BARCODE NUMBERS · CHECKED LOCALLY

GTIN Barcode Number Checker

Check GTIN-8, UPC-A, EAN-13 and GTIN-14 numbers as you type, see the check-digit working, and get the corrected number or its GTIN-14 form.

GTIN-8
UPC-A
EAN-13
GTIN-14
Mod-10 check digit

Valid

Invalid

Checked

Numbers, one per line

Open text file

Results

How it was worked out

Export

What this checks

Spaces and hyphens are ignored. This checks identifier arithmetic, not product ownership or GS1 registration, and it does not generate barcode images. Up to 250,000 characters, and text files up to 500 KB. Everything runs in your browser, and nothing is saved automatically.

Related workflow: isbn checker.

Using GTIN Barcode Number Checker

Validate GTIN-8, UPC-A, EAN-13 and GTIN-14 check digits and normalize valid numbers to GTIN-14.

Load the example or paste identifiers, one per line.
Results appear as you type. Click a number to see its check-digit working and any corrected number.
Copy or download the result and the optional JSON report.

Example

4006381333931
036000291452
96385074
4006381333930

Questions & answers

What does this tool do?

Validate GTIN-8, UPC-A, EAN-13 and GTIN-14 check digits and normalize valid numbers to GTIN-14.

What should I check before using the result?

Checks identifier arithmetic, not product ownership or GS1 registration. This tool does not generate barcode images.

Is there an upload or installation?

Processing runs in a local browser worker with no processing upload. No account or installation is required. Website ads and analytics follow the site privacy policy.

What input sizes are supported?

Each input supports 250,000 UTF-16 units and UTF-8 files up to 500 KB. Jobs stop after 15 seconds. Report previews show 200 rows; downloaded reports include all computed rows.

Will my work be saved?

No automatic storage is used. Download the result and report before leaving. Changing input invalidates previous output.