Why does 27 fail while 027 works?

Two digits select a smaller symbol that stops at 26. Three digits select a larger one that allows values up to 292, so 027 works. Leading zeroes change the symbol structure in Channel Code. Keep the length required by your system; do not remove or add zeroes just to make a code render.

How do I check the code before printing?

Leave the white margins intact, keep the image in proportion and scan a sample at its final printed size with the device you intend to use.

Channel Code barcode generator

Create compact Channel Code labels for short numbers and download PNG or SVG.

Using Channel Code

Channel Code packs short numbers into a linear barcode. Input limits by length are: 2 digits: 00–26; 3: 000–292; 4: 0000–3493; 5: 00000–44072; 6: 000000–576688; 7: 0000000–7742862. Letters and web links are not supported. Confirm that your scanner supports Channel Code.

Download PNG for documents or SVG for a sharp, resizable print layout. Generation takes place in your browser, without an account.

Questions about Channel Code

Why does 27 fail while 027 works?: Two digits select a smaller symbol that stops at 26. Three digits select a larger one that allows values up to 292, so 027 works. Leading zeroes change the symbol structure in Channel Code. Keep the length required by your system; do not remove or add zeroes just to make a code render.
How do I check the code before printing?: Leave the white margins intact, keep the image in proportion and scan a sample at its final printed size with the device you intend to use.