About ClearBarcode
- Free for commercial use
- No sign-up
- Nothing uploaded
ClearBarcode is a free barcode and label generator for sellers. It makes UPC-A, UPC-E and EAN barcodes, bulk barcodes and label sheets, and FNSKU labels for Amazon FBA, and it calculates GS1 check digits. It is free for commercial use, with no sign-up.
What we do and don't do
- Your barcodes are made in your browser tab. What you type is never sent to us or to analytics.
- We never sell or issue U.P.C. numbers, and we don't point you to anyone who resells them. The tools are for drawing barcodes for numbers you already have.
- The tools refuse a wrong check digit and show the correct one, instead of quietly changing your number.
- ClearBarcode is not affiliated with, sponsored by or endorsed by GS1, GS1 US or Amazon.
How barcodes are sized
Sizes are set by the X-dimension, the width of the narrowest bar, as in GS1's standard. The bars are rounded to whole dots of your printer, never below GS1's minimum, and the tool shows the size it actually used. The barcode size guide explains the numbers.
How we check that barcodes are correct
The tools try to read back each barcode in your browser before you download it. A pass means our reader decoded the image; it is not a GS1 verification. If the check can't run, the tool says so and you can still download, so check the barcode yourself. Quiet zones and minimum sizes are checked from the barcode's own measurements, because a decoder can read codes that a store scanner would reject.
Before release we test the generator against worked examples from GS1's standard and against a second, independent barcode encoder, and we decode every barcode type in every file format back to its input.
During our research we test-printed barcodes on a 600 dpi laser printer and scanned them with a phone. We have not yet tested a 203 dpi thermal printer.
Where our facts come from
Sizes and rules come from the GS1 General Specifications (Release 26.0) and Amazon's Seller Central help pages. Each guide lists its sources at the end and the date we read them; forum reports are labeled as such. Where a rule isn't published, we say so rather than guess.
Who runs ClearBarcode
ClearBarcode is run by Silver Pepper Labs Corp., a small US company. Questions or problems: hello@clearbarcode.com.
Open source
ClearBarcode is built on open-source libraries, including bwip-js to draw barcodes, zxing-wasm and zxing-cpp to read them back, and pdf-lib to write PDF files. Their licenses are on the open-source notices page. What you may do with the barcodes you make is in the license section of the terms of use.