one.

If your workflow is "I have a spreadsheet of values, I need each one on a printed label", the tool is for you.

Who built it

Bulk Barcode Generator is a one-person project. I am Carl, an independent developer with a background in web applications. The site is not backed by a company or investor, has no employees, and is not tied to any commercial barcode software vendor. I answer support emails personally. When you send feedback, it reaches the same person who wrote the code.

The reason to say this out loud is that many "free" tools in this space are lead-generation funnels for a paid desktop product or a subscription SaaS. This one is not. It exists as a standalone free tool because I still use it myself, and because rebuilding the wheel for something already solved would be worse than keeping the existing wheel spinning.

The tech stack, briefly

For anyone curious about what powers the site — every choice below was made to keep the tool fast, reliable, and honest to the "runs in your browser" promise:

Build tool

Vite 8 with the Rolldown engine

Language

TypeScript

Barcode rendering

bwip-js 4 (MIT-licensed)

PDF generation

jsPDF 4 (MIT-licensed)

CSV parsing

PapaParse 5 (MIT-licensed)

Excel parsing

SheetJS 0.20 (Apache 2.0)

Batch packaging

JSZip 3 (MIT-licensed)

Hosting

Static file hosting, no application server

Analytics

Google Analytics 4 (aggregate traffic only)

Get in touch

Feature requests, bug reports, or "this saved me two hours today" notes are all welcome. Email carlxue985211@gmail.com or use the Contact page. Real replies come from a real human, usually within a couple of business days.