UPC-A Barcode Generator
UPC-A Barcode Generator. Free, no signup, no watermark. Runs in your browser — your file never leaves your device.
How to upc-a barcode generator
- Enter your details — Fill in the fields above. The code redraws as you type, so you can see exactly what you are going to get.
- Set the appearance — Adjust the size and colours if you need to. Keep strong contrast between the code and its background, or scanners will struggle.
- Download — Save the image and test it with a phone camera before you print or publish it.
What this tool does
To generate a UPC-A Barcode, enter the value above. The barcode renders immediately as a scalable SVG, and the check digit is calculated for you when the number is one digit short. The tool is free, needs no account, applies no watermark, and has no daily limit.
What this tool does
Retail barcode symbologies have fixed lengths and a check digit that scanners verify. Enter a number that is one digit short and this tool calculates the check digit for you; enter one where the check digit is wrong and it says so, with the digit it expected. That is the difference between a label that scans and a print run that has to be redone.
Why nothing is uploaded
This tool runs entirely on your own device. Your file is read into memory by JavaScript on this page, processed there, and handed back to you as a download. It is never transmitted to us, which means there is nothing on our side to store, log, leak or forget to delete.
You can verify that yourself: load this page, disconnect from the internet, and the tool still works. That is a different claim from a privacy policy promising prompt deletion, and it is the reason this site exists.
What it costs
Nothing. There is no account, no email capture, no free-trial countdown, no watermark on the output and no daily limit. The site is funded by advertising, which sits below the tool and never between an input and its result.
Works offline
Because everything runs locally, this tool keeps working once the page has loaded even if your connection drops. That is worth knowing on a train, on conference WiFi, or anywhere the network is unreliable — and it is the clearest demonstration that your file really is not going anywhere.