GTIN Validator & GTIN-14 Checker
Validate GTIN-14 barcodes instantly. Check length, numeric format, and GS1 check digit for testing, ecommerce QA, and barcode data validation.
Paste or type a 14-digit GTIN code to validate
Try These Examples
How GTIN-14 Validation Works
Length Check
GTIN-14 must be exactly 14 digits long.
Format Validation
All characters must be numeric (0-9).
Checksum Calculation
The last digit is calculated using the GS1 algorithm and verified against the provided checksum.
Validation FAQ
What is a GTIN validator?
A GTIN validator checks whether a Global Trade Item Number follows the expected structure, including length, numeric format, and check digit rules. This page focuses on GTIN-14 validation.
How do I check if a GTIN is valid?
Enter the GTIN-14 into the validator. The tool checks that the value has 14 digits, contains only numbers, and has a GS1 check digit that matches the first 13 digits.
Can this tool validate GTIN-8, GTIN-12, GTIN-13, or only GTIN-14?
This validator currently checks GTIN-14 values only. GTIN-8, GTIN-12, and GTIN-13 use the same general GS1 check digit method but have different required lengths, so they are not accepted by this page.
What is the difference between a GTIN checker and a barcode lookup?
A GTIN checker validates the number format and check digit. A barcode lookup tries to match a GTIN to product or company data in a database, which is a separate process.
Why does a GTIN pass checksum validation but still not belong to my product?
Checksum validation only proves that the digits are mathematically consistent. It does not prove GS1 registration, ownership, product assignment, marketplace acceptance, or that the GTIN belongs to your product.
What does a valid GTIN-14 look like?
A valid GTIN-14 is a 14-digit number where the last digit is a checksum calculated from the first 13 digits using the GS1 algorithm.
Why is my GTIN showing as invalid?
Common reasons include: incorrect length (not 14 digits), non-numeric characters, or incorrect checksum digit.
Can I validate multiple GTINs at once?
Currently, you can validate one GTIN at a time. Simply clear the input and enter a new code to validate another.