Validate and calculate check digits for EAN-8, EAN-13, UPC-A, UPC-E, ISBN-10, ISBN-13, GTIN-14, SSCC-18, GLN, GSIN, Code 39 (Mod43), Code 93, MSI Mod10, and ITF Mod10.
Repair mode can suggest possible fixes for partial, OCR-damaged, and malformed codes.
What counts as a valid barcode here?
The tool checks format-specific length and character rules, then verifies check-digit math for the selected standard (including Mod10, Mod43, and Code 93 C/K where applicable).
Does auto-detect always pick the right format?
Not always for overlapping lengths (for example EAN-13 vs ISBN-13). Use explicit format mode when you know the standard.
How does repair mode work?
It applies normalization, OCR-like character mapping, check-digit correction, and bounded brute-force replacement for placeholders.
Which newer standards were added?
SSCC-18, GLN-13, GSIN-17, ITF Mod10, MSI Mod10, Code 39 Mod43, and Code 93 C/K are included.