Developer Tools
GTIN-14 Check Digit Calculator
Calculate or verify a GTIN-14 check digit for packaging and carton-code examples directly in your browser.
GTIN-14 uses 13 data digits plus one check digit for carton, case, and packaging identifiers. This checks digits only and does not look up GS1 records.
GTIN-14 checksum workflow tips
Use this calculator when you need digit-level GTIN-14 checks for case, carton, packaging, or product-data examples without uploading or looking up identifiers.
Prepare sample numbers
Use Number List Generator or Random Number Generator for local test data, then verify individual GTIN-14 examples here.
Generate adjacent barcodes
Use EAN-13 Barcode Generator, UPC-A Barcode Generator, or EAN-8 Barcode Generator for SVG barcode previews.
Limitations
This calculator validates the check digit only. It does not confirm company prefixes, GS1 ownership, packaging hierarchy, or retail-product records.
What this tool does
The GTIN-14 Check Digit Calculator removes spaces and hyphens, calculates the final digit from 13 base digits, or verifies a pasted 14-digit value. Use it for product-data QA notes, carton-code examples, packaging fixtures, and browser-local checksum checks.
Common use cases
Calculate or verify a GTIN-14 check digit for packaging, carton, and product-code examples locally without uploading or querying GS1 records.
Use GTIN-14 Check Digit Calculator when you are working with copied API payloads, logs, encoded values, config snippets, identifiers, or debugging data and need a quick browser-local check before pasting the result into docs, tickets, tests, or another developer tool.
How to use it
- Enter 13 GTIN-14 base digits to calculate the final check digit, or paste 14 digits to verify an existing value.
- Review the normalized input, calculated check digit, and full GTIN-14 output generated locally.
- Copy the result for product-data documentation, spreadsheet QA, sample labels, or fixture handoffs.
Example workflow
Copy a small payload or encoded value from an API response, request URL, log line, or config file. Run the focused check here, confirm the output is readable, then continue with related developer data tools such as validation, formatting, decoding, timestamp conversion, or CSV/JSON conversion.
Privacy note
GTIN-14 check digit calculation runs locally in your browser. ClearUtils does not upload, store, fetch, query GS1 records, or log product-code input.
FAQ
Can this calculate a GTIN-14 check digit?
Yes. Enter 13 digits and the calculator adds the fourteenth check digit using the standard GTIN weighting formula.
Does this confirm GS1 ownership?
No. It validates the numeric check digit only and does not query GS1 prefixes, company ownership, packaging hierarchy, or product records.
Is my GTIN uploaded?
No. GTIN-14 check digit calculation runs locally in your browser and does not upload, store, fetch, or log input.
Explore more tools
Browse the Developer Tools hub or continue with the Developer Data Toolkit when this task is part of a larger workflow.