Generate CODE128, EAN-13, EAN-8, UPC-A, CODE 39 and ITF-14 barcodes in your browser. Check digits are computed and verified for you.
Check digit appended: 5901234123457
Print at actual size and verify with your scanner — a barcode you cannot scan is decoration.
Your file is never sent to a server. It is read and processed by your own browser, and the results are not stored.
Every retail symbology ends with a check digit: the rest of the digits are weighted and summed, and the last digit makes the total a multiple of ten. Scanners use it to notice misreads. This tool computes it before drawing, and refuses values whose check digit is wrong rather than drawing bars nobody can scan.
The same math applies to ITF-14 cases, EAN-8 short codes and UPC-A in the US — one algorithm, three weights, one digit on paper.
CODE128 is the catch-all: anything printable fits, dense and self-checking. EAN-13 and UPC-A are what the retail world actually scans at checkout; ITF-14 is what your case of 24 units carries. CODE 39 is older, wider and loved by industrial and medical tooling because it needs no check digit and tolerates imperfect print.
No. Barcode Generator runs in your browser, and the file is read there rather than sent to a server for processing. Our host still sees ordinary page-request metadata, which is described on the privacy page.
Yes, Barcode Generator is free, with no paid tier, no account, and no watermark added to your output. The limits are technical rather than commercial: file size, page count and supported formats are listed on this page.
Barcode Generator supports .txt files up to 0MB directly in your browser.
It renders standards-compliant bars and computes the correct check digits. Whether a specific retailer accepts your value (GS1 prefix ownership) is a separate question of who owns the number, not of the barcode.
If you type 13 digits and the last one is not the computed check digit, the tool tells you the expected value instead of drawing an unscannable barcode.
For internal CODE128 or CODE 39 labelling, yes. Print at sufficient size and verify with your scanner; scanning is the only real test of print quality.
No. The barcode is drawn in this tab and offered as PNG or SVG.