How is the check digit handled?
Twelve-digit input is completed with the computed GS1 mod-10 check digit; thirteen-digit input is verified and rejected with the expected digit named when it mismatches.
Free tools · Barcodes
Read any EAN-13 in the frame.
EAN-13 retail symbols per ISO/IEC 15420 and the GS1 General Specifications — 12 digits gain their check digit, 13 digits are verified. Nothing is uploaded anywhere.
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Questions
EAN-13 Reader & Scanner, answered.
If you manage servers by hand, see the engineering services behind this tools series.
What about EAN-13 with +2/+5 add-ons?
Price and issue add-ons ride beside the main symbol; the dedicated EAN add-on work in the barcode generator covers main+supplement composites and their read-back.
Why did my EAN-13 fail to read?
Curved packaging distorts the outer bars — flatten the label, shoot straight-on, and make sure all 13 digits plus both quiet zones are in frame.
Are my images uploaded?
No. Pixels and decoded payloads stay in memory on this device. The page makes no network requests with your data and clears the result after ten idle minutes.
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